Proceedings, Volume 9

Front Cover
American Society for Testing and Materials., 1909 - Building materials
Vols. 1- include reports of the 1st- annual meetings, committee reports, and technical papers; v. 16-38 include also "New and revised tentative standards [and] tentative revisions of standards" (varies slightly).
 

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Page 44 - Material which is to be used without annealing or further treatment shall be tested in the condition in which it comes from the rolls.
Page 134 - Test pieces should be broken as soon as they are removed from the water. Care should be observed in centering the briquettes in the testing machine, as cross-strains, produced by improper centering, tend to lower the breaking strength; the load should not be applied too suddenly, as it may produce vibration, the shock from which often breaks the briquette before the ultimate strength is reached.
Page 124 - A third pat is exposed in any convenient way in an atmosphere of steam, above boiling water, in a loosely closed vessel for five hours.
Page 122 - 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 134 - For these tests, pats about 7$ cm. (2.95 ins.) in diameter, 1j cm. (0.49 in.) thick at the center, and tapering to a thin edge, should be made, upon a clean glass plate [about 10 cm. (3.94 ins.) square], from cement paste of normal consistency. 49. — Normal Test. — A pat is immersed in water maintained as near 21 C. (70 F.) as possible for 28 days, and observed at intervals.
Page 132 - A moist closet or chamber is so easily devised that the use of the damp cloth should be abandoned if possible. Covering the test pieces with a damp cloth is objectionable, as commonly used, because the cloth may dry out unequally, and in consequence the test pieces are not all maintained under the same conditions.
Page 317 - Tensile tests shall be made upon fair samples, and the elongation shall be determined as the permanent increase in length, due to the breaking of the wire in tension, measured between bench marks placed upon the wire originally 10 in. apart. The fracture shall be between the bench marks and not closer than 1 in.
Page 245 - When work is resumed, concrete previously placed should be roughened, thoroughly cleansed of foreign material and laitance, drenched and slushed with a mortar consisting of one part Portland cement and not more than two parts fine aggregate. The faces of concrete exposed to premature drying should be kept wet for a period of at least seven days.
Page 122 - The minimum requirements for tensile strength for briquettes one square inch in cross section shall be as follows and the cement shall show no retrogression in strength within the periods specified : Age.
Page 134 - Fig. 5, .is recommended. This clip is to be used" without cushioning at the points of contact with the, test specimen. The bearing at each point of contact should be J-inch wide, and the distance between the center of contact on the same clip should be 1 } inches.

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