id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
59379	Miller, T. A. H. (Thomas Arrington Huntington)	Plain Concrete for Farm Use			.txt	text/plain	10157	618	75	Portland cement concrete is the mass formed by mixing Portland cement, sand, gravel (or particles of other suitable materials), and water. In mixing concrete various proportions of cement, sand, gravel, and water of concrete produced is equal to the quantity of sand plus the gravel Table 1 shows the quantity of cement, sand, and gravel required under Forms are required to hold the concrete in place until it has attained The tendency is to use too much water in mixing concrete in a The mixed concrete should be deposited in the forms within from 20 to 30 Concrete which has set before it can be placed in the forms should not be Scum or laitance is likely to form on concrete when placed under water, [Illustration: Fig. 16.--Tremie for use in placing concrete under water.] The materials for water-tight concrete must be well graded, so as to	./cache/59379.txt	./txt/59379.txt