1565 ORD REGULATING AND CONTROLLING CONSTRUCITON, REPAIRS, ALTERATIONS AND REMOVAL OF CONCRETE SIDEWALKS, ETC

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(d) Expansion Joints; Expansion joint filler shall be premoulded mater- ial, thickness of one-half (1/2) inch, of said character that it will not be deformed or damaged by ordinary handling during hot or cold weather. Material shall be pre-formed bituminous fiber ma- terial, A. S. S. H. O. Designation M59-42, latest revisions or equal. Section IV: Equipment The mixing of concrete shall be done in a ba.tch mixer approved by the City Engineer. Section V: Concrete Mixture For sidewalks the concrete mixture shall be a minimum of 2500 pounds per Square Inch at 28 days (or a 1:2 1/2:5 mix) - curbs, gutters, curb and gutters and driveways shall be a minimum of 3, 000 pounds per Sq. inch at 28 days (or 1:2:4 Mix). The m ixing time for all concrete shall be a minimum of one (1) minute after all ingredients have been placed in the mixer. The maximum slump for concrete for curbs shall be four (4) inches and for gutters, side- walks and driveways, three (3) inches. Section VI: Form s Forms shall be of wood or metal, of a section satiafactory to the City Engineer, straight, free from warp, and of the depth equal to the thickness of the finished product. The forms shall be securely staked to alignment and grade, and maintained in a true position during the depositing of the concrete. Forms shall be clean and oiled before pouring of the concrete. Section VII: Mixing and Placing Before the pouring of any concrete the forms will be checked for align- ment and grade by the City Engineer. The concrete will be placed between the forms to the depth specified, spaded and ta.mped until thoroughly compacted, and the morta,r entirely covers the exposed surface. Expansion joints will be placed where new concrete connects to any old concrete surface or curb. Spacing of expansion joints will be at points not exceeding fifteen (15) feet and will not extend above the final grade of the finished structure. Section VIII: Finishing Finishing shall either be by hand or machine. Hand finishing shall include the floating with a wooden float, the top of the surface until a slight excess of sand appears. On sidewalks, same will be marked off in four (41) foot sections by the use of jointing tool. On curb, gutters, and curb and gutters, a trowel finish will be made, followed by a brush finish. Expansion joints will be cut to the grade of the finished product, and an edger run on both sides. Sidewalks or driveways will not be finished where the surface will be slicko Section IX: Curing An approved curing compound will be applied to the finished product, in accordance with the City Engineer's instructions. Section Xe Sub-grade If the subgrade is composed of either clay or gumbow, a one and one-half (1 1/2) inch sand cushion will be used if, in the opinion of the City Engineer, it is necessary.