Annual Report, Volume 4 |
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77 degrees F adopted amalgamation amendment American Society asphaltic cement asphaltic concrete associate members Association for Standardizing BABCOCK BEATY binder binder course bituminous cement blocks bond brick Bureau of Highways carbon disulphide carbon tetrachloride cent Chairman Chief Engineer coal coal tar coarse aggregate Commissioner Company concrete base concrete pavement CONNELL degrees centigrade degrees Fahr delegate distillation Engineer City Executive Committee expansion joints feet filler flask Gentlemen GEORGE W grade gravel grout guarantee heretofore recommended HITTELL KINGSLEY laid less LEWIS macadam macadam base material matter meeting membership ments mittee mixed mixture mortar motion Municipal Improvements one-half organization pavement penetration Pittsburgh Portland cement PRESIDENT HARDEE recommended in sidewalk roller rolling sample sand screen Secretary SHERRERD sidewalk specifications sieve Society of Municipal specific gravity SPRAGUE Standardizing Paving Specifications stone street sub-grade suggestion temperature thickness TILLSON tion TONSON WARREN BROTHERS water gas wearing surface weight
Popular passages
Page 138 - ... (10.58 oz.). The rod, which can be held in any desired position by a screw (F) carries an indicator, which moves over a scale (graduated to centimeters) attached to the frame (K). The paste is held by a conical, hard-rubber ring (I), 7 cm.
Page 142 - A moist closet consists of a soapstone or slate box, or a metallined wooden box: the metal lining being covered with felt and this felt kept wet. The bottom of the box is so constructed as to hold water, and the sides are provided with cleats for holding glass shelves on which to place the briquettes. Care should be taken to keep the air in the c'.oset uniformly moist.
Page 144 - 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. Care must be taken that the clips and the sides of the briquette be clean and free from grains of sand or dirt, which would prevent a good bearing.
Page 143 - 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 133 - ONE PART CEMENT, THREE PARTS STANDARD OTTAWA SAND. 7 days (1 day in moist air, 6 days in water) 200 pounds 28 days (1 day in moist air, 27 days in water) 275 pounds CONSTANCY OF VOLUME.
Page 178 - Nelson P. Lewis, Chief Engineer of the Board of Estimate and Apportionment of New York City.
Page 96 - Manganese — Not more than 0.50%. . Phosphorus — Not more than 0.25%. Sulphur — Not more than 0.08%. For each new batch of spheres used the chemical analysis must be furnished by the maker, or be obtained by the user, before introduction into the charge ; and unless the analysis meets the above specifications, the batch of spheres shall be rejected. THE TEST.
Page 142 - A check upon the uniformity of the mixing and moulding is afforded by weighing the briquettes just prior to immersion, or upon removal from the moist closet. Briquettes which vary in weight more than 3 per cent from the average should not be tested. Storage of the Test Pieces.
Page 134 - 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. These pats, to satisfactorily pass the requirements, shall remain firm and hard and show no signs of distortion, checking, cracking, or disintegrating.
Page 133 - All tests shall be made in accordance with the methods proposed by the Committee on Uniform Tests of Cement of the American Society of Civil Engineers, presented to the society Jan.