A.
Concrete sidewalks. A concrete sidewalk shall be of the width shown on the construction standards and shall be laid on a foundation five (5) inches thick. The sidewalk shall consist of a single course of concrete five (5) inches thick, except in driveways, where it shall be seven (7) inches thick and reinforced.
(1)
Materials.
(a)
Materials for the foundation shall consist of run-of-bank gravel as specified under § 107-10C, Bank gravel foundation course, of these specifications, or the best grade of steam cinders.
(b)
Concrete shall be one to two to three and one-half (1:2:3 1/2) concrete, mixed in accordance with the requirements of Item 18 of the state specifications, and shall have a minimum twenty-eight-day compressive strength of three thousand (3,000) pounds per square inch.
(c)
All concrete shall have an air entrainment of six percent (6%) to nine percent (9%). Air entrainment shall be obtained by using either air entraining cement conforming to ASTM C-175, latest revision, Type 2A, or by using plain portland cement conforming to ASTM C-150, latest revision, Type 2, and an approved air-entraining admixture. The air-entraining admixture used shall be one approved by the New York State Department of Public Works and must also be approved by the Town Engineer.
(2)
Excavations. Excavation shall be made to dimensions sufficient to permit the setting of forms. The earth subgrade, immediately before the foundation material is placed on it, shall be compacted, smooth, parallel to and the required depth below the finished sidewalk surface. The subgrade shall not be in a muddy or frozen condition, and unsuitable material shall be removed and replaced with acceptable material thoroughly compacted.
(3)
Method of placement.
(a)
Foundation material shall be placed on the prepared subgrade and thoroughly compacted into a course not less than five (5) inches thick. The top surface shall be parallel to the finished grade and at a distance below grade equal to the specified thickness of concrete.
(b)
Forms shall be of substantial materials with suitable metal dividing plates and a sufficient strength to satisfactorily resist distortion when fastened together and secured in place. Forms shall be cleaned of old concrete and thoroughly lubricated. Forms and dividing plates shall be of a depth not less than that of the concrete sidewalk, shall be properly located with tops set to the designated sidewalk surface and shall be left in place until the concrete has hardened.
(c)
Concrete sidewalks shall be built in independent rectangular slabs approximately five (5) feet long and separated by joints approximately one-eighth (1/8) inch wide, or in panels up to sixty (60) feet long where continuous reinforcement is used. Reinforcement shall conform to the requirements of ASTM Designation A-185 and shall weigh not less than forty-two (42) pounds per one hundred (100) square feet. One-half-inch-thick premolded bituminous expansion joint material shall be placed to the full depth of each joint where reinforcement is used. Between these joints the walk shall be scored one (1) inch deep to form five-foot panels.
(d)
The concrete shall be placed within the forms, thoroughly tamped and spaded to fill the forms, and struck off at the finished grade. At driveways, steel fabric reinforcement shall be placed two (2) inches from the top surface. Steel fabric shall be No. 6 gauge wire at six-inch centers transversely and longitudinally, and meeting the requirements of ASTM Specification A-185.
(e)
Sidewalk at a driveway shall be a length to suit the width of the driveway as determined in the field, with the top surface scored at approximately five-foot intervals. One-half-inch premolded bituminous joints shall be placed at the ends of driveway sidewalk.
(f)
The top surface shall be finished to true, smooth planes by troweling and finally by wooden floats. Each rectangular slab shall have edges neatly rounded with proper tools and bounded on all sides by a troweled border about one (1) inch wide.
(g)
Concrete shall be cured by nonstaining quilted covers, or other approved method. Quilted covers shall be held securely in place and weighted down to completely cover the edges, as well as the top, of the sidewalk. Adjoining quilts shall be lapped at least twelve (12) inches. These quilted covers shall be laid directly on the sidewalk as soon as it is completed. They shall be thoroughly wetted and kept wet for at least five (5) days.
B.
Asphalt concrete sidewalks.
(1)
Width and thickness. Asphalt concrete sidewalks shall be of the width and compacted thickness indicated on the construction standards.
(2)
Materials and construction.
(a)
Materials and construction of the foundation course shall conform to the requirements under § 107-10C, Bank gravel foundation course, of these specifications.
(b)
Before the placement of the asphalt concrete top course, the foundation course shall be primed with a medium curing liquid asphalt, Grade MC-1, conforming to ASTM D-598, heated to a temperature between eighty degrees and one hundred fifty degrees Fahrenheit (80° and 150° F.), and applied uniformly over the surface by means of approved pressure distributors at a rate of two-tenths (0.2) to six tenths (0.6) gallon per square yard, dependent on the gradation of the surface, to ensure a minimum penetration of one (1) inch.