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PGSF WMVD Storm and Combined Sewer - Construction Package 2 Cast-in-Place Concrete <br />Project No. 180162 03 30 00 - 11 <br /> <br />4. Shrinkage: <br />a. Liquid containing structures using Class C-1 concrete mix are intended to be <br />watertight. Provide test results for Class C-1 concrete mix meeting the following <br />requirement: drying shrinkage limit of 0.038 percent in the laboratory at 35-days <br />(7-days moist cure and 28-days drying) as tested in accordance with ASTM C157 <br />and the following modifications: <br />1) Wet cure specimens for a period of 7-days (including the period of time the <br />specimens are in the mold). Wet cure may be achieved either through storage <br />in a moist cabinet or room in accordance with ASTM C 511, or through <br />storage in lime saturated water. <br />2) Slump of concrete for testing shall match job requirements and need not be <br />limited to restrictions as stated in ASTM C 157 section 8.4. <br />3) Report results in accordance with ASTM C 157 at 0, 7, 14 & 28-days of <br />drying. <br />b. Concrete shall not be placed in the field prior to acceptance of the concrete mix. <br />To meet the drying shrinkage limit, it is recommended that a shrinkage reducing <br />admixture be considered for use in concrete for liquid containing structures. <br />2.03 WATERSTOPS <br />A. Polyvinyl Chloride (PVC): <br />1. Manufacture PVC waterstops from virgin polyvinyl chloride conforming to the Corps of <br />Engineers Specification No. CRD-C572. <br />2. Use 6-inch by 3/8-inch ribbed flat ribbed with center bulb waterstop in construction <br />joints. Acceptable products include: Greenstreak Group, Inc. “Model 679” “Model <br />705”; Vinylex Waterstops and Accessories “Model R638”, “Model RB6-38; or <br />approved equal. <br />3. Use 9 inch by 3/8-inch ribbed with center bulb waterstop in expansion joints. <br />Acceptable products include: Greenstreak Group, Inc. “Model 696”; Vinylex <br />Waterstops and Accessories Model “RLB9-38”; or approved equal. <br />4. Use molded crosses, tees, and other shapes for changes of direction, intersections, <br />and transitions or cut and splice as recommended by manufacturer. <br />B. Retro-Fit: <br />1. Use “Tee” or “L” shape as indicated with epoxy adhesive, stainless steel batten <br />strips, and stainless steel adhesive anchors. Acceptable products include: <br />Greenstreak Group, Inc Model “667” or approved equal. <br />C. Expanding (Hydrophilic) Waterstops: <br />1. Bentonite-free, made from unvulcanized rubber. Acceptable products include: Adeka <br />Corporation “Ultra Seal MC-2010MN with P-201 adhesive/sealant”; Greenstreak <br />Group, Inc. “Hydrotite CJ-1020-2K with Leakmaster LV-1 adhesive/sealant”; or <br />approved equal. These are allowable for use only where indicated on the drawings or <br />accepted in writing by Engineer. Provide adhesive/sealant approved by <br />manufacturer plus concrete nails and fender washers to secure waterstop material <br />in-place during concrete placement. The waterstop MUST be placed between two <br />mats or curtains of steel reinforcement with minimum 3-inches concrete cover. <br />2. For limited cover applications or where only one mat or curtain of reinforcement is <br />present, use Adeka Corporation “Ultra Seal KBA-1510FP”or approved equal.