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(SOME ADMIXTURES ARE INCOMPATIBLE IN CERTAIN CONDITIONS, FOR <br />EXAMPLE~ CALCIUM CHLORIDE. OFTEN ADDED IN COLD WEATHER IT AFFECTS <br />COLORED CONCRETE. IN SOME APPLICATIONS CHLORIDES ARE PROHIBITED.] <br />G. Check concrete within 24 hours of placement for <br />flatness, levelneas, and other specified tolerances. Adjust <br />formwork and placement techniques on aubsequent pours to <br />achieve specified tolerances. <br />03410 STRUCTURAL PRECAST CONCRETE <br />A. Attendance at a pre-fabrication conference in <br />accordance with the waste Management Plan and Section 01200 <br />Project Meetinga is a requirement of this section. <br />B, store materials in a safe, dry, above ground location. <br />C. Prevent contact with material that may cause <br />corrosion, discoloration, or staining. <br />D. set aside, sort, and protect substandard and damaged <br />precast concrete products. Provide for delivery to or <br />collection by alternative end user, e.g., for secondary use <br />as foot bridges or stream bank reinforcement. <br />[ACC (AUTOCLAVED CELLULAR CONCRETE) IS ENTERING THE U.S. MARKET. <br />IT IS A LIGHTWEIGHT STRUCTURAL MATERIAL WITH GOOD INSULATING <br />VALUES. IT MAY PROVIDE ON-SITE WASTE REDUCTION OPPORTUNITIES <br />BECAUSE OF IT5 WORKABILITY.] <br />END OF DIVISION <br />