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 25
... weight a residue of not more than 8 per cent on the No. 100 , and not more than 25 per cent on the No. 200 sieve . Time of Setting . - It shall not develop initial set in less than thirty minutes ; and must develop hard set in not less ...
... weight a residue of not more than 8 per cent on the No. 100 , and not more than 25 per cent on the No. 200 sieve . Time of Setting . - It shall not develop initial set in less than thirty minutes ; and must develop hard set in not less ...
Сторінка 26
... not required . Its most valuable properties are its light weight and the resistance which it offers to heat . It is therefore used for fireproofing and light floor construction . Cinder concrete is weak and porous . It is not [ 26 ]
... not required . Its most valuable properties are its light weight and the resistance which it offers to heat . It is therefore used for fireproofing and light floor construction . Cinder concrete is weak and porous . It is not [ 26 ]
Сторінка 29
... weight of the same materials , the smallest volume , after setting , of Portland cement paste or mortar , gives the highest strength . Dry - mixed mortars usually test higher than wet after short periods , as they set and harden more ...
... weight of the same materials , the smallest volume , after setting , of Portland cement paste or mortar , gives the highest strength . Dry - mixed mortars usually test higher than wet after short periods , as they set and harden more ...
Сторінка 36
... weight , produces the least volume of mortar . Economy can be practised in the matter of the selection of sand . It will nearly always pay the concrete con- structor to haul sand even from a considerable distance , [ 36 ]
... weight , produces the least volume of mortar . Economy can be practised in the matter of the selection of sand . It will nearly always pay the concrete con- structor to haul sand even from a considerable distance , [ 36 ]
Сторінка 44
... weight have been subjects of extended controversy and often bitterness between engineer and contractor , and has resulted in much friction and litigation . The tendency now is to fix an arbitrary but average value for the volume of the ...
... weight have been subjects of extended controversy and often bitterness between engineer and contractor , and has resulted in much friction and litigation . The tendency now is to fix an arbitrary but average value for the volume of the ...
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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.