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Grout shall not be placed during freezing weather unless adequate protection is provided. <br /> 3.03 CEMENT GROUT <br /> Cement grout shall be used for filling nonbearing portions of equipment pads and for pressure <br /> grouting. <br /> Except for the specialized equipment for pressure grouting, mixing and placing apparatus shall be <br /> similar to that normally used for cast-in-place concrete. Grout shall be mixed for a period of at least <br /> 1 minute. Diluted grout shall be agitated to keep ingredients mixed. <br /> 3.04 NONSHRINK GROUT <br /> Nonshrink, nonmetallic aggregate grout shall be used for the bearing surfaces of machinery and <br /> equipment bases, column base plates and bearing plates. Nonshrink metallic aggregate grout shall <br /> be used for setting anchor bolts and grouting reinforcing steel holes. Grout shall meet the <br /> requirements of CRD-C621 and shall be placed in accordance with manufacturer's instructions. <br /> Holes required for grouting shall be blown clean with compressed air and left free of dust or <br /> standing water. Horizontal holes for grouting shall be drilled at a slight downward angle to facilitate <br /> holding the grout until setting is complete. Bolts or reinforcing steel installed in horizontal grout <br /> holes shall be bent slightly accordingly. <br /> 3.05 EPDXY GROUT <br /> Epoxy grout shall be used for repairing cracks by pressure grouting or gravity flow, repairing <br /> structural concrete, and may be used for setting reinforcing dowels or anchor bolts into holes for <br /> grouting. Concrete shall be primed in accordance with the grout manufacturer's instructions. <br /> Use of epoxy grout for anchorage of bolts or reinforcing dowels shall be subject to the following <br /> conditions: <br /> 1. Use shall bei limited to locations where exposure, on an intermittent or continuous <br /> basis, to acid concentrations higher than 10 percent, to chlorine gas, or to machine <br /> or diesel oils, is extremely unlikely. <br /> 2. Use shall be limited to applications where exposure to fire or exposure to concrete <br /> or rod temperature above the product's heat deflection temperature or 120 degrees <br /> F (whichever is less) is extremely unlikely. Overhead applications (such as pipe <br /> supports) because of the above concerns, shall be disallowed. <br /> 3. Approval frorn Engineer for specific application and from supplier of equipment to <br /> be anchored, if applicable. <br /> 4. Anchor diameter and grade of steel shall be per contract documents or per <br /> equipment supplier specifications. Anchor shall be threaded or deformed full length <br /> of embedment and shall be free of rust, scale, grease, and oils. <br /> 5. Embedment depth and hole diameter shall be as specified. <br /> 6. Holes shall have rough surfaces, such as can be achieved using a rotary <br /> percussion drill. <br /> July 2007 Division III-94 NEI Phase II Water and Sewer <br /> CIP Nos. 7468, 7589, 7590 <br />