The Architect & engineer of California and the Pacific Coast (1905)
San Francisco, Calif. : Architect and Engineer Co · leaf 51
42 The Architect and Engineer … Southern Pacific Car Shops, Oakland, Califorma 2 sand, and 4 crushed rock, gave an approximately correct proportion.Gravel contains from 20% to 30% voids, and if 1 cement, 2 sand, and 4gravel is used a weak concrete will result. A mix of 1 cement. 1 sand,and 5 gravel would have shown a decided…
Architecture · Building
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