Opening of Quotes - East Race Sidewalk Repair Proj No. 117-130 - Walsh & Kelly, Inc.

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Version 10/31/2017 Page - 13 Public Works Quote CONSTRUCTION METHODS: Inspection: A. Examine areas and conditions under which the repair Work is to be installed and notify ENGINEER in writing of conditions detrimental to proper and timely completion of the Work. Do not proceed with the Work until unsatisfactory conditions have been corrected. B. Engineer will inspect all surfaces and determine initial location and extents of all concrete repairs and rehabilitations. Contractor shall coordinate with Engineer with regard to scheduling inspections. Inspections will be conducted after the area is dewatered by the Contractor. The Contractor shall coordinate with the South Bend Parks and Recreation Department to shut the head gates on the East Race to dewater. Preparation: A. Surface Preparation: 1. Initial Surface Preparation: Remove by handchipping, abrasive blasting, or hydro blasting all laitance, foreign material, and unsound concrete from entire area to be repaired. Further roughen surface as specified in this Section. Where non-shrink grout or repair mortar is used, perform additional surface preparation, if any, recommended by product manufacturer. 2. Wetting Procedure: Where repair concrete, shotcrete, or cement grout is used, and bonding agent is not required, or where repair mortar or non-shrink grout manufacturer recommends wet or saturated surface, perform the following: a. Continuously apply water for at least four hours to surface being repaired. Where large surface areas are to be repaired, use fog-spray nozzles, mounted on stands, in sufficient number so that entire surface to be repaired is contacted by fog spray cloud. b. Prevent concrete from drying until after repair is completed. Re-wet surfaces not yet repaired using water sprays at least daily; should more than four days elapse without re-wetting surfaces not yet repaired, repeat the original saturating procedure. c. Remove standing water in areas to be repaired before placing repair material. Provide means to remove excess water from structure. 3. Preparation for Epoxy Bonding Agent: Where repair material manufacturer recommends use of epoxy-bonding agent, conform to recommendations of both repair material manufacturer and bonding agent manufacturer. Installation, General: A. Care shall be taken to fully consolidate repair material, completely filling all portions of space to be filled. B. Bring surface being repaired into alignment with adjacent surfaces, providing uniform, even surface. Surface repair shall match adjacent existing surfaces in texture and shall receive coatings or surface treatments, if any, provided for the existing surface adjacent to repaired surface. C. Curing: 1. Curing of repair mortar and non-shrink grout shall be in accordance with manufacturer’s recommendations, except that minimum cure period shall be three days. 2. Curing of other materials shall be in accordance with requirements of Section XVII. Concrete 4” Sidewalk. Repair of Surface Defects: A. Surface defects are depressions in a concrete surface that do not extend all the way through the concrete. Surface defects can result from removal of an embedded item, removal of an intersecting concrete member, physical damage, or unrepaired rock pockets created during original placement. For spalls that result from corroded reinforcing steel or other embedment refer to REPAIR OF DETERIORATED CONCRETE in Work Item.