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INDIAN RIVER COUNTY JULY 25, 2014 <br />INTERGENERATIONAL RECREATION CENTER 100% CONSTRUCTION DOCUMENTS <br />2.9 BEARING PADS <br />A. Elastomeric Pads: AASHTO M 251, plain, vulcanized, 100 percent polychloroprene (neoprene) <br />elastomer, molded to size or cut from a molded sheet; Type A Shore durometer hardness of 50 <br />to 70, ASTM D 2240; and minimum tensile strength 2250 psi , ASTM D 412. <br />2.10 GROUT <br />Nonmetallic, Nonshrink Grout: Premixed, nonmetallic, noncorrosive, nonstaining grout <br />containing selected silica sands, portland cement, shrinkage -compensating agents, and <br />plasticizing and water -reducing agents; complying with ASTM C 1107, of consistency suitable <br />for application. <br />2.11 MISCELLANEOUS MATERIALS <br />A. Dovetail Anchor Slots: Hot -dip galvanized steel sheet, not less than 0.0336 inch thick, with bent <br />tab anchors. Temporarily fill or cover face opening of slots to prevent intrusion of concrete or <br />debris. <br />2.12 REPAIR MATERIALS <br />A. Bonding Agent: ASTM C 1059, Type II, nonredispersible, acrylic emulsion or styrene <br />butadiene. <br />B. Patching Mortar: Dry -pack mix consisting of 1 part portland cement to 2-1/2 parts fine <br />aggregate passing No. 16 sieve, using only enough water for handling and placing. <br />2.13 CONCRETE MIXTURES <br />A. Prepare design mixtures for each type and strength of concrete, proportioned on basis of <br />laboratory trial mixture or field test data, or both, according to ACI 301. <br />1. Use a qualified independent testing agency for preparing and reporting proposed <br />concrete design mixtures based on laboratory trial mixtures. <br />B. Proportion concrete mixture as follows <br />1. Minimum Compressive Strength: 4000 psi at 28 days. <br />2. Maximum Water-Cementitious Materials Ratio: 0.45. <br />3. Slump Limit: 5 inches, plus or minus 1 inch . <br />4. Cementitious Materials: Limit percentage, by weight, of cementitious materials other than <br />portland cement in concrete according to ACI 301 requirements. <br />C. Limit water-soluble chloride -ion content in hardened concrete to 0.15 percent by weight of <br />cement. <br />D. Admixtures: Use admixtures according to manufacturer's written instructions. <br />1. Use water -reducing admixture in concrete, as required, for placement and workability. <br />TILT -UP CONCRETE 034000 - 7 <br />