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CAST -IN-PLACE CONCRETE Section 03300 15-1207 radius x'/2" deep groover or edging tool. Joints to be clean cut, straight, parallel or square with respect to concrete walk edge. Tool all edges of exposed expansion joints, control joints, walk edges, and wherever concrete walk adjoins other material or vertical surfaces. Saw Cut, 1/8 inch x 1/4 slub thickness: Must be performed within eight hours of completion of finishing. Do not make saw cuts if aggregate separates from cement paste during cutting operations. Prevent marring of surface finish. Fill with flexible sealant. D. Exposed Concrete Surface Finishing (not including top surface of slabs): Remove fins and rough spots immediately following removal of forms from concrete which is to be left exposed. Damaged and irregular surfaces and holes left by form clamps and sleeves shall be patched with grout. Tie wires are to be removed to below exposed surface and holes pointed up with neat cement paste similar to procedure noted under "Patching" below. Removal of tie wires shall extend to distance of 2" below established grade lines. Ends of tie wires shall be cut off flush at all other, unexposed locations. Care shall be taken to match adjacent finishes of exposed concrete surface. After patching, all concrete that is to remain exposed, shall be sacked with a grout mixture of 1 -part cement, 1 1/2- parts fine sand and sufficient water to produce a consistency of thick paint. After first wetting the concrete surface, apply mixture with a brush and immediately float entire surface vigorously using a wood float. Keep damp during periods of hot weather. When set, excess grout shall be scraped from wall with edge of steel trowel, allowed to set for a time, then wiped or rubbed with dry burlap. Entire finishing operation of any area shall be completed on the same day. This treatment shall be carried to 4" below grade, and all patching and sacking shall be done immediately upon removal of the forms. 3.05 CURING A. Concrete in Forms: Keep forms and top on concrete between forms continuously wet until removal of forms. Maintain exposed concrete in wet condition for 14 days following removal of forms. B. Do not subject concrete to design loads until concrete is completely cured, and until concrete has attained its full specified twenty-eight (28) day compressive strength or until twenty-one (21) days after placement, whichever is longer. C. Interior Slabs: shall be cured utilizing Wet Curing Blanket. For slabs utilizing a Moisture Barrier Admixture within the concrete mix, Contractor must confirm with admixture manufacturer, that the Wet Curing Blanket may be omitted. D. Exterior Slabs: Cure utilizing Curing Compound. If applicable, the Contractor shall verify that the approved Curing Compound is compatible with the approved colorant system. Upon completion of job, wash clean per manufacturer's recommendations. E. No Curing Compound shall be applied to areas scheduled to receive resilient track surface including, curbs, ramps, run ways, etc. 3.06 DEFECTIVE CONCRETE A. Determination of defective concrete shall be made by the Architect. His opinion shall be final in identifying areas to be replaced, repaired or patched. 9