A Treatise on Concrete, Plain and Reinforced: Materials, Construction, and Design of Concrete and Reinforced Concrete |
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Common terms and phrases
28 days alumina arch average barrel bending bending moment bond stresses broken stone cent Chapter clay clinker column compressive strength computed consistency construction cost cracks crete cubic foot cubic yard curve deformation density depth determined diagonal tension diagram diameter effect elastic limit elasticity Engineering feet floor forms formula girder grains gravel horizontal hydraulic lime length lime limestone live load material maximum method mixer mixing mixture modulus moisture mortar Natural cement neutral axis obtained particles placed Portland cement pounds per square pressure proportions Puzzolan quantity ratio reinforced concrete resistance round bars sample sand Sanford E screen shear shearing stress shown in Fig sieve silica slab span specific gravity specimens square foot square inch stirrups stress in steel structure surface T-beam temperature tensile strength tensile stresses tests thickness tri-calcium unit stress vertical volume wall weight width
Popular passages
Page 75 - 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 83 - These pats, to satisfactorily pass the requirements, shall remain firm and hard and show no signs of distortion, checking, cracking, or disintegrating.
Page 64 - Composite Sample. — If sampled in cars one sample shall be taken from one sack in each 40 sacks (or 1 bbl. in each 10 bbl.) and combined to form one test sample. If sampled in bins or warehouses one test sample shall represent not more than 200 bbl.
Page 70 - ... 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...
Page 62 - The specific gravity of cement shall be not less than 3.10 (3.07 for white portland cement). Should the test of cement as received fall below this requirement a second test may be made upon an ignited sample.
Page 78 - Briquettes that are manifestly faulty, or which give strengths differing more than 15 per cent, from the average value of all test pieces made from the same sample and broken at the same period, shall not be considered in determining the tensile strength.
Page 68 - ... and 64 g. of cement, of the same temperature as the liquid, shall be slowly introduced, taking care that the cement does not adhere to the inside of the flask above the liquid and to free the cement from air by rolling the flask in an inclined position.
Page 34 - T-beams shall not exceed one-fourth of the span length of the beam, and its overhanging width on either side of the web shall not exceed eight times the thickness of the slab nor one-half the clear distance to the next beam.
Page 65 - C. for one-half to one hour. The residue shall be treated with 10 cc. of concentrated hydrochloric acid diluted with an equal amount of water. The dish shall be covered and the solution digested for ten minutes on a steam bath or water bath.
Page 63 - Packages varying more than 5 per cent from the specified weight may be rejected; and if the average weight of packages in any shipment, as shown by weighing 50 packages taken at random, is less than that specified, the entire shipment may be rejected.