A treatise on concrete, plain and reinforced : materials, construction, and design of concrete and reinforced concrete; 2nd ed. . Fig. 13.—Details for Gang Mould. {See p. 73). Fig. 13a.—Mould for Compression Test Pieces. {See p. 7j) European is compared with U. S. standard sand on page German standard briquette is sketched on page 92. Moulds. 37. The moulds should be of brass, bronze, or other non-corrodible material, and should have sufficient metal in the sides to preventspreading during moulding. 38. Moulds may be either single or gang moulds. The latter arepreferred by many. If used
A treatise on concrete, plain and reinforced : materials, construction, and design of concrete and reinforced concrete; 2nd ed. . Fig. 13.—Details for Gang Mould. {See p. 73). Fig. 13a.—Mould for Compression Test Pieces. {See p. 7j) European is compared with U. S. standard sand on page German standard briquette is sketched on page 92. Moulds. 37. The moulds should be of brass, bronze, or other non-corrodible material, and should have sufficient metal in the sides to preventspreading during moulding. 38. Moulds may be either single or gang moulds. The latter arepreferred by many. If used, the types shown in Figs. 13 and 13a arerecommended. 39. The moulds should be wiped wath an oily cloth before 40. The proportions of sand and cement should be stated by weight; the quantity of water should be stated as a percentage by weightof the dry material. This sand may now (1912) be obtained from the Ottawa Silica Co., at a cost of two cents per poundf. o. b. cars, Ottawa, 111. 74 A TREATISE ON CONCRETE 41. The metric system is recommended because of the convenientrelation of the gramme and the cubic centimeter. 42. The temperature of the room an
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