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• <br />4D <br />• <br />I' <br />i <br />PART 3 - TESTING <br />1. SLUMP & cylinder tests shall be made of all structural concrete in footings, <br />beams, columns and floors. <br />1 ?, TESTING PROCEDURE <br />{ A. Standard G inch x 12 inch cylinders made of concrete for foundations Per <br />ASTM C-143. Take from the sante hatch for each 50 cubic yards or <br />t fraction thereof and at least four (4) cylinders from each day's pour. Cure <br />9 <br />cylinders; one broken at 7 days; one at 14 days, one at 28 days, one held in <br />reserve. <br />B. Prepare and mark test cylinders and deliver them to an independent <br />laboratory approved by the owner. Laboratory tests paid for by the <br />Contractor. <br />C." If final cylinder test is below specified minimum strength the owner may <br />require core tests of hardened concrete in place to be made per ASTM C- <br />42. If this test shows strength to be below specification, concrete in <br />question shall be removed and replaced without cost to the Owner. Other <br />work damaged by such repair shall be replaced at no cost to the Owner. <br />t Patching of test core sites shall be performed by the Contractor. <br />D. Maximum slump shall be 5" ± l". <br />3. TIME: Concrete shall be placed within 90 minutes of adding cement and <br />! <br />aggregate or within 45 minutes of adding water and achntxtatres. Maxanlatin time <br />t between deliveries in a single pour shall be 30 minutes. Contractor shall keep and <br />file consecutively all concrete delivery slips which shall have date and tittle of <br />mixing, time of delivery and design inix type indicated. Copics of all delivery <br />slips shall be provided by the Contractor on it monthly basis to the Owner. <br />L- <br />