 | Frederick Putnam Spalding - 1903 - 288 lapas
...natural cement to 2 parts of sand 125 Ibs. 7 days (1 day in air, 6 days in water), 1 part of Portland cement to 3 parts of sand... 125 Ibs. 28 days (1 day in air, 27 days in water), 1 part of Portland cement to 3 parts of sand 175 Ibs. PH1LADELPH1A, January 9, 1897. ... | |
 | Frederick Putnam Spalding - 1897 - 304 lapas
...7 days (1 day in air, 6 days in water), 1 part of cement to 3 parts of Standard quartz sand. . 170 Ibs. 28 days (1 day in air, 27 days in water), 1 part of cement to 3 parts of Standard quartz sand. . 240 Ibs. 9. Additional Requirements. — All cements shall meet such additional... | |
 | Frederick Putnam Spalding - 1897 - 286 lapas
...Age. Strength. 7 days (1 day in air, 6 days in water), 1 part of natural cement to 2 parts of sand 50 Ibs. 28 days (1 day in air, 27 days in water), 1 part of natural cement to 2 parts of sand 125 Ibs. 7 days (1 day in air, 6 days in water), 1 part of Portland... | |
 | 1901 - 656 lapas
...Ibs. 7 days (1 day in air, 6 days in water) 1 part of cement to 3 parts of standard quartz sand 170 Ibs. 28 days (1 day in air, 27 days in water) 1 part of cement to 3 parts of standard quartz sand 240 Ibs. 14. Sulphuric Acid. — It Shall not contain more than one and three-quarters... | |
 | Charles Carroll Brown - 1901 - 660 lapas
...in air, 6 days in water) 1 part of cement to 2 parts of standard quartz sand ^ 120 Ibs. 28 days (I day in air, 27 days in water) 1 part of cement to 2 parts of standard quartz sand 200 Ibs. Portland Cement. 10. Specific Gravity and Fineness. — Portland... | |
 | American Society of Civil Engineers - 1902 - 728 lapas
...AGE. STRENGTH. 7 days (1 day in air, 6 days in water) 1 part of Portland cement to 3 parts of sand 100 Ibs. 28 days (1 day in air, 27 days in water) 1 part of Portland cement to 3 parts of sand 150 " PLATE IV. PAPERS AM. SOC. CE MARCH. 1902. WERSTER AND WAGNER... | |
 | 1902 - 992 lapas
...6 days in water), 1 part of cement to 3 parts of standard quartz sand, ...................... 170 " 28 days (1 day in air, 27 days in water), 1 part cement to 3 parts of standard quartz sand, ...................... 240 " "All cements shall meet such... | |
 | Charles Carroll Brown - 1905 - 384 lapas
...natural cement to 2 parts of sand 125 Ibs. 7 days (1 days in air, 6 days in water) 1 part of Portland cement to 3 parts of sand 125 Ibs. 28 days (1 day in air, 27 days in water) 1 part of Portland cement to 3 parts of sand 175 Ibs. MORTAR AND CONCRETE, BUFFALO. Specifications for cement... | |
 | Charles Carroll Brown - 1905 - 440 lapas
...7 days ( 1 day in air, 6 days in water ) 1 part of cement to 3 parts of standard quartz sand. .170 Ibs. 28 days (1 day in air, 27 days in water) 1 part of cement to 3 parts of standard quartz sand . . 240 Ibs. 14. Sulphuric Acid. — It shall not contain more than one and... | |
| |
Ibs. 7 days (1 day in air, 6 days in water), 1 part of cement to 3 parts of Standard quartz sand. 
