Action of the salts in alkali water and sea water on cements. . Fig. 19.—Crate with concrete test piecesbefore placing in sea water Fig. 20.—Crate with concrete test pieces afterstorage in sea water. Fig. 21.—Crate with concrete test pieces after storage in sea water Action of Alkali and Sea Water on Cements 55 machine was brought down onto the test piece. The purpose ofthis was to keep the head of the machine and the surface of the testpiece parallel until the load was caught, thus making it bearuniformly over the entire surface. The load was constantlyapplied, the head moving at the rate of
Action of the salts in alkali water and sea water on cements. . Fig. 19.—Crate with concrete test piecesbefore placing in sea water Fig. 20.—Crate with concrete test pieces afterstorage in sea water. Fig. 21.—Crate with concrete test pieces after storage in sea water Action of Alkali and Sea Water on Cements 55 machine was brought down onto the test piece. The purpose ofthis was to keep the head of the machine and the surface of the testpiece parallel until the load was caught, thus making it bearuniformly over the entire surface. The load was constantlyapplied, the head moving at the rate of of an inch per minute,until failure of the test piece or the capacity of the machine wasreached. 2. TENSION TEST PIECES (a) PROPORTIONING The ratios of the constituent materials of the mortars wereassumed according to weight measure. (6) CONSISTENCY The normal consistency was predetermined with a Vicat needlefor the neat cements, and for Portland cement sand mortars thewater equivalent as recommended by the committee on uniformtests of the American Society of Civil Engineers was used. Thewater required for sand mortars made with natural, slag, or otherspecial cements was judged by eye
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernatio, bookyear1912
