Popular Hand Book for Cement and Concrete Users: A Comprehensive and Popular Treatise on the Principles Involved and Methods Employed in the Design and Construction of Modern Concrete Work ...Norman W. Henley Publishing Company, 1911 - 430 стор. |
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Сторінка 6
... acid from the air . Lime mortar acquires strength only by the absorption of carbonic acid . This is a slow process , and does not take place unless there is a free circulation of air to carry the carbonic acid to the mortar . Hence in a ...
... acid from the air . Lime mortar acquires strength only by the absorption of carbonic acid . This is a slow process , and does not take place unless there is a free circulation of air to carry the carbonic acid to the mortar . Hence in a ...
Сторінка 7
... acid on exposure to the air . The free lime also causes it to crack when used without sand , but the swelling and cracking are much less pronounced than in the case of fat limes . When used in water or in damp places , the actions of ...
... acid on exposure to the air . The free lime also causes it to crack when used without sand , but the swelling and cracking are much less pronounced than in the case of fat limes . When used in water or in damp places , the actions of ...
Сторінка 11
... acids , and water . These materials may be either limestone and clay , marl and clay , chalk and clay , or cement rock and lime- stone , the last named being the most commonly used . Processes . - The method of mixing of the raw ...
... acids , and water . These materials may be either limestone and clay , marl and clay , chalk and clay , or cement rock and lime- stone , the last named being the most commonly used . Processes . - The method of mixing of the raw ...
Сторінка 22
... acid 3 parts , water I part , cement 1/3 part . A good cement will effervesce about two seconds . If it effervesces continually it con- tains too much limestone or natural cement and should not be used . Cement in the laboratory is also ...
... acid 3 parts , water I part , cement 1/3 part . A good cement will effervesce about two seconds . If it effervesces continually it con- tains too much limestone or natural cement and should not be used . Cement in the laboratory is also ...
Сторінка 24
... acid gas . Fineness . It shall leave by weight a residue of not more than 10 per cent on the No. 100 , and 30 per cent on the No. 200 sieve . Time of Setting . - It shall not develop initial set in less than ten minutes , and shall not ...
... acid gas . Fineness . It shall leave by weight a residue of not more than 10 per cent on the No. 100 , and 30 per cent on the No. 200 sieve . Time of Setting . - It shall not develop initial set in less than ten minutes , and shall not ...
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50 cents abutment acid aggregate applied arch asphalt barrel bars bending bottom brick bridge broken stone building carrying cent centre chapter coat color columns compression compressive stress concrete blocks consists construction cost cracks crete cubic cubic foot depth diameter employed engineer face feet filled finish floor forms formula foundation girders gravel grout gypsum hardening horizontal hydraulic lime inches lath lime load machine manufacture masonry material metal method mixer mixing mixture mortar mould O'CONOR SLOANE obtained ornamental pile pipe placed plaster plaster of Paris Portland cement posts practical pressure Price proportions reinforced concrete reinforced-concrete removed resistance retaining walls rods Rule sand sewer shear slab slaked lime space span steel stirrups strength stress structure stucco surface tamped tanks tensile stresses tension tests tile trowel tunnel vertical waterproofing weight wire wooden
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Сторінка 25 - Pats of neat cement about three inches in diameter, one-half inch thick at the center, and tapering to a thin edge, shall be kept in moist air for a period of twenty-four hours.