Page 3 of 5 FirstFirst 12345 LastLast
Results 31 to 45 of 64
  1. #31

    Thumbs down Re: Reef Ball updates. MBMP

    Quote Originally Posted by Moonlighter View Post
    Actually Trev, while that sounds like a good idea, i understand that they are actually made out of a special concrete blend that attracts and supports marine growth. Not all concrete is suitable.

    Like a lot of things, what looks simple on the surface has a fair bit more in the detail when you get into it.

    Actually, here, i found a brochure for you all. Says they require special marine grade concrete free from toxic additives:

    http://www.reefballaustralia.com.au/..._aust_2011.pdf
    I agree with Trev , no special expensive ingredient involved , that couldn't be added/or removed in the initial batch-mixing...
    Moonlighter don't fall for the "special shit" needed crap ,and THANKYOU for your previous efforts 4 RecFishos

  2. #32
    Ausfish Silver Member
    Join Date
    Jan 2010
    Blog Entries
    1

    Re: Reef Ball updates. MBMP

    AH MR ROBINSON LOOKING FOR BROWNIE POINTS HEY MMM INTERESTING. Why has the Reef Deployment program started down there. MMM just coincidence it"s in your ELECTORATE.

  3. #33

    Re: Reef Ball updates. MBMP

    I would say that a concrete batching plant would have 99% of it's concrete non-toxic - I can only imagine the concrete could be toxic if you added things to it like plasticiser etc - which are generally not in usual concrete.

    Yes most concrete is 25, 32 or 40MPa not the 60MPa they use - but as a reef ball you only need additional strength to lift it - once in place it is no advantage over 25MPa and yes the ball can be made to be easily lifted into place with a 25MPa mix.

    I read the notes - sounds a bit over the top to me. You can be sure they don't write stuff like that for jetty, bridge pylons, piers etc.

    As for making the outside rough - yes that is how it lands if you don't touch it with a trowel.

    Anyway with my limited knowledge of 30 years in the industry and a structural engineer - I think they are nothing special really - just more expensive.

    Thanks for posting it though - was a bit funny
    Cheers

    Trev

  4. #34

    Re: Reef Ball updates. MBMP

    Reefball australia seems to be a business that makes money off making reef balls for the govt and doing tenders for other countries. reefballs.org is a non profit that provides concrete molds for a small cost and the concrete recipe for free. reefball.org would have licensed reefball australia but i wonder if all projects downunder have to go through them. Here is the recipe for concrete and the reinforcements. They have many styles. With out a doubt i believe the bigger the ball the better.

    Reefball.org has a suggested retail price when dealing with a contractor of $200 us per ball (for the same size ball deployed). QLD cost is $1086 aud per ball including deployment. Fair bit of profit margin there and alot of wiggle room for a non profit or fishing club to get involved and get funding from the govt and get some bang for the buck. As reefball.org is a non profit i doubt that they would care that another non profit is competing with a for profit contractor.
    Concrete recipe

    PART I - GENERAL

    1.01 Section Includes

    A. Concrete proportioning and products to be used to secure concrete, which when hardened will produce a required strength, permeability, and resistance to weathering in a reef environment.

    1.04 References

    A. ACI-211.191-Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete.
    B. ASTM C 260- Standard Specifications for Air-Entraining Admixtures for Concrete.
    C. ASTM-C 1116 Type III- Standard Specifications for Fiber Reinforced Concrete or Shotcrete.
    D. ACI - 305R -91- Hot Weather Concreting.
    E. ACI - 306R -88- Cold Weather Concreting.
    F. ACI - 308- Standard Practice for Curing Concrete.
    G. ASTM C 618-Fly Ash For Use As A Mineral Admixture in Portland Cement Concrete.
    H. ASTM C 494-92- Standard Specifications for Chemical Admixtures for Concrete.
    I. ASTM C 1202-91- Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration.
    J. ASTM C 33- Concrete Aggregates.
    K. ASTM C 94- Ready Mix Concrete.
    L. ASTM C 150-Portland Cement.
    M. ACI 304- Recommended Practice For Measuring, Mixing, Transporting and Placing concrete.
    N. ASTM C 39 (Standard Specifications For Compressive Testing)
    O. ASTM C-1240-93 (Standard Specifications for Silica Fume Concrete)

    PART II PRODUCTS

    2.01 Portland Cement: Shall be Type II and conform to ASTM C-150

    2.02 Fly Ash: Shall meet requirements of ASTM C-618, Type F. And must be proven to be non-toxic as defined by the Army Corps of Engineers General Artificial Reef Permits. Fly Ash is not permitted in the State of Georgia and in most Atlantic States. (In October, 1991, The Atlantic States Marine Fisheries Commission adopted a resolution that opposes the use of fly ash in artificial reefs other than for experimental applications until the Army Corps of Engineers develop and adopt guidelines and standards for use.)

    2.03 Water: Shall be potable and free from deleterious substances and shall not contain more that 1000 parts per million of chlorides or sulfates and shall not contain more than 5 parts per million of lead, copper or zinc salts and shall not contain more than 10 parts per million of phosphates.

    2.04 Fine Aggregate: Shall be in compliance with ASTM C-33.

    2.05 Coarse Aggregate: Shall be in compliance with ASTM C-33 #8 (pea gravel). (Up to 1 inch aggregate can be substituted with permission from the mold user.) Limestone aggregate is preferred if the finished modules are to be used in tropical waters.

    2.06 Concrete Admixtures: Shall be in compliance with ASTM C-494.

    2.07 Required Additives: The following additives shall be used in all concrete mix designs when producing the Reef Ball Development Group's product line:

    A. High Range Water Reducer: Shall be ADVA Flow 120 or 140.

    B. Silica Fume: Shall be Force 10,000 Densified in Concrete Ready Bags as manf. by W.R. Grace. (ASTM C-1240-93) or any of the permitted equivalent silica fume Brands as defined in the training manual Appendix K

    C. Air-Entrainer: ONLY IF ADVA is not used: Shall be Darex II as manf. by W.R. Grace (ASTM C-260)

    2.08 Optional Additives: The following additives may be used in concrete mix designs when producing Reef Ball Development's product line.

    A. Fibers. Shall be either Microfibers as manf. by W.R. Grace, or Fibermesh Fibers (1 1/2 inches or longer) as manf. by Fibermesh. EitherNovember 1, 2007ators: Any Non- Calcium Chloride or Daracell as manf. by W.R. Grace may be used. (ASTM C-494 Type C or E)

    C. Retarders: Shall be in compliance with ASTM-C-494-Type D as in Daratard 17 manf. by W.R. Grace

    2.09 Prohibited Admixtures: All other admixtures are prohibited. Other admixtures can be submitted for approval by the Reef Ball Foundation Inc. Services Division by sending enough sample to produce five yards of concrete, the current MSDS, and chemical composition (which will be kept confidential by RBDG Ltd.) A testing fee of $2,500 must accompany the sample. Temporary approval will be granted or denied within 10 days based on chemical composition, but final approval may take up to 3 months since samples must be introduced in a controlled aquarium environment to assess impacts on marine and freshwater species.

    PART III Concrete Proportioning:

    A. General: The intent of the following proportions is to secure concrete of homogeneous structure which will have required strength and resistance to weathering.

    B. Proportions:



    One Cubic Yard

    One Cubic Meter

    Cement:

    600 lbs. (Min.)

    356 kg

    Aggregate:

    1800 lbs.

    1068 kg

    Sand:

    1160 lbs

    688 kg

    Water:

    240 1bs. (Max.)

    142 kg

    Force 10K:

    50 lbs

    30 kg

    Grace Microfibers

    .25 bag

    .3 bag

    *Adva Flow 120 or

    Adva Flow 140

    3.5-5 ounces per 100 lbs cement
    or
    6-10 ounces per 100 lbs cement

    1

    *NOTE: Adjust Adva dosage as needed to obtain workable, placeable mix (170-250mm / 7-10 inch slump), and to achieve .40 w/c ratio.

    Fibers: 0-3# (Max.) as needed to reduce micro cracking 1# (Min.) required if Silica Fume exceeds 50#

    Accelerator: As needed to achieve de-molding no sooner than: 3-4 hours for heavy duty molds (All Polyform side balls) 6-7 hours for standard molds (Molds with any tether balls)



    NOTE: Silica Fume or Force 10K shall be dosed at a 10# minimum in Bay Balls and Pallet Balls while Ultra & Reef Balls shall require a minimum of 25#. All molds must use at least 50# for floating deployments. All mold sizes must use at least 50# for use in tropical waters unless special curing procedures are followed.* This product is being specified not only for strength, but also to reduce pH to spur coral growth, to reduce calcium hydroxide, and to increase sulfate resistance. It is a non-toxic pozzalan.

    * Special curing procedures for tropical waters without 50# of Silica Fume per yard should include storage in a fresh water or high humidity environment for a minimum of 60 days or less with higher temperatures, or until the surface pH of the modules is below 9.5 pH when placed in seawater.

    NOTE: End of day concrete may be used, but follow these additional requirements.

    -Do not use concrete that has a temperature of over 100 degrees Fahrenheit -The original mix must have been at least 3,500 PSI -50# of added microsilica or more is required unless microsilica at that dose was already in the starting mix -Add additional Portland if needed to achieve a .4 w/c ratio. Take into account water added on site -Advise mold user to allow extra time for curing to achieve minimum de-molding strength. -Mold or module user must be notified that EOD waste was used.

    NOTE: Fly Ash, when permitted, may be used as a substitution for cement up to a maximum replacement of 15% and as an additional substitute for microsilica at 30% to 40% of cementitious material. (Call RBDG for details.)

    Part IV Concrete Testing Requirements:

    A. Compressive strengths shall be tested in accordance with ASTM C 39. Compressive strengths shall reach a minimum of the following table at the time of use of at least:





    Super/Ultra/Reef Ball

    Pallet Ball

    Bay Ball and all smaller sizes

    Floating Deployment

    8,500+

    7,000+

    6,000+

    Barge Deployment

    7,000+

    5,500+

    4,000+

    To remove from mold

    750+

    750+

    750+

    To lift from base

    1,500+

    1,200+

    1,000+

    B. Permeability of concrete shall be tested in accordance with ASTM C 1202-91. Coulomb requirement shall be 2500 coulombs or less at 90 days. End of day waste shall be 3000 coulombs or less at 90 days.

    THIS SPECIFICATION SHEET IS ONLY A SAMPLE. CONTACT RBDG FOR CUSTOM SPECIFICATIONS.

    Minimum Standards for Reef Ball Foundation Authorized Contractors
    1) All deployments made by authorized contractors must have at least 90% of modules upright and intact or they must supply free deployed replacement to purchaser. This is REGARDLESS of what the customer says is acceptable.

    2) All new construction after Jan. 1, 1998 must use ADVA Flow superplastisizer rather than WRD-19, Reduce the amount of air entrainment by 35-50% so that entrainment remains at 6% +/- 2%. (This will not impact your costs).

    2a) All new construction after July 2002 must have Attachment Adapter Plug system installed and at least 50% of the recommended number of attachment adapters for the particular sized Reef Ball must be usable.

    3) All Reef Balls must be constructed with a "wavy" bottom formed by adding sand in the mold before inserting center bladder.

    4) The rinsing of the outside layer of concrete is not optional to expose the surface texture due to the pH rise on the surface of the poorly set concrete. (If rinsing is impractical, use a non-oil based biodegradable mold-releasing compound instead of sugar water. Increase air entrainment to 8% and do not tap the concrete into the mold heavily to create as much "honeycombing" as you can.)

    5) The following are MINIMUM guidelines for microsilica use, primarily for pH reduction. Again, these are REGARDLESS of what the customer says is acceptable.

    Hard Corralled Waters (Florida border & south on East Coast, Hernando County and south on Gulf.) (Anywhere near the Flower Gardens of Texas, anywhere near Grey's Reef in SC)

    Deployed less than 45 days from casting = 50 lbs/yard
    Deployed > 45 days < 90 days from casting = 45 lbs/yard
    Deployed > 91 days < 120 days from casting = 40 lbs/yard
    Deployed > 121 days < 150 days from casting = 35 lbs/yard
    Deployed > 151 days < 180 days from casting = 30 lbs/yard
    Deployed > 181 days < 210 days from casting = 25 lbs/yard
    Deployed > 211 days < 240 days from casting = 20 lbs/yard
    Deployed > 240 from casting = 15 lbs/yard

    Temperate / Cool Waters (North of above & all of West Coast)

    Deployed less than 29 days from casting = 50 lbs/yard
    Deployed > 30 days < 90 days from casting = 30 lbs/yard
    Deployed > 91 days < 120 days from casting = 25 lbs/yard
    Deployed > 121 days < 150 days from casting = 20 lbs/yard
    Deployed > 151 days < 180 days from casting = 15 lbs/yard
    Deployed > 181 days < 210 days from casting = 10 lbs/yard
    Deployed > 211 days < 240 days from casting = 5 lbs/yard
    Deployed > 240 from casting = not required

    6) End of day waste still requires full 50 lbs/yard of Mircosilica regardless of location/time

    7) All other proprietary standards, including an approved mix design must be upheld.





    FIbermess Product Guide Specifications
    SI Concrete Systems
    4019 Industry Drive
    Chattanooga, Tennessee 37416
    Toll Free (800) 621-1273
    Phone (423) 892-8080
    Fax (423) 892-0157
    Website www.siconcretesystems.com
    E-mail fibermesh@sind.com

    Specifier Notes: This product guide specification is written according to the Construction Specifications Institute (CSI) 3-Part Format as described in The Project Resource Manual—CSI Manual of Practice. The section must be carefully reviewed and edited by the Architect or Engineer to meet the requirements of the project and local building code. Coordinate this section with other specification sections and the Drawings. Delete all “Specifier Notes” when editing this section.

    Section numbers are from MasterFormat 1995 Edition, with numbers from MasterFormat 2004 Edition in parentheses. Delete version not required.



    SECTION 03240 (03 24 00)

    SYNTHETIC FIBER REINFORCEMENT



    Specifier Notes: This section covers SI Concrete Systems Fibermesh® 150 polypropylene fibers for use as concrete secondary reinforcement. Consult SI Concrete Systems for assistance in editing this section for the specific application.



    PART 1 GENERAL

    1.1 SECTION INCLUDES

    A. Polypropylene fibers used as concrete secondary reinforcement.

    1.2 RELATED SECTIONS

    Specifier Notes: Edit the following list of related sections as required for the project. List other sections with work directly related to this section.

    A. Section 02750 (32 13 00) - Rigid Paving.

    B. Section 03210 (03 21 00) - Reinforcing Steel.

    C. Section 03300 (03 30 00) - Cast-in-Place Concrete.

    D. Section 03370 (03 37 13) - Shotcrete.

    E. Section 03500 (03 50 00) - Cementitious Decks and Toppings.

    1.3 REFERENCES

    Specifier Notes: List standards referenced in this section, complete with designations and titles. This article does not require compliance with standards, but is merely a listing of those used.

    A. ASTM C 94 - Standard Specification for Ready-Mixed Concrete.

    B. ASTM C 1116 - Standard Specification for Fiber-Reinforced Concrete and Shotcrete.

    C. Southwest Certification Services (SWCS), Omega Point Laboratories No. 8662-1.

    D. UL Report File No. R8534-11.

    1.4 SUBMITTALS

    A. Comply with Section 01330 (01 33 00) - Submittal Procedures.

    B. Product Data: Submit manufacturer’s product data, including application rate and mixing instructions.

    Specifier Notes: Delete samples if not required.

    C. Samples: Submit manufacturer’s sample of synthetic fiber reinforcement.

    D. Manufacturer’s Certification:
    1. Submit manufacturer’s certification that synthetic fiber reinforcement complies with specified requirements.
    2. Submit evidence of manufacturer’s ISO 9001:2000 certification.
    3. Submit evidence of satisfactory performance history of synthetic fiber reinforcement.

    1.5 QUALITY ASSURANCE

    A. Manufacturer’s Qualifications:
    1. Synthetic fiber reinforcement manufactured in ISO 9001:2000 certified facility.
    2. Minimum 10-year satisfactory performance history of specified synthetic fiber reinforcement.

    1.6 DELIVERY, STORAGE, AND HANDLING

    A. Delivery: Deliver synthetic fiber reinforcement in manufacturer’s original, unopened, undamaged containers and packaging, with labels clearly identifying product name, unique identification number, code approvals, directions for use, manufacturer, and weight of fibers.

    B. Storage:
    1. Store synthetic fiber reinforcement in clean, dry area indoors in accordance with manufacturer’s instructions.
    2. Keep packaging sealed until ready for use.

    C. Handling: Protect synthetic fiber reinforcement during handling to prevent contamination.



    PART 2 PRODUCTS

    2.1 MANUFACTURER

    A. SI Concrete Systems, 4019 Industry Drive, Chattanooga, Tennessee 37416. Toll Free (800) 621-1273. Phone (423) 892-8080. Fax (423) 892-0157. Website www.siconcretesystems.com. E-mail fibermesh@sind.com.

    2.2 SYNTHETIC FIBER REINFORCEMENT

    A. Synthetic Fiber Reinforcement: Fibermesh 150.
    1. Material: 100 percent virgin homopolymer polypropylene multifilament fibers, containing no reprocessed olefin materials.
    2. Conformance: ASTM C 1116, Type III.
    3. Fire Classifications:
    a. UL Report File No. R8534-11.
    b. Southwest Certification Services (SWCS), Omega Point Laboratories No. 8662-1.

    Specifier Notes: Specify graded or single-cut lengths.

    4. Fiber Length: [Graded] [Single-cut lengths].
    5. Alkali Resistance: Alkali proof.
    6. Absorption: Nil.
    7. Specific Gravity: 0.91.
    8. Melt Point: 324 degrees F (162 degrees C).



    PART 3 EXECUTION

    3.1 MIXING

    A. Add synthetic fiber reinforcement to concrete mixture in accordance with manufacturer’s instructions.

    B. Add synthetic fiber reinforcement into concrete mixer before, during, or after batching other concrete materials.

    Specifier Notes: Lower application rates may be acceptable depending upon local building codes. Consult SI Concrete Systems for more information.

    C. Application Rate: Add synthetic fiber reinforcement at standard application rate of 1.5 pounds per cubic yard (0.90 kg/m3) of concrete.

    D. Mix synthetic fiber reinforcement in concrete mixer in accordance with mixing time and speed of ASTM C 94 to ensure uniform distribution and random orientation of fibers throughout concrete.

    Force 10,000 Specifications (Microsilica)
    Concrete Products
    Technical Guide Specification
    Microsilica Concrete
    SECTION 03320
    PART 1 - GENERAL
    1.01 SUMMARY
    A. This section specifies microsilica (silica fume) admixture for the reduction of concrete permeability to protect against intrusion by chlorides and other aggressive chemicals, and for the production of high-strength concrete.
    B. Related Sections: Other specification sections which directly relate to the work of this Section include, but are not limited to, the following:
    1. Section 03300 - Cast-In-Place Concrete.
    2. Section 03365 - Post-Tensioned Concrete.
    3. Section 03400 - Precast Concrete.
    1.02 SUBMITTALS
    A. Product Data: Submit manufacturer’s product data, installation instructions, use limitations and recommendations for each material.
    B. Test and Performance Data: Submit independent test data substantiating the product’s ability to reduce concrete permeability by chlorides and other aggressive chemicals.
    1.03 QUALITY ASSURANCE
    A. Manufacturer: Concrete admixture shall be manufactured by a firm with a minimum of 5 years experience in the production of similar products. Manufacturers proposed for use but not named in these specifications shall submit evidence of ability to meet all requirements specified, and include a list of projects of similar design and complexity completed within the past five years.
    B. Materials: For each type of material required for the work of this Section, provide primary materials which are the products of one manufacturer.
    C. Pre-Construction Conference: A pre-construction conference shall be held two weeks prior to commencement of field operations to install the specified product in order to establish procedures to maintain optimum working conditions and to coordinate this work with related and adjacent work. Agenda for meeting shall include concrete and admixture handling, placing, finishing, and curing.
    D. Manufacturer’s Representative: A representative of the manufacturer shall be present for project start-up during initial concrete placement. Engineer may waive requirement for manufacturer’s representative if Contractor provides sufficient evidence that producer and finisher have adequate experience with admixtures required.
    E. Trial Mix: Provide a minimum 4 cubic yard (3 m3) trial mix containing proposed concrete design mix placed at the job site in location acceptable to the Engineer. Engineer may waive requirement for trial mix if Contractor provides sufficient evidence that producer and finisher have adequate experience with low water cement ratio mixes.
    1.04 PROJECT CONDITIONS
    A. Perform work only when existing and forecasted weather conditions are within the limits established by the manufacturer of the materials and products used.
    PART 2 - PRODUCTS
    2.01 MANUFACTURER
    A. Provide Force 10,000® microsilica concrete admixtures by Grace Construction Products meeting specified requirements. For customer service in North America:
    Call toll free: 877-4AD-MIX1 (877-423-6491)
    Fax toll free: 877-4AD-MIX2 (877-423-6492)
    2.02 MATERIALS
    A. Microsilica Admixture: Provide Force 10,000 concrete admixture by Grace Construction Products complying with ASTM C 1240.
    2.03 CONCRETE MIXES
    A. Application Rate:
    NTS This section may be used for concrete permeability requirements or high-strength concrete. Application rate (dosage rate) of microsilica may vary depending on individual project requirements. Application rates may be stated in dry pounds per cubic yard, percent of weight of cement, or as required to meet a performance criteria. Typical application rates for low permeability concrete varies from 30 to 60 lbs/cy. Specifier should use only one of the three sections which follow for A. Application Rate.

    NTS Force 10,000 Sample Specification For Permeability Requirements
    This sample specification may be used by the design engineer when specifying Force 10,000 microsilica for the reduction of concrete permeability to protect against intrusion by chlorides or other aggressive chemicals. Force 10,000 is a microsilica-based admixture manufactured by Grace Construction Products of W. R. Grace & Co.-Conn.
    The high silicon dioxide content of microsilica combines with the excess calcium hydroxide in the concrete to form more calcium silicate hydrate “glue.” This chemical reaction plus its fine particle size allows Force 10,000 to fill in the voids between the cement grains and aggregate to deliver less permeable concrete. When chlorides migrate through the concrete and attack the steel reinforcing, corrosion occurs. By reducing the permeability of the concrete, chlorides take much longer to reach the steel which extends the service life of the structure considerably. Chlorides are typically present from deicing salts or from a marine environment. Structure applications of Force 10,000 include parking garages, bridge decks and overlays, reinforced pavements, and all structures in a marine environment. Structural concrete design criteria shall follow ACI 318, 357 and 201 guidelines. Parameters used in this sample specification, such as water/cementitious ratio and concrete cover over reinforcing steel, are taken from these guidelines and are conservative values.
    There are two ways to specify microsilica concrete for permeability requirements: by prescription or by performance. The prescription method mandates the number of pounds of microsilica per cubic yard to be used while the performance method uses ASTM C 1202 test method to measure “coulombs.” Please use one method (prescription or performance) but not both. If the “performance method” is the preferred choice, use ASTM C1202 for mix design purposes only, not as a mix acceptance or rejection criteria during the construction phase. Since the chloride’s loading rate and final concrete quality are unknown factors, W. R. Grace cannot guarantee the longevity of the protection offered by Force 10,000. Quality concrete as recommended by ACI and the addition of Force 10,000 will slow the ingress of chlorides into the concrete. Neither quality concrete nor Force 10,000 will stop corrosion forever, but both will retard the onset of corrosion.
    Prescription Method
    1. Provide microsilica admixture Force 10,000 as manufactured by Grace Construction Products.
    2. Microsilica shall be added at a rate of (50) pounds dry weight of microsilica per cubic yard [(30) kg/m3] of concrete.
    3. Compressive strength shall be a minimum of (5,000) psi [35 MPa] at 28 days as measured using (4” x 8”) (100 mm x 200 mm) cylinder specimens.
    4. A maximum water-to-cementitious ratio of 0.40 is required.
    5. Microsilica may be counted as cementitious material in calculations.
    6. Add microsilica as a liquid slurry or in dry densified form in 25 lb (11.4 kg) Concrete Ready BagsTM packaging.
    7. Blended cements with interground microsilica will not be allowed.
    Performance Method
    1. Provide microsilica admixture Force 10,000 as manufactured by Grace Construction Products.
    2. Microsilica shall have a minimum of (5,000) psi [35 MPa] at 28 days as measured using (4” x 8”) (100 mm x 200 mm) cylinders.
    3. Permeability of microsilica concrete shall be tested by ASTM C 1202. Results of tests shall be expressed in electrical units of coulombs. Coulomb tests shall be made on two (4” x 8”) (100 mm x 200 mm) representative samples, moist cured for 56 days. Test cylinders shall be made according to ASTM C 31. Coulomb requirement shall be (_____) coulombs or less at 56 days. ASTM C 1202 testing shall be used as an indicator of concrete permeability at mix design submittal only.
    4. A maximum water-to-cementitious ratio of 0.40 is required.
    5. Microsilica may be counted as cementitious material in calculations.
    6. Add microsilica as a liquid slurry or in dry densified form in 25 lb (11.4 kg) Concrete Ready Bags packaging.
    7. Blended cements with interground microsilica will not be allowed.
    NTS: Force 10,000 Sample Specification For High-Strength Concrete Requirements
    This sample specification may be used by the design engineer when specifying Force 10,000 microsilica for the production of high-strength concrete. The design engineer should fill in the compressive strength required. Force 10,000 is a microsilica-based admixture manufactured by Grace Construction Products of W. R. Grace & Co.-Conn. The high silicon dioxide content of microsilica combines with the excess calcium hydroxide in the concrete to form more calcium silicate hydrate “glue.” This produces a stronger, tighter bonding paste structure. Additionally, the extreme fineness of the microsilica enables it a less permeable paste. These two factors contribute to providing higher strength, more durable concrete.
    Structural applications for high strength Force 10,000 concrete are broad, but include usage in structural columns, beams and girders. Structural concrete design criteria shall follow ACI 318, 357 and 201 guidelines. Parameters used in this sample specification, such as water-to-cementitious ratio are taken from these guidelines and are conservative values. This sample specification is based on the performance method, whereby the compressive strength of the concrete is mandated by the design engineer.
    High-Strength Concrete Requirements
    1. Provide microsilica admixture Force 10,000 as manufactured by Grace Construction Products.
    2. Microsilica high-strength concrete shall have a minimum of (____) psi [(___) MPa] at 28 days.
    3. Test cylinders shall be 4” x 8” (100 mm x 200 mm).
    4. A maximum water-to-cementitious ratio of 0.40 is required.
    5. Microsilica may be counted as cementitious material in calculations.
    6. Add microsilica as a liquid slurry or in dry densified form in 25 lb. (11.4 kg) Concrete Ready Bags packaging.
    7. Blended cements with interground microsilica will not be allowed.
    B. Concrete Cover Over Reinforcement: Minimum concrete cover over reinforcement shall be (____) inches [(____) mm].
    NTS: Follow ACI 318 recommendations for concrete cover over reinforcement. For deicing salt and marine environments, ACI 318-89, section R7.7.5, requires 2 inches (50 mm) for walls and slabs and 2-1/2 inches (64 mm) for other members. For marine environments, ACI 357 recommends 2-1/2 inches (64 mm).
    C. Air Entrainment: For freeze-thaw durability comply with ACI 318 freezing and thawing exposure requirements, as determined by ASTM C 173 or ASTM C 281.
    D. Water-to-Cementitious Ratio: Provide 0.40 maximum. Microsilica, fly ash, blast furnace slag and cement are considered cementitious materials. The water content of Force 10,000 slurry shall be included as mix design water.
    E. Recommended Cementitious Content for Workability:
    Maximum Aggregate Minimum Cementitious
    3/8” (10 mm) 700 pounds/cu.yd. (415 kg/m3)
    1/2” (13 mm) 680 pounds/cu.yd. (400 kg/m3)
    3/4” (20 mm) 650 pounds/cu.yd. (385 kg/m3)
    1” (25 mm) 630 pounds/cu.yd. (375 kg/m3)
    F. Compressive Strength: Minimum 28 day compressive strength for microsilica concrete shall be (5,000) psi [(35) MPa] unless stated otherwise in Section 2.03 A. Application Rate.
    G. Concrete Slump for Flatwork: 5 to 8 inches (125 to 200 mm). Concrete slump may be 2 inches (50 mm) over normal concrete slumps as microsilica concrete can be sticky and has a surface that is harder to close than normal concrete.
    H. Concrete Admixtures: High-range water reducers are mandatory to control slump, mixing, cementitious ratio and proper distribution of the microsilica, and shall be plant added. Additional water reducers may be added at the job site when required.
    I. Additional Concrete Admixtures: Additional concrete admixtures conforming to ASTM C 494 or equivalent CSA 266 standards may be used as required including the following:
    1. Type A: Water-reducing admixture, WRDA® series or Daracem®-55 by Grace Construction Products.
    2. Type D: Water-reducing and retarding admixture, Daratard®-17 by Grace Construction Products.
    3. Type F or G: Water-reducing, high-range admixture, WRDA-19, Daracem-100 by Grace Construction Products. This type of admixture must be included in all Force 10,000 concrete.
    4. Type C: Accelerating admixture, PolarSet® by Grace Construction Products.
    5. Grace MicroFibers® for flatwork, at 1 pound per cubic yard (600 grams/m3) addition rate.
    6. DCI® or DCI-S Corrosion Inhibitor by Grace Construction Products may also be used if required at rate recommended by manufacturer.
    J. Special Mixing Requirements for Densified Microsilica: Densified microsilica requires enhanced mixing to ensure full dispersion. The following mix requirements shall be adhered to:
    1. For all types of mixing equipment, mix times shall be increased by 40% over the minimum mix time required to achieve mix uniformity as defined by ASTM C 94.
    2. For truck-mixed and central mixed concrete, maximum allowable batch size shall be 80% of the maximum as called out by ASTM C 94.
    PART 3 - EXECUTION
    3.01 EXAMINATION
    A. Examine conditions of substrates and other conditions under which work is to be performed and notify Owner, in writing, of circumstances detrimental to the proper completion of the work. Do not proceed until unsatisfactory conditions are corrected.
    3.02 CONCRETE PLACEMENT, FINISHING AND CURING
    A. Concrete Finishing and Curing: Microsilica concrete typically exhibits little or no bleeding. To reduce plastic or drying shrinkage cracks, comply with ACI 302 “Guide for Concrete Floor and Slab Construction”, ACI 308 “Standard Practice for Curing Concrete”, ACI 306 “Standard Practice for Cold Weather Concreting”, and ACI 305 “Hot Weather Concreting.”
    1. Underfinish microsilica concrete by limiting finishing operation to screeding, bull-float, and broom finish. Curing shall be initiated within one hour of concrete placement.
    2. The use of wind breaks, sun shades, and fog misting are recommended to minimize the rate of evaporation at the concrete surface.
    3. Light fog misting above the concrete to keep the environment above the concrete surface at high humidity is recommended during the placing and finish operations.


    4. Fog misting is required when the rate of evaporation at the concrete surface exceeds 0.1 pound per square foot per hour as determined by ACI 308 Section 1.2.1. Fogging shall continue after the finishing operation until prewetted burlap or other approved curing material is placed over the concrete. When fog misting is not available or possible, an evaporation retarder shall be applied before and after bull-floating and during final finish to protect the concrete.
    5. Wet curing is the preferred method for curing. Use prewetted burlap to cover all flatwork and keep wet for a minimum of seven days or until the time necessary to attain 70 percent of the specified compressive strength, as recommended by ACI 308 Section 3.1.3.
    3.03 PROTECTION
    A. Protect completed work from damage and construction operations throughout finishing and curing operations.

  5. #35

    Re: Reef Ball updates. MBMP

    Mark i asked this on the other thread and i thought i would put this here to double my chances of a response.


    HI mark. Is the data that your govt has used to evaluate the value, viability and effect on the environment (and other things boffins think of) available for perusal ie enviromental impact statements and the like . I would think there are quite a few groups south of the border who would love to see a few hundred reef balls placed in spots around NSW. The pittwater / hawkesbury/ broken bay area comes to mind as an area that would benefit greatly from reef balls. Was the cost of the balls at $265k including installation and management and other stuff only public servants think of.
    IF you could provide the information for us south of the border so we may try and grab some funds from the NSW rec fishing trust.

    Kind regards

    Snapper Dan

  6. #36

    Re: Reef Ball updates. MBMP

    geez, they must have stacked 'em high. beware of prop damage at the following marks...
    the Redlands times advises: "The coordinates for west peel artificial reef are 27.29.880 S 153.18.725 E. Go to 27.34.106 S 153.21.094 E for the east coochie artificial reef".
    fishing's as simple as 3 P's - patience, perserverance and PLASTIC!

  7. #37

    Re: Reef Ball updates. MBMP

    Quote Originally Posted by manta man View Post
    AH MR ROBINSON LOOKING FOR BROWNIE POINTS HEY MMM INTERESTING. Why has the Reef Deployment program started down there. MMM just coincidence it"s in your ELECTORATE.
    Manta man. I'm always looking for opportunities for rec fishers in Moreton Bay. And let's face it, Moreton bay fishers were ripped off by Labor. I certainly commend Moon lighter for getting some compensation for the green zones in the form of artificial reefs, but it is not a fair deal to lock rec fishers out. So I am looking for everything I can get that improves the situation for rec fishers, including increased access to MNPs. Do you think I should stop trying?

  8. #38

    Re: Reef Ball updates. MBMP

    Quote Originally Posted by snapperdan View Post
    Mark i asked this on the other thread and i thought i would put this here to double my chances of a response.


    HI mark. Is the data that your govt has used to evaluate the value, viability and effect on the environment (and other things boffins think of) available for perusal ie enviromental impact statements and the like . I would think there are quite a few groups south of the border who would love to see a few hundred reef balls placed in spots around NSW. The pittwater / hawkesbury/ broken bay area comes to mind as an area that would benefit greatly from reef balls. Was the cost of the balls at $265k including installation and management and other stuff only public servants think of.
    IF you could provide the information for us south of the border so we may try and grab some funds from the NSW rec fishing trust.

    Kind regards

    Snapper Dan
    Hey Snapper Dan. Sorry, wasn't ignoring you, just didn't get time. I often find I can chat for short bursts so if a few questions I dont get to them all. Sometimes I am accused of 'ducking' questions - fair enough, but it is a time thing. Not my jurisdiction outside Southern Moreton Bay (Cleveland), so is more out of my own interest to try to chat further abroad as I can.

  9. #39

    Re: Reef Ball updates. MBMP

    And now part 2 - sorry again Dan, the email went before it was sent.
    Re the environmental process, I don't have specific details at hand, so suggest you google the Qld govt website. If you have no luck come back to me and I will try. Perhaps get onto your state MP and find out what they are doing if you haven't already.
    Re costing, while I don't have the full details i believe the $265k for the 224 reef balls was all inclusive. Hope that helps.

  10. #40

    Re: Reef Ball updates. MBMP

    Quote Originally Posted by Mark Robinson MP View Post
    And let's face it, Moreton bay fishers were ripped off by Labor. I certainly commend Moon lighter for getting some compensation for the green zones in the form of artificial reefs, but it is not a fair deal to lock rec fishers out.
    Those of us who backed Timmi's and your e-petition on this subject received a quite different claim from Steve Dickson MP, the LNP's Minister for Nation Parks, Sport and Recreation.
    It including these gems
    "Science played a key role in determining the marine park zoning."

    "Recreational fishing interests were consulted on the current MBMP zoning arrangements and recreational fishing data was considered in the planning process. This ensured that the most popular recreational fishing areas of the Bay were excluded from green zones."


    The Minister's full statement http://www.parliament.qld.gov.au/Doc.../5412T1858.pdf

    Many of us here backed you and Timmi, the least you could have done was explain what the hell happened.
    The Minister's response appears to indicate that now the LNP is in power, they suddenly agree that Labor got the green zones right. And with a majority like the LNP have in parliament at the moment, if there was any will at all to unlock the green zones and allow more access for rec-anglers, it could easily be done.
    The LNP have been in power well over 12 months now but the green zones and the snapper regs that you and your party complained so loudly about before the election are still in place, and it appears you have not moved 1 inch on the, what's it take?. I was at the Tinny n Tackle Show that day Mark, I and plenty of others heard what you and Campbell said would happen for rec-anglers when the the LNP got in. I understand the political system and I do realize you're trying but aren't able to bring about the changes yourself, but how about acknowledging the current green zone situation is the current Government's responsibility. After 12 months you own it, not Labor. And while your at it, how about taking some responsibility for your pre-election statements too, you're still yet to do that.

    And please please please explain that e-petition debacle Mark.

    Cheers
    Mike D
    ~~~><))))*>

  11. #41

    Re: Reef Ball updates. MBMP

    I don't live in QLD but at least your MP is out there having some sort of crack and also communicating with you - for the good of fisho's in general. Come to NSW and you won't be complaining I can assure you. Well done Mark for at least having a go - and on a positive side you seem to try and take on board the feedback that many experienced fisho's here seem to give you but alas not all people will fully appreciate resource constraints and political pressures - it can all seem very easy from an armchair! Cheers, braders.

  12. #42

    Re: Reef Ball updates. MBMP

    Quote Originally Posted by braders83 View Post
    I don't live in QLD but at least your MP is out there having some sort of crack and also communicating with you - for the good of fisho's in general. Come to NSW and you won't be complaining I can assure you. Well done Mark for at least having a go - and on a positive side you seem to try and take on board the feedback that many experienced fisho's here seem to give you but alas not all people will fully appreciate resource constraints and political pressures - it can all seem very easy from an armchair! Cheers, braders.
    Braders, I believe I have acknowledged Marks efforts, but how long would you wait for a government elected with a 78 to 9 seat majority, to deliver on things they claimed they do for rec-anglers as soon as they were elected? Some at very little cost too.
    Braders, after 12 months in power and with the current 74 to 15 majority, is it still plausible for Mark to blame the previous government for a situation, especially after he identified it in Parliament but his party decided to drop it like a lead balloon (unlike their previous stated position).
    Cheers

  13. #43

    Re: Reef Ball updates. MBMP

    HI Mike - Yes your comments and arguments are very much valid. 78 to 9 and now 74 to 15 yes I do understand where you're coming from. I don't want to turn this post into a political football, but I have seen first hand the other side of politics and in particular the health and education industries. I can understand how (and why) political priorities change before and after elections (and i don't agree with why / how that is the case) - but I do understand. Sometimes, there's more important things in life than an extra reef in wherever - and regardless of whoever promised who - what, where and when. I've got a finance background - and when the numbers don't add up, they simply don't add up. Sacrifices have to be made and people inevitably disappointed (i'm usually one of them!). All levels of government (local, state and federal) are under increasing pressure from us (as ratepayers / taxpayers etc) to do more with their money than what they have. All I was saying in my original post is that this Mark Robinson guy (who i don't know from a bar of soap) at least seems to be on here having a go - albeit doing the best (or what appears to be his best from my view) with what resources he has available. As i said, don't want to turn this into a political football - i think it's great that blokes like you are out there keeping the pollies honest and doing the best you can for us and our kids fishing interests. Not many of the public take the time to do that. Cheers for that and keep fighting mate! - braders.

  14. #44

    Re: Reef Ball updates. MBMP

    I do believe that there is a continuing roll out of Arti Reefs for Queensland.

    $2 mill has been earmarked for a program over 4 years.

    IMO........... that is better than nothing but way too little for a serious program. We splashed $2 mill in little over 12 months and got 6 ( 5 new and 1 extension ) in the MBMP.

    My calculations and proposal is a $5 mill initial first year dollop and then $2 mill a year thereafter. We need ongoing monitoring and this does not come cheap. $500,000 per year.

    Let's not chuck all the $'s at SEQ, but spread it to all population heavy coastal communities.

    Materials of opportunity must be a priority in terms of Bang for Buck.

    Cheers LP
    Kingfisher Painting Solutions:- Domestic and Commercial.

    For further information, contact details, quotes or advice - Click Here





  15. #45

    Re: Reef Ball updates. MBMP

    Quote Originally Posted by Lucky_Phill View Post
    I do believe that there is a continuing roll out of Arti Reefs for Queensland.

    $2 mill has been earmarked for a program over 4 years.

    IMO........... that is better than nothing but way too little for a serious program. We splashed $2 mill in little over 12 months and got 6 ( 5 new and 1 extension ) in the MBMP.

    My calculations and proposal is a $5 mill initial first year dollop and then $2 mill a year thereafter. We need ongoing monitoring and this does not come cheap. $500,000 per year.

    Let's not chuck all the $'s at SEQ, but spread it to all population heavy coastal communities.

    Materials of opportunity must be a priority in terms of Bang for Buck.

    Cheers LP
    Phiil. I agree with what you have said about artis. As I have said there is opportunity with the marine infrastructure fund with $50 million for ramps, pontoons, artis etc

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Join us