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ECS Pacific, Inc. <br />Project No. 81:1145 <br /> <br />City of Santa Ana Public Library Renovation <br />26 Civic Center Plaza <br />Santa Ana, California 92701 <br /> <br />COLD FLUID-APPLIED WATERPROOFING <br /> <br />07 1416 - 9 <br /> <br /> <br />3.4 PREPARATION OF CONCRETE <br />A. Prepare surface in accordance with manufacturer’s instructions. <br />B. Provide clean, dry, and structurally sound concrete surface. <br />C. Existing Concrete: Remove existing coating. <br />D. Condition Survey: Perform a condition survey of existing concrete in accordance with <br />ACI 201.1R. <br />E. Abrasive Blasting, mechanical methods: <br />1. Prepare concrete, concrete block surfaces to receive fluid-applied waterproofing <br />by abrasive blasting, or mechanical methods. <br />2. Remove dirt, soil, grease, oil, paint, coatings, form release agents, curing <br />compounds, laitance, loose material, unsound concrete, and other foreign <br />materials that would inhibit performance of fluid-applied waterproofing in <br />accordance with ASTM D4258 and by abrasive blasting. <br />3. Obtain a firm, sound concrete surface in which bug holes are fully opened or <br />repaired. <br />4. Remove sharp concrete edges and projections. <br />5. Perform abrasive blasting in accordance with ASTM D4259-88. <br />6. Receive approval by Architect of blasting media. <br />7. Maintain air supply for abrasive blasting free of oil and water in accordance with <br />ASTM D4285. <br />8. Expose aggregate to obtain a profile of ICRI CSP 4 to 6 in accordance with ICRI <br />03732. <br />F. Repair concrete surface to be free of holes. Fully open bug holes before repair. <br />Repair defects in the concrete surface, such as bug holes, air pockets, and honeycomb <br />by filling and smoothing off with patching material, epoxy patching compound, or grout. <br />Abrasive blast repaired surfaces. <br />G. Ensure substrate is clean and dry in accordance with manufacturer’s instructions. <br />Remove surface laitance from concrete surface to expose aggregate to obtain a profile <br />of ICRI CSP 4 to 6 in accordance with ICRI 03732. <br />H. Repair cracks in concrete surface with material suitable for type and width of crack, <br />compatible with substrate and fluid-applied waterproofing, and approved by the <br />Architect or Engineer. <br />I. Moisture Tests: Do not apply primer or fluid-applied waterproofing to concrete surface <br />unless two or more of the flowing moisture tests confirm appropriate moisture levels for <br />properly prepared substrates: <br />1. Plastic Sheet Method (ASTM D4263): Pass/Fail. <br />2. Relative Humidity Test: Less than 75% relative humidity at 70° F. <br />3. Calcium Chloride Test: Less than 5 pounds per 1,000 square feet per 24 hours. <br />4. Radio Frequency Test: Less than 5% moisture. <br />3.5 PREPARATION AT TERMINATIONS, PENETRATIONS, AND CORNERS <br />A. Prepare surfaces at terminations and penetrations through waterproofing and at <br />corners and penetrations in accordance with waterproofing manufacturer's written