§ 38-102. Specifications for concrete sidewalks, one course.

(a)

Generally. The laying of concrete sidewalks, one (1) course, shall be in accordance with the specifications set out in the following subsections of this section.

(b)

Subgrade; forms; etc. Subgrades shall be true and thoroughly compacted. Forms shall be four (4) inches wide and unyielding. Division plates shall be one-eighth ( 1/8 ) inch thick, five (5) inches wide and five (5) feet long. Sidewalks shall have a slope of one-quarter (¼) inch per foot toward the curb.

(c)

Cement. The cement shall meet the requirements of the current standard specifications for portland cement of the American Society for Testing Materials. A sack containing ninety-four (94) pounds of cement will be considered one (1) cubic foot.

(d)

Fine aggregate. Fine aggregate shall consist of clean, hard, curable, uncoated particles of sand, free from all organic matter. One hundred (100) percent shall pass a one-quarter (¼) inch screen, and ninety-five (95) percent shall be retained on a one hundred (100) mesh screen. It shall be well graded from coarse to fine.

(e)

Coarse aggregate. Coarse aggregate may be broken stone or gravel. The broken stone or gravel shall be clean, hard, durable, uncoated rock. It shall contain no vegetable or other deleterious matter and shall be free from soft, thin, elongated or laminated pieces.

(f)

Proportioning concrete. The concrete shall consist of one (1) part portland cement, two (2) parts fine aggregate, and three (3) parts coarse aggregate. All materials shall be accurately measured in a manner approved by the director of engineering.

(g)

Mixing concrete. The concrete shall be mixed in a bath mixer for at least one (1) minute, and enough clear water added to give a consistency that will meet the requirements of the standard slump test.

(h)

Placing concrete. Freshly mixed concrete shall be placed immediately on the prepared subgrade and shall be struck off and lightly tamped with a straight edge.

(i)

Joints generally. Joints shall be made over five (5) linear feet of the walk by division plates and at right angles to the surface and edge of the walk, and finished with a creaser having a one-quarter-inch turn.

(j)

Finishing. The surface shall be lightly tamped until the air and water have been released and a sufficient amount of mortar brought to the top for finishing. The finishing shall be done with a trowel and a true plane surface made and compacted. All edges shall be finished with an edger having a one-quarter-inch turn. During very hot or dry weather the walk shall be protected by a suitable cover for seven (7) days.

(k)

Expansion joints. Expansion joints in a sidewalk shall be left at intervals of not less than twenty-five (25) feet nor more than fifty (50) feet. The expansion joint shall extend entirely through the sidewalk, vertically, and shall be the equivalent of one-half (½) inch in width for every twenty-five (25) linear feet of sidewalk.

(Ord. No. 268, § 23; Code 1961, § 36-126; Ord. No. 3111-83, § 1)

(Ord. No. 268, § 23; Code 1961, § 36-126; Ord. No. 3111-83, § 1)