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12 CONCRETE FINISHES <br /> 12.1 REPAIRING AND PATCHING SURFACES <br /> Concrete surfaces shall be repaired immediately after form removal in <br /> accordance with the following procedure: <br /> 12.1.1 Holes left by tie rods shall be hammerpacked with stiff, dry <br /> mortar, using the same materials as those in the concrete except <br /> a somewhat leaner mix. <br /> 12.1.2 Honeycombed areas shall be cut out to a depth at which sound <br /> concrete is exposed and filled with concrete. The color shall <br /> match that of the structure. <br /> 12.1.3 Spalled and pitted areas caused by concrete sticking to the forms <br /> during removal shall be chipped back to obtain a good mechanical <br /> bond, undercut at the edges, and repaired with mortar matching <br /> the color of the concrete. <br /> 12.1.4 Throughout the operations of repairing defects and finishing, the <br /> surface shall not be allowed to become dry nor shall the underly- <br /> ing concrete be damaged by the operations. <br /> 12.2 FLOATING <br /> 12.2.1 Floating shall be accomplished with either wood, cork or metal <br /> floats. After the concrete has been properly placed, vibrated and <br /> roughly leveled, it shall be screeded to the proper elevation. All <br /> coarse aggregate shall be tamped below the surface. After <br /> screeding and tamping, the surface shall be made uniform by <br /> means of floats operated with a circular motion. <br /> 12.2.2 After floating, the surface shall be tested for uniformity by use of <br /> a straight edge. Variations from desired finished elevations shall <br /> not exceed one-quarter-inch (%") in ten feet (10') where level or <br /> nearly level surfaces are required. <br /> 12.2.3 Excessive floating shall be avoided. <br /> 12.2.4 Use of neat cement to absorb excessive surface water is prohibit- <br /> ed. <br /> SPEC. B - CONCRETE <br /> PAGE 19 <br />