The Chemical And Physical Examination of Portland Cement
The Chemical And Physical Examination of Portland Cement
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Wide, 35 cm. Long, and weighing about 250 grams, the projecting mortar is pounded, first gently and from the sides, then harder into the molds, until the mortar grows elastic and water flushes to the surface. A pound- ing of at least one minute is necessary. An additional filling and pounding of the mortar is not admissible, since the test pieces of the same cement should have the same density at the different testing stations. The mass is now cut off with a knife and the surface smoothed. The ...mold is carefully taken off and the test-pieces placed in a box lined with zinc, which is to be provided with a cover to prevent a non-uniform drying of the test-pieces at differ- ent temperatures. " For making test-pieces of neat cement : ' ' The inside of the molds are slightly oiled, and the same are placed on a metal or glass plate without blotting-paper. 1000 grams of cement are weighed out, 200 grams of water added, and the whole mass thoroughly mixed for five minutes. The forms are well filled and then proceed as for hand-work with sand mortar.
What to read after The Chemical And Physical Examination of Portland Cement?
You can find similar books in the "Read Also" column, or choose other free books by Richard K Richard Kidder Meade to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Wide, 35 cm. Long, and weighing about 250 grams, the projecting mortar is pounded, first gently and from the sides, then harder into the molds, until the mortar grows elastic and water flushes to the surface. A pound- ing of at least one minute is necessary. An additional filling and pounding of the mortar is not admissible, since the test pieces of the same cement should have the same density at the different testing stations. The mass is now cut off with a knife and the surface smoothed. The ...mold is carefully taken off and the test-pieces placed in a box lined with zinc, which is to be provided with a cover to prevent a non-uniform drying of the test-pieces at differ- ent temperatures. " For making test-pieces of neat cement : ' ' The inside of the molds are slightly oiled, and the same are placed on a metal or glass plate without blotting-paper. 1000 grams of cement are weighed out, 200 grams of water added, and the whole mass thoroughly mixed for five minutes. The forms are well filled and then proceed as for hand-work with sand mortar.
What to read after The Chemical And Physical Examination of Portland Cement?
You can find similar books in the "Read Also" column, or choose other free books by Richard K Richard Kidder Meade to read onlineMoreLess
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