(a) Preparation - The surface shall be stripped of all loam, muck, old pavement, organic and other objectionable material. All soft and spongy places shall be removed and shall meet CT DOT Form 817 Article M.02 requirement. Sub-base shall be thoroughly compacted in layers not exceeding six (6) inches in thickness. Material for sidewalk subgrade shall meet the requirement of section M.03.02 for Class C Concrete. (b) Deep Fills - Fills exceeding foot shall be considered deep fills. Deep Fills shall be made with clean fill material free of muck, loam, clay, spongy or perishable material. Fill material shall be spread in layers not exceeding one foot in thickness and each layer thoroughly compacted. The top of all fills shall extend beyond the walk on each side at least one and one-half (1 1/2) feet. Fill material shall be brought to within one (1) foot of finish sub-grade. The final foot of fill shall be made with bank gravel spread in two (2) layers. Each shall be compacted to a six (6) inch depth. Rolling shall be done by a self-propelled roller weighing not less than four (4) ton. Any areas inaccessible to the roller shall be hand-rolled and tamped. The gravel base is to be smooth and true to grade, as shown on the drawings. (c) Wetting -While compacting the sub-base, the material shall be thoroughly wet, and shall be damp when the concrete is deposited but shall show no pools of water...
