Experiments on the Strength of Cement: Chiefly in Reference to the Portland Cement Used in the Southern Main Drainage WorksSpon, 1875 - 172 páginas |
Outras edições - Ver todos
Experiments on the Strength of Cement: Chiefly in Reference to the Portland ... John Grant Visualização completa - 1875 |
Experiments on the Strength of Cement: Chiefly in Reference to the Portland ... John Grant Visualização completa - 1875 |
Termos e frases comuns
12 ditto 2.25 square inches 21 ditto 9 ditto ashlar Average Breaking Tests Average Weight ballast béton Block-6 blue lias Bramley Breaking Breaking breaking weight brickwork Burham Bushel of Cement Camberwell Road cement and sand Cement Measure cement weighing cent clay Compressed Contractor cost cubic yard Deptford different proportions ditto 12 ditto ditto Engineers Experiments with Portland feet Gault clay Granite heavy cement Hydraulic Press immersed in water lias lime material Materials-Various Messrs mètres Metropolitan Board METROPOLITAN MAIN DRAINAGE mortar neat cement Number of Tests pier pint pit sand Plate PORTLAND CEMENT BRICKS Portland cement concrete Portland stone pozzolana PROPORTION OF SAND quantity Roman cement salt water samples Sand Measure Sectional area Seven Day Tests sewers specific gravity Specified standard Specimens Staffordshire blue bricks STRENGTH OF CEMENT SUMMARY OF PORTLAND TABLE tensile strain tensile strength Thames sand tion twelve months weighing 112 lbs Weight per Bushel
Passagens mais conhecidas
Página 50 - The specifications provide, that the whole of the cement shall be Portland cement of the very best quality, ground extremely fine, weighing not less than 110 Ibs.
Página 56 - The best cement or mortar is obtained from limestones which contain carbonate of lime, magnesia, and clay, naturally commingled in this ratio, of three parts of the former, to one of the latter. The quantity of silicic acid and silica which exists in Halkin Mountain limestone, as per sample analyzed, being evenly distributed through its entire mass, is rendered, by calcination of the stone, most favourable to the production of an insoluble crystallized silicate of lime, when made into mortar.
Página 50 - The whole of the cement shall be Portland cement of the very best quality, ground extremely fine, weighing not less than 110 Ibs. to the striked bushel, and capable of maintaining a breaking weight of 500 Ibs.
Página 50 - Portland cement shall be of the very best quality, ground extremely fine, weighing not less than 112 Ibs. to the striked bushel, and capable of maintaining a breaking weight of 250 Ibs. per square inch, seven days after being made in a brass mould, and immersed in water during the interval of seven days. The contractor shall, at all times, keep in store upon the works a supply of cement equal to at least fourteen days...