Concrete in the country / [American Cement Company]. (1910)
American Cement Company · Association of American Portland Cement Manufacturers · leaf 12
Fig. I.—Quantities of cenient, sand, and gravel in i 12:4 concrete mixture, whichleans i part cement, 2 parts sand, 4 parts crushed stone or gravel, and the resultinguantity of concrete, which is only slightly greater in size than the gravel, the sandnd cement filling the voids in the gravel. TABLE…