Orange County NC Website
Browse       Search
DocuSign Envelope ID:070B6BC7-CDE2-4AO8-BE62-07FA6BFDO53B <br /> 11/20/2020 <br /> a. When frequency of testing will provide fewer than five compressive-strength tests <br /> for each concrete mixture, testing shall be conducted from at least five randomly <br /> selected batches or from each batch if fewer than five are used. <br /> 2. Testing Location: Testing shall be done at the point of placement, unless concrete is <br /> transported to the point of placement by a pump or travels greater than 50' to the point of <br /> placement by any other transportation device (e.g. will barrel, bobcat ...). If the concrete <br /> is transported greater than 50 feet from the concrete truck or is being pumped,testing shall <br /> be done at the point of placement and at the concrete truck. <br /> C. Strength of each concrete mixture will be satisfactory if average of any three consecutive <br /> compressive-strength tests equals or exceeds specified compressive strength and no compressive- <br /> strength test value falls below specified compressive strength by more than 500 psi. <br /> D. Test results shall be reported in writing to Engineer,concrete manufacturer,and Contractor within <br /> 48 hours of testing. Reports of compressive-strength tests shall contain Project identification <br /> name and number, date of concrete placement, name of concrete testing and inspecting agency, <br /> location of concrete batch in Work, design compressive strength at 28 days, concrete mixture <br /> proportions and materials, compressive breaking strength, and type of break for both 7- and 28- <br /> day tests. <br /> E. Nondestructive Testing: Impact hammer, sonoscope, or other nondestructive device may be <br /> permitted by Architect but will not be used as sole basis for approval or rejection of concrete. <br /> F. Additional Tests: Testing and inspecting agency shall make additional tests of concrete when test <br /> results indicate that slump, air entrainment, compressive strengths, or other requirements have <br /> not been met, as directed by Engineer. <br /> G. Concrete paving will be considered defective if it does not pass tests and inspections. <br /> H. Additional testing and inspecting, at Contractor's expense, will be performed to determine <br /> compliance of replaced or additional work with specified requirements. <br /> 1. Prepare test and inspection reports. <br /> 3.11 REPAIR AND PROTECTION <br /> A. Remove and replace concrete paving that is broken,damaged,or defective or that does not comply <br /> with requirements in this Section. Remove work in complete sections from joint to joint unless <br /> otherwise approved by Architect. <br /> B. Protect concrete paving from damage. Exclude traffic from paving for at least 14 days after <br /> placement. When construction traffic is permitted, maintain paving as clean as possible by <br /> removing surface stains and spillage of materials as they occur. <br /> C. Maintain concrete paving free of stains, discoloration, dirt, and other foreign material. Sweep <br /> paving not more than two days before date scheduled for Substantial Completion inspections. <br /> END OF SECTION 32 13 13 <br /> 32 13 13 CONCRETE PAVING Page 11 of 11 <br />