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1 equipment anchor bolts in pad to accommodate equipment furnished. , <br /> 2 <br /> 3 3.15 GENERAL WATER-TIGHTNESS , <br /> 4 <br /> 5 Water-tightness is required for all concrete and concrete joints on this project. Any leakage <br /> 6 shall be corrected. <br /> 7 ,s 3.16 CONSTRUCTION LOADS ON STRUCTURAL SLABS: <br /> s <br /> 10 If shoring is removed, no construction materials and equipment shall be allowed on ' <br /> 11 structural slabs until the concrete has reached the 28-day compressive strength. All <br /> 12 superimposed construction loads will then be limited to the design load of the slab. <br /> 13 <br /> 14 3.17 NON-SHRINK GROUT , <br /> 15 <br /> 16 Use non-shrink grout to fill sleeves and voids under equipment bases. Grout shall be mixed <br /> 17 and used in accordance with manufacturer's recommendations. Exposed edges shall be ' <br /> 1e smooth, straight and even. <br /> 19 <br /> 20 3.18 ADHESIVE ANCHORS <br /> 21 '22 Install in strict conformance to manufacturer's printed instructions. Do not cut or damage <br /> 23 existing reinforcing bars. <br /> 24 ,25 3.19 TESTING OF TANKS FOR WATER-TIGHTNESS <br /> 26 <br /> 27 All concrete tanks and channels which will later be subjected to hydrostatic pressure shall ' <br /> 28 be tested for water-tightness. The tests shall be made prior to application of waterproofing <br /> 29 coating and prior to backfilling and not before all tank concrete has attained its design <br /> 30 strength. Testing shall consist of filling the tank with clean water to a level of 12 inches <br /> 31 below the top of each tank. Tanks adjacent to the tank being tested shall be empty and dry. ' <br /> 32 Water shall be allowed to stabilize for 12 hours, then the water level shall be measured at <br /> 33 the beginning, middle, and end of a 24-hour test period. Allowable leakage shall not exceed <br /> 34 1/2 percent of the tank contents, with the exception that any visible leakage from any tank ' <br /> 35 shall be corrected. Repair procedure shall be submitted to Engineer for approval. After <br /> 36 repairs are made, the Engineer may require retesting of tanks and/or channels which have <br /> 37 been repaired. <br /> 38 <br /> 39 3.20 TESTING <br /> 40 <br /> 41 A. Three compressive test specimens shall be taken for every 20 cubic yards of concrete placed ' <br /> 42 or for each major placement during the day. The Engineer has the option to direct the <br /> 43 required test specimens to be taken as he deems necessary to insure the concrete meets <br /> 44 the specification. <br /> 4s <br /> as B. Specimens shall be taken, cured, and tested for compressive strength in accordance with <br /> 47 ASTM C31, ASTM C39, and ASTM C172, respectively. <br /> 48 ,as C. Standard age of compressive test shall be 28 days: however, 7 day tests may be used <br /> 50 provided that the relation between the 7 day and 28 day strengths of the concrete is <br /> 51 established by test for the materials and proportions used. , <br /> 52 <br /> CONCRETE <br /> 042894 03100-16 ' <br />