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<br />PGSF WMVD Storm and Combined Sewer - Construction Package 2 Concrete Repair <br />Project No. 180162 03 01 00 - 7 <br /> <br />B. Two component, high molecular weight, methacrylate resin crack healer/penetrating <br />sealer, non-vapor barrier, specifically designed for broadcast application. <br />1. Sika corporation, Sika Pronto 19 TF. <br />2. Approved equal. <br />2.09 CONCRETE JOINT SEALANT <br />A. Use a polyurethane sealant designed for submerged conditions. <br />B. Manufacturers and Products: <br />1. Sika Corporation, Sikaflex-1a or Sikaflex-2c <br />2. Euclid Chemical Company, Tammsflex NS <br />3. Approved equal. <br />PART 3 EXECUTION <br />3.01 CONCRETE REPAIR <br />A. Comply with manufacturers' written instructions for surface preparation, environmental <br />conditions, product application, and product curing/protection requirements. <br />3.02 EXAMINATION <br />A. Notify Engineer seven days in advance of date when mockup areas of deteriorated <br />concrete and deteriorated reinforcing bars will be cleaned for inspection and initial pull- <br />off tensile bond strength test. <br />1. Use 15-pound chipping and/or bush hammers, abrasive blast, followed by pressure <br />water blasting to remove debris, foreign material, and/or loose concrete from <br />designated areas to be inspected and repaired. Verify depth of surface removal by <br />sounding and pH testing. <br />2. Follow surface preparation by vacuum and low-pressure water blasting to remove <br />loose debris, foreign material, and/or concrete dust from areas to be inspected and <br />repaired. <br />3. Upon completion of surface cleaning, Engineer and Contractor shall observe surfaces <br />and test results. <br />B. Perform visual surveys of the existing structure as Work progresses to detect hazards <br />resulting from concrete repair Work. Notify Engineer of damage prior to making repairs. <br />3.03 PREPARATION <br />A. Ensure that supervisory personnel are on-site when concrete repair work begins and <br />during its progress. <br />B. Protect persons, motor vehicles, surrounding surfaces of structure being repaired, and <br />surrounding buildings and facilities from harm resulting from concrete repair Work. <br />1. Comply with each product manufacturer's written instructions for protections and <br />precautions. Protect against adverse effects of products and procedures on people <br />and adjacent materials, components, and vegetation.