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 18
... pounds net ; natural cements weigh from 250 to 300 pounds net per barrel . The activity of a cement is determined by its rate of setting . For most purposes , where immediate setting is not required to prevent disturbance of the mortar ...
... pounds net ; natural cements weigh from 250 to 300 pounds net per barrel . The activity of a cement is determined by its rate of setting . For most purposes , where immediate setting is not required to prevent disturbance of the mortar ...
Сторінка 21
... pound it is said to have had its initial set . This is usually within 1/2 т FIG . 4. - Pats Showing Cracks of Complete Disintegration which Begin by the Radial Cracks Shown in Fig . 3 . hour to 1 hour and the process of manufacture may ...
... pound it is said to have had its initial set . This is usually within 1/2 т FIG . 4. - Pats Showing Cracks of Complete Disintegration which Begin by the Radial Cracks Shown in Fig . 3 . hour to 1 hour and the process of manufacture may ...
Сторінка 73
... pounds per cubic foot are reasonably safe . " In ordinary walls where the concrete is placed in layers , compu- tation is not usually necessary , since general experience has shown that maximum spacing for 1 - inch boards is 2 feet ...
... pounds per cubic foot are reasonably safe . " In ordinary walls where the concrete is placed in layers , compu- tation is not usually necessary , since general experience has shown that maximum spacing for 1 - inch boards is 2 feet ...
Сторінка 74
... pounds ... Pressure on I square foot in pounds . 40 160 640 1440 2560 5760 10240 16000 23040 1280 1600 1920 80 160 320 480 640 960 in contact . Crude oil is generally employed for the purpose , but any grease that will spread evenly and ...
... pounds ... Pressure on I square foot in pounds . 40 160 640 1440 2560 5760 10240 16000 23040 1280 1600 1920 80 160 320 480 640 960 in contact . Crude oil is generally employed for the purpose , but any grease that will spread evenly and ...
Сторінка 75
... pounds . Z E = = Distance between supports in inches . Modulus of elasticity of lumber used . I = Moment of inertia of cross - section of plank or joist . b h = = Breadth of lumber . Depth of lumber . For spruce lumber and other woods ...
... pounds . Z E = = Distance between supports in inches . Modulus of elasticity of lumber used . I = Moment of inertia of cross - section of plank or joist . b h = = Breadth of lumber . Depth of lumber . For spruce lumber and other woods ...
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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.