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3. Transverse Expansion Joints: One half-inch expansion joints shall be <br />formed by placing preformed joint filler topped with joint sealant at the ends <br />of each radius return, around all structures, and at intervals specified in <br />3.03 D4 below and as shown on the DRAWINGS. <br />4. Spacing of transverse contraction and expansion joints. <br />Walk,Slab Width Contraction Joint Expansion Joint <br />Spacinq Spacing <br />4' 4' 40' <br />5' 5' 40' <br />6' 6' 42' <br />8' 8' 40' <br />10' 10' 40' <br />Provide isolation joints between slabs on grade and sidewalks adjacent to <br />fixed objects including curbs, inlets, etc. <br />E. Finishing <br />1. Strike off the concrete by means of a wood or metal screed used <br />perpendicular to the forms in order to obtain the required grade, and <br />remove surplus water and laitance. <br />2. Broom -finish the concrete surface. The surface variations shall not be <br />more than 1/4 inch under a 10400t straight edge. Carefully finish the edge <br />of the slabs on grade and sidewalk with an edging tool having a radius of <br />1/2 inch. <br />F. Curing: <br />1. After the finishing operations have been completed and as soon as the <br />concrete has hardened sufficiently that marring of the surface will not occur, <br />the entire surface and the edges of the newly placed concrete shall be <br />covered and cured with membrane curing compound. <br />2. Curing compound shall be uniformly applied to the surfaces to be cured, in <br />a single coat, continuous film, at the rate of one gallon to not more than 200 <br />square feet, by a mechanical sprayer. <br />3. Curing compound shall not be applied during periods of rainfall. Curing <br />compound shall not be applied to the inside faces of joints to be sealed. <br />Should the film become damaged from any cause within the required curing <br />period, the damaged portions shall be repaired immediately with additional <br />compound. Upon removal of side forms the sides of the slabs exposed <br />shall immediately be coated to provide a curing treatment equal to that <br />provided for the surface. <br />G. Backfilling and Compacting: After the concrete has set sufficiently, refill the spaces <br />adjacent to the concrete to the required elevation with suitable material. Place and <br />thoroughly compact to 98 percent of the maximum density as determined by AASHTO T- <br />180. <br />024404 02440 — Concrete Driveways, etc... <br />