(1) Portland cement: Portland cement shall conform to the requirements of the A.S.T.M. Standard Specification C-9-30 when tested by A.S.T.M. Standard Method C-77-30.

(2) Sand and gravel: Sand and gravel shall be of such size, shape, and portions so as to be satisfactory workability in the opinion of the engineer. Notwithstanding other specifications, if the concrete is not of workable character or does not exhibit a proper, finished surface, the sand and gravel aggregate shall not be used until proper characteristics are shown.

Fine aggregate shall consist of hard, durable, strong washed particles, free of adherent coating. Not more than 20% of the sand shall consist of particles less than 1.95 specific gravity when tested by Method A.S.T.M. C40-27. The grading of the sand used shall conform to the limits set forth for the particular concrete in question.

The coarse aggregate shall have the same general characteristics as the fine aggregate, except that when tested by the Decantation Method, it shall not contain more than one-half of one percent deleterious matter. Unless otherwise specified, the coarse aggregate shall not be more than 50% larger than the minimum depth of the finished concrete. The grading of the coarse aggregate shall conform to the limits set forth for the particular concrete in question.

(3) Joint material: The bituminous pre-molded joint shall conform to the dimension indicated in the project plans and shall be of asphaltic or tar composition of approved quality. The joint material shall be of a type not ordinarily deformed by handling during hot weather, or brittle in cold weather; the bitumen shall be uniformly impregnated with suitable filler to reduce low temperature brittleness. Thin strips of stiffener will be allowed.

When a 2x6” specimen, cut parallel to the lay of the fiber, is immersed in water for twenty-four hours, it must not absorb more than 5% by weight.

The pre-molded joint material shall not crack or shatter when subjected to the following test: A 2x6” test sample which has been chilled for 2 hours at 4 to 6 degrees F. is clamped between two boards so that the test sample cantilevers 3.5”. A .95 lb cast iron ball is suspended 1’ above the center of cantilevered specimens which are not more than 9/16” thick, or 2’ for specimens thicker than 9/16”. The ball shall be dropped by burning the string holding the ball in suspension.

The pre-molded joint material shall not show a distortion of more than 1” deflection when subjected to the following test: A 2x6” flat and straight test sample shall be clamped between two blocks so that the sample cantilevers 3.5”. The clamped specimen is then placed in an oven at 125 degrees F. for a period of 1 hour.

If any type of expansion material other than that described above is used, it must be approved by the engineer before use.

(4) Lumber: Lumber shall conform to the standard grading rules of the Western White Pine Manufacturers Association for the grade specified.

(5) Water: Water shall be taken from the Town water supply. Water from other sources shall not be used unless first approved by the engineer in writing.

(6) Miscellaneous materials: All other materials used shall be of a quality generally used and which has proven satisfactory on such projects. Such materials shall receive Council approval before use on a project. (Ord. 8-N, §, 1947)