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THE CITY OF SUNNY ISLES BEACH <br />PROJECT NO. 21-1011 <br />BUILDING DEPARTMENT RELOCATION TO ANNEX <br /> <br />Project No. 21-1011 November 2024 035300 Concrete Floor Topping-4 <br />not allow Everbond slurry mix to dry or puddle. The saturated surface damp (SSD) <br />condition is best achieved by soaking the substrate for 12 hours and just prior to the <br />placement of concrete topping. <br />B. Over Plastic Concrete: Place the concrete and strike off using a vibratory screed. Fill float <br />(bull float) immediately after strike off and before bleed water appears. After concrete <br />bleed water has dissipated, darby or jitterbug surface to produce a mortar bed <br />approximately 1/4 inch (6 mm) thick, measured from the top of the coarse aggregate. <br />Using a tine bow rake, lightly score the concrete surface at right angles to a depth of <br />approximately 1/8 inch (3 mm). (Caution shall be taken to not disturb coarse aggregate.) <br />Raise the strike-off level of the vibratory screed to the specified final elevation of the <br />concrete floor. The vibratory screed should be operating at approximately 1/4 speed. <br />Place the freshly mixed emery concrete topping on the surface of the concrete <br />immediately ahead of the vibratory screed. Care should be taken not to exceed the <br />screed's capacity. The concrete topping should be approximately 1/8 inch (3 mm) above <br />the bottom of the screed. Strike off the concrete topping with the vibratory screed. <br />C. Use finishing machines to compact surface by a third mechanical floating if time and <br />setting characteristics will allow. Use L&M E-CON to reduce plastic shrinkage cracks. <br />D. As surface further stiffens, hand or mechanically trowel with raised blades to produce a <br />dense, hard, wearing surface. <br />3.5 CURING <br />A. Application Over Pre-Set Concrete: Wet cure concrete topping for seven days, covering <br />the slab with concrete curing cover materials or curing blankets. After seven days, <br />remove cover curing, allow to dry and then continue curing with two coats of high solids, <br />ASTM-C-1315 conforming L&M DRESS & SEAL WB 30 curing and sealing compound. <br />Apply second coat immediately after the first coat has dried to touch, at right angles. <br />Allow sealer to dry before opening to traffic. <br />B. Application over Plastic Concrete: Cure with two coats of high solids, ASTM-C-1315 <br />conforming L&M DRESS & SEAL WB 30 curing and sealing compound. Apply second coat <br />immediately after the first coat has dried to touch, at right angles. Allow sealer to dry <br />before opening to traffic. <br />3.6 CONTROL JOINTS <br />A. Saw cut control joints as soon as the surface permits the weight of the saw without <br />causing topping edges to ravel. If the topping is placed over pre-concrete cut the joints <br />through the topping and into the joints of the substrate concrete. <br />B. After concrete has fully cured, fill joint wells with JOINT TITE 750, a two-component, <br />polyurea control joint filler, according to manufacturer's recommendations. <br />3.7 PROTECTION <br />A. Cover floors and keep free of traffic and loads for a minimum of seven days after <br />placement of heavy-duty concrete topping <br /> <br />END OF SECTION