 | Geological Survey of New South Wales - 1916 - 1286 pages
...maintained as near 70° F. as practicable. These pats are observed at intervals for at least 28 days, and should remain firm and hard, and show no signs of distortion, checking, cracking, or disintegration. Natural Cement Rock in New South Wales. Natural cement has not yet been manufactured... | |
 | Agriculture - 1908 - 602 pages
...24 hours, (b) in air at normal temperature for 28 days, (c ) in water at 70° F. for 28 days, must remain firm and hard and show no signs of distortion, checking, cracking, or disintegration. 14. Weight. — The average weight of natural cement, packed, is 74 pounds per cubic... | |
 | Gaetano Lanza - Engineering - 1905 - 980 pages
...in normal temperature. (b) Another is kept in water maintained as near 70° F. as practicable. 17. These pats are observed at intervals for at least...distortion, checking, cracking or disintegrating. PORTLAND CEMENT. 18. Definition. — This term is applied to the finely pulverized product resulting... | |
 | Charles Carroll Brown - Cement - 1905 - 384 pages
...normal temperature. (b) Another is kept in water maintained as near 70 degrees P. as practicable. 17. These pats are observed at intervals for at least...distortion, checking, cracking or disintegrating. 18. PORTLAND CEMENT. — Definition. This term is applied to the finely pulverized product resulting... | |
 | Edwin Clarence Eckel - Cement - 1905 - 802 pages
...as near 70° F. as practicable. 17. These pats are observed at intervals for at least twenty-eight days, and, to satisfactorily pass the tests, should...distortion, checking, cracking, or disintegrating. Comparison and Summary. It is of interest to compare the requirements, on various points, of the specifications... | |
 | Gilbert Richard Redgrave - Cement - 1905 - 406 pages
...as near 70° F. as practicable. 17. These pats are observed at intervals for at least twenty-eight days, and, to satisfactorily pass the tests, should...distortion, checking, cracking, or disintegrating. Portland Cement. 18. Definition. — This term is applied to the finely-pulverised product resulting... | |
 | Mineral industries - 1905 - 612 pages
...is then kept in air at normal temperature; (&) another is kept im water maintained as near 70° F. as practicable. These pats are observed at intervals for at least 28 days, and, to pass the tests satisfactorily, should remain firm and hard and show no signs of distortion, checking,... | |
 | Mineral industries - 1905 - 708 pages
...practicable. These pats are observed at intervals for at least 28 days, and, to pass the tests satisfactorily, should remain firm and hard and show no signs of distortion, checking, cracking or disintegrating. Portland Cement. — This term is applied to the finely pulverized product resulting from the calcination... | |
 | Ontario. Legislative Assembly - Ontario - 1905 - 1154 pages
...in a loosely clfosed vessel for five hours. These pats to satisfactorily pass the requirements shall remain firm and hard and show no signs of distortion, checking, cracking or disintegrating. Sulphuric Acid and Magnesia. The cement shall not contain more than 1.75 per cent, of anhydrous pulphuric... | |
 | Ontario. Department of Mines, Ontario. Bureau of Mines - Geology - 1905 - 670 pages
...in a loosely cltosed vessel for five hours. These pats to satisfactorily pass the requirements shall remain firm and hard and show no signs of distortion, checking, cracking or disintegrating. Sulphuric Acid and Magnesia. The cement shall not contain more than 1.75 per cent, of anhydrous sulphuric... | |
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These pats are observed at intervals for at least 28 days, and, to satisfactorily pass the tests, should remain firm and hard and show no signs of distortion, checking, cracking or disintegrating. 
