A Treatise on Masonry Construction |
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Common terms and phrases
abutment amount angle arch barrel beam bottom brick bridge briquettes broken stone building caisson cement mortar cent of voids center of pressure clay coarse coffer-dam compression compressive strength considerable construction cost crushing strength cubes cubic foot cubic yard culvert curve cylinder density depth determine diameter durability earth edge effect employed Engineering equation experiments face factor of safety feet foot forms formula foundation freezing friction give grains granite gravel greater hence horizontal hydraulic lime inches increase joints less lime limestone line of resistance load masonry mass material maximum method mixed mixture natural cement pier pipe portland cement pounds pressure proportion rammed reinforced concrete retaining wall rods sandstone shows sieve silica slaked soil sometimes specific gravity square steel stress structure surface Table temperature tensile strength thickness timber usually varies vertical volume voussoir weight
Popular passages
Page 592 - This term shall be applied to the finely pulverized product resulting from the calcination of an argillaceous limestone at a temperature only sufficient to drive off the carbonic acid gas.
Page 47 - The moulds should be filled at once, the material pressed in firmly with the fingers and smoothed off with a trowel without ramming; the material should be heaped up on the upper surface of the...
Page 593 - 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.
Page 37 - Method. — As a method to be followed for the analysis of cement, that proposed by the Committee on Uniformity in the analysis of Materials for the Portland Cement Industry, of the New York Section of the Society for Chemical Industry, and published in the Journal of the Society for January 15, 1902, is recommended.
Page 43 - The dry materials shall be weighed, placed upon a nonabsorbent surface, thoroughly mixed dry if sand is used, and a crater formed in the center, into which the proper percentage of clean water shall be poured ; the material on the outer edge shall be turned into the crater by the aid of a trowel. After an interval of one-half minute for the absorption of the water the operation shall be completed by continuous, vigorous mixing, squeezing and kneading with the hands for at least one minute.
Page 593 - The minimum requirements for tensile strength for briquettes one inch square in section shall be within the following limits, and shall show no retrogression in strength within the periods specified. Age. Neat Cement. Strength. 24 hours in moist air 150-200 Ibs.
Page 447 - ... or even less, may be used. C should be. increased for steep side slopes, especially if the upper part of the valley has a much greater fall than the channel at the culvert.
Page 593 - FINENESS. It shall leave by 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.
Page 36 - SIGNIFICANCE. — Chemical analysis may render valuable service in the detection of adulteration of cement with considerable amounts of inert material, such as slag or ground limestone. It is of use, also, in determining whether certain constituents, believed to be harmful when in excess of a certain percentage, as magnesia and sulphuric anhydride, are present in inadmissible proportions.
Page 592 - The cement shall be stored in such a manner as to permit easy access for proper inspection and identification of each shipment. 5. Every facility shall be provided by the contractor and a period of at least twelve days allowed for the inspection and necessary tests.