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�J [i u B. Base Course Material: 1. Base course material shall be graded aggregate conforming to the FDOT. PART 3 - EXECUTION 3.01 INSTALLATION A. Sub -grade shall be thoroughly compacted as specified in Division 2. B. Forms shall conform to the shapes, lines and dimensions of the members as called for on the plans and shall be substantial and sufficiently tight to prevent leakage of mortar. They shall be properly braced or tied together so as to maintain position and shape. C. Finishing: 1. Float concrete until 1/4 -inch cement gel is brought to surface, steel trowel until dense surface is obtained. 2. Finish with broom at right angles to alignment of work, then round all exterior edges with 3/4 -inch radius after brooming. D. Curing: 1. Cover walks with sand, sawdust or shavings and keep wet for three (3) days. 2. Cover walks until final clean -up to prevent damages. 3. Other methods of curing may be used subject to approval of the Engineer prior to implementation. E. Concrete walks shall be constructed to lines, widths, grades and thickness as shown on the Drawings, but sloped not less than 1/8 -inch per foot in direction of water flow. Concrete shall be placed on thoroughly compacted subgrade, having smooth surface and kept moist until time concrete is placed. 1. Isolation joints shall be installed at all intersections with other walks, at head and bottom of steps, curbs and maximum 12 -foot O.C. in runs. Expansion material shall be 1/2 -inch thick, but not less than 1/4 -inch, by depth of concrete; 3/4 -inch thick were abutting curbs and gutters, and at parking bays. Expansion material shall extend from bottom of walk slab to within 1/2 -inch of top, to be filled with poured joint filler. 2. Dummy groves shall be 1/2 -inch x 1/2 -inch having 1/2 -inch aprons. F. Local conditions, codes and practices shall govern all drive cuts and aprons. December 2006 02510 -2 06 -5723