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� ' <br /> ' <br /> ' Repair finished unformed surfaces that contain defects which affect durability of <br /> concrete. Surface defects, as such, include crazing, cracks in excess of 0.01" wide or <br /> which penetrate to reinforcement or completely through non-reinForced• sections <br /> ' regardless of width, spalling, pop-outs, honeycomb, rock pockets, and other objectionable <br /> conditions. <br /> Correct hi�h areas in unformed surfaces by grinding, after concrete has cured at least 14 <br /> ' days. <br /> Correct low areas in unformed surfaces during, or immediately after completion of <br /> ' surface finishing operations by cutting out low areas and replacing with fresh concrete. <br /> Finish repaired areas to blend into adjacent concrete. Proprietary patchin� compounds <br /> may be used when acceptable to Architect. <br /> ' Renair defective areas, except random cracks and single holes not exceeding 1" <br /> diameter, by cutting out and replacing with fresh conerete. Remove defective areas to <br /> sound concrete with clean, square cuts and expose reinforcing steel with at least 3/4" <br /> � • clearance all around. Dampen concrete surfaces in contact with patchi�g concrete and <br /> apply bonding compound. Mix patching concrete of same materials to provide concrete <br /> of same type or class as original concrete. Place, compact, and finish to blend with <br /> adjacent finished concrete. Cure in the same manner as adjacent concrete. <br /> ' Repair isolated random cracks and sinRle holes not over l" i <br /> method. Groove top of cracks and cut-out holes to sound concrete and clean of ust,�irt <br /> ' and loose particles. Dampen cleaned concrete surfaces and apply bonding compound. <br /> Mix dry-pack, consisting of one part portland cement to 2-1/2 parts fine aggregate <br /> passing a No. 16 mesh sieve, using only enough water as required for handling and <br /> placing. Compact dry-pack mixture in place and finish to match adjacent concrete. <br /> � Keep patched area continuously moist for not less than 72 hours. <br /> Repair. methods not specified above may be used, subject to acceptance of Architect. <br /> � 3.�t90UALITY CONTROL TESTING DURING CONSTRUCTION: <br /> The Contractor will employ a testing laboratory to perform other tests and to submit <br /> ' test reports. <br /> Sampling and testing for quality contro! durin� placement of concrete may include the <br /> , following, as directed by Architect. <br /> Samplin� Fresh Concrete: ASTM C 172, except modified for slump to comply with ASTM <br /> ' C 94. <br /> Slump:' ASTM C 143; one test at point of discharge for each day's pour of each <br /> type of concrete; additional tests when concrete consistency seems to have <br /> , changed. <br /> , . <br /> CONCRETE WORK 03310 -11 <br /> ' <br /> ' <br />