Laserfiche WebLink
F-] <br />i <br />TESTING PROCEDURE <br />A. Standard 6 inch x 12 inch cylinders made of concrete for foundations per <br />ASTM C-143. Take from the same batch for each 50 cubic yards or <br />fraction thereof and at least four (4) cylinders from each day's pour. Cure <br />cylinders; one broken at 7 days; one at 14 days, one at 28 clays; 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 Owner. <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-42. <br />If this test shows strength to be below specification, concrete in question <br />shall be removed and replaced without cost to the Owner. Other work <br />damaged by such repair shall be replaced at no cost to the Owner. Patching <br />of test core sites shall be performed by the Contractor. <br />D. Maximum slump shall be 5" 1 1". <br />TIME: Concrete shall be placed within 90 minutes of adding cement and aggregate <br />or within 45 minutes of adding water and admixtures. Maximum time between <br />deliveries in a single pour shall be 30 minutes. Contractor shall keep and file <br />consecutively all concrete delivery slips which shall have date and time of mixing, <br />time of delivery and design mix type indicated. Copies of all delivery slips shall be <br />provided by the Contractor on a monthly basis to the Owner.. <br />