The successful bidder will be required to provide all necessary labor, materials, equipment, supervision and transportation to perform new concrete installations, concrete replacements and concrete curb replacements in accordance with these specifications. C. In areas designated by the Facilities Department, all existing concrete shall be removed. All debris including reinforcing wire and broken concrete shall be removed from the job site by the contractor. It is important that sidewalk blocks be removed at expansion or scored joints. Scored joints should be carefully sawed so that the new cast-in-place concrete establishes a smooth transition to existing sidewalks and curbs. Removed and crushed concrete is not permitted to be used as a stone base. D. All voids or soil erosion found after removal of deteriorated concrete must be filled in with No. 2A crushed stone and compacted to provide a firm foundation for the new concrete. A minimum of 4” of 2A crushed stone is to be used as a sub-base. E. All forms used shall be a minimum 4” and of a uniform width for sidewalks. All sidewalks shall be the same width as existing. Provide form materials with sufficient stability to withstand pressure of placed concrete without bow or deflection. F. Joint fillers for expansion joints shall be asphalt impregnated pre-molded type. Expansion joints required in all areas will be placed prior to pouring. G. Reinforcing wire shall be a minimum of #10 gauge – 6” x 6” mesh for all sidewalk replacement. Install welded wire fabric in as long of length as practicable, lapping at least one mesh.
