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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> SECTION 07 16 16—APPLIED CRYSTALLINE WATERPROOFING <br /> 1) 24 MPa (3480 psi)@ 24 hrs. <br /> 2) 30 MPa (4351 psi)@ 7 days. <br /> 3) 35 MPa(5076 psi)@ 28 days <br /> 4) 40 MPa(5801 psi)@ 56 days. <br /> C. Pull off Strength (ASTM C1583): 2.8 MPA(400 psi). <br /> d. Acceptable Product:As recommended by the manufacturer. <br /> PART 3 - EXECUTION <br /> 3.1 EXAMINATION <br /> A. Verify that concrete surfaces are sound and clean, and that form release agents and materials used to cure the <br /> concrete are removed prior to applying waterproofing treatment. <br /> B. Examine surfaces that are to receive waterproofing treatment for formwork tie holes and structural defects such as <br /> honeycombing, rock pockets,faulty construction joints and cracks. <br /> 3.2 PREPARATION <br /> A. Concrete surfaces must be clean and free of paint, sealers,form release agents, curing compounds,dirt, laitance or <br /> any other contaminates. <br /> B. Provide minimum ICRI CSP 1 surface profile using sandblasting, high pressure water blasting (minimum 3,000 psi), <br /> scarifying, shot blasting or other method of mechanical surface preparation to remove loose concrete and surface <br /> contaminates. <br /> C. Repair leaking cracks or joints in accordance with manufacturer's written instructions and as follows: <br /> 1. Chase the length of joints and cracks. Provide rectangular-shaped chase that is 40 mm (1.5 inch)deep x 25 <br /> mm (1 inch)wide. <br /> 2. Use water stop plug to stop water leakage. <br /> 3. Use repair grout to completely fill the chase flush with adjacent surfaces. <br /> D. Repair form-tie holes, rock pockets, honeycombing, and other concrete defects in accordance with manufacturer's <br /> written instructions and as follows: <br /> 1. Rout out defective areas to sound concrete. Leave edges square, do not featheredge. <br /> 2. Remove loose material and saturate with water. <br /> 3. If defect is actively leaking, install water stop plug to a maximum depth of 1/3 of the defect. <br /> 4. Fill defect with repair grout. <br /> 3.3 INSTALLATION <br /> A. Saturate the surface by high pressure water blasting. Remove all standing water so the surface is saturated-su rface- <br /> dry(SSD)condition. <br /> B. Apply crystalline waterproofing uniformly to concrete surfaces to manufacturers written instructions. <br /> C. First Coat of Waterproofing Treatment: <br /> 1. Coverage:Apply 0.8 kg/m2 (1.5 lb./sq. yd.). <br /> 2. Push coating into any voids in the concrete surface to ensure a good bond. <br /> D. Second Coat of Waterproofing Treatment: <br /> 1. The second coat can be applied as soon as the first coat has set hard, usually 6-24 hours depending on <br /> conditions. <br /> 2. Wash and rinse the hardened first coat to remove surface bloom before applying second coat. <br /> 3. Some exposed aggregate in the first coat is ideal. <br /> 4. Ensure the hardened first coat is damp(SSD). <br /> 5. Install second coat by following the same procedure used to install first coat. <br /> E. Each coat will be approximately 1 mm to 1.5 mm thick. <br /> F. Curing: <br /> ©BOOMERANG DESIGN#1835 07 16 16-3 510 Meadowlands Drive,Hillsborough, NC <br /> ORANGE COUNTY,NC 12/07/18 <br />