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CONCRETE MASONRY UNIT <br />Section 04300 <br />15-1207 <br />C. Compressive strength of grout at 28 days shall be not less than 2000 psi with 6 sacks <br />cement minimum per cubic yard. See structural drawings for specified grout strength. Grout <br />slump to be 8" to 11 ", W/C equal to or greater than 0.7. No water reducing admixtures will be <br />approved. <br />D. Thoroughly mix grout ingredients in quantities needed for immediate use. <br />E. Mix shall contain specified grout admixtures in accordance with manufacturer's instructions: <br />1. SikaGrout Aid to be added at a rate of 1 Ib. per 100 Ib. of cementitious materials per <br />manufacturer's recommendations <br />2. Provide for uniformity of mix. Regardless of whether grout is job -mixed or plant -mixed, <br />admixture shall be added per manufacturer's requirements. Admixture must be <br />combined with water to form a slurry which is then added to the mix in order to avoid <br />"balling" and to get proper distribution of the admixture within the mix. <br />F. Do not use anti -freeze compounds to lower the freezing point of grout. <br />G. Grout shall not be used more than 90 minutes after initial mixing water has been added to dry <br />ingredients at the jobsite. <br />PART 3 - EXECUTION <br />3.01 EXAMINATION <br />A. Verify that field conditions are acceptable and are ready to receive work: <br />1. That foundation surface is level to permit the initial bed joint within a range of % to 1 <br />inch. <br />2. That edge is true to line to permit projection of masonry to less than % inch. <br />3. That projecting dowels are free from loose scale, dirt, concrete or other bond -inhibiting <br />substances. <br />B. Verify items provided by other Sections of work are properly sized and located. <br />C. Verify that built-in items are in proper location, and ready for roughing into masonry work. <br />D. Beginning of installation means installer accepts existing conditions. <br />3.02 PREPARATION AND PROTECTION <br />A. Direct and coordinate placement of metal anchors supplied to other Sections. <br />B. Provide temporary bracing during installation of masonry work. Maintain in place until <br />building structure provides permanent bracing. <br />C. If rain is anticipated, cover the top of incomplete CMU construction as required to prevent the <br />�7 <br />