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C~ <br />G. Vibrators shall be operated at each point of placement and a standby vibrator in good working <br />condition shall be kept at the placement site until all concrete is placed. Vibrators shall be used <br />that will maintain at least 9,000 cycles per minute when immersed in the concrete. <br />H. Vibrations shall be used only to minimize honeycomb and accomplish compaction of the <br />concrete, and shall not be used to move concrete from one location to another. Concrete shall not <br />be moved in the forms more than 5 feet. <br />The surface of hazdened concrete on which fresh concrete is to be placed shall be rough, clean, <br />sound, and damp. The hardened surface shat] be cleaned of all laitance, foreign substances, <br />curing compound, washed with clean water, and wetted thoroughly preceding placement of fresh <br />concrete. <br />3.03 CLEANING <br />All form materials and debris resulting from construction shall be disposed of as directed by MANAGER. <br />3.04 CURING <br />A. General: <br />1. Concrete shall be protected from loss of moisture for at least seven (7) days after <br />placement. <br />2. Curing may be accomplished with water or a curing compound. <br />3. Water or curing compound shall be applied to formed surfaces within one (1) hour of <br />form stripping. <br />• <br />B. Water Curing: <br />Water saturation of unformed surfaces shall begin as quickly as possible after initial set <br />of the concrete. <br />2. The rate of water application shall be regulated to provide complete surface coverage <br />with a minimum of runoff. <br />Concrete surfaces shall not be permitted to become dry during the curing period. <br />C. Curing Compound: <br />Curing compound shall be sprny-applied at the MANUFACTURER'S recommended <br />coverage rate. <br />2. Unformed surfaces shall be covered within thirty (30) minutes after fmal fmishing. <br />Curing compound shall be protected against abrasion during the curing period. <br />3.05 SCHEDULES <br />CONTRACTOR shall notify MANAGER at Least forty-eight (48) hours before each concrete placement. <br />3.06 FIELD QUALITY CONTROL <br />• A. Concrete testing will be performed by CONTRACTOR. <br />Section 03300 Page 3 of 4 <br />Cast-In-Place Concrete Golder Associates <br />c~omxzo3waamcrx'rneroeonnaredoswrr~maooaa.roc <br />Mazch 22, 2000 <br />Revision 4 <br />