The concrete street surface shall comply with the following minimum requirements.
(A) Subgrade shall be cut not less than four inches below finished grade and brought to a uniform grade the same as if the pavement was to be placed on this grade. This grade shall be compacted to a 95 density or by any method suitable to the City Inspector. Then four inches of blow sand or an approved material shall be placed on the grade and spread to a true grade as shown on plans. Final dressing of sand shall be made between the forms set for concrete pavement and the subgrade shall be checked with an approved template. The sand shall be thoroughly wetted immediately before any concrete is placed on the subgrade. Any irregularity or misplacement caused by tracks of mud buggies or trucks shall be kept smooth by floats or other approved methods before concrete is poured. Subgrade shall be kept immediately before the concrete is placed.
(B) All concrete slabs shall have reinforcement of not less than number six wire mesh.
(C) The concrete shall consist of a wearing course composed of Portland cement concrete constructed in one course on the prepared subgrade or on the completed and accepted base with these specifications in conformity with the lines, grades, and thickness shown on the plan. The thickness of the concrete shall not be less than six inches. Concrete shall be made of approved materials and shall be mixed by an approved mixer not less than one and one-half minutes after all materials have reached the mixer drum. Sufficient water shall be used to make a workable mix. Under no condition shall the mixer water exceed six and one-half gallons per bag of cement, including moisture contained in material. The course aggregated shall be kept wet in hot weather. Concrete shall have a content weight of 3,500 pounds per cubic yard, but shall not have a strength less than 3,000 pounds in 28 days.
(D) Curing concrete shall be obtained by burlap or cotton mates or with white or red pigment membrane curing compound.
(E) Joints will be sawed one inch in depth and will be filled with joint filler. The joint filler shall be of such character and type that it will not be deformed by ordinary handling during the hot summer months or become hard and brittle in cold weather. Expansion joints shall be placed every 300 feet.
(Prior Code, § 97.41)