Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 221
links to turn on their pivots, freeing the casing from the surrounding stone or cement, and the core is withdrawn through a hole on one side of the mold, leaving the still green block entirely uninjured. It is not necessary to wait for the block to dry. The core is unaffected by moisture, and is… … mold or plaster cast hitherto universally in use, the moisture con- tained in the cement or concrete would get into the apparatus or mold, and, becoming imprisoned in the block, would cause the stone to swell after its release from the mold. This swelling neces- sarily produces a crack. The crack,…
Engineering
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