Practical Reinforced Concrete Standards, for the Design of Reinforced Concrete BuildingsSimpson Bros. Corporation, 1908 - 53 Seiten |
Häufige Begriffe und Wortgruppen
architect Area of Steel Asbestos Century assumed beams and girders bending moment Boston briquettes building Cement Barrels Sand cent centre centroid of compression centroid of tension clean compressive strength compressive stress concentrated loads concrete columns CONSTANCY OF VOLUME crete dead load designed diameter distance due to load elastic limit ELEMENTS OF REINFORCED engineers equals flange floor slab formula grillage horizontal material maximum mesh method mixing mixture moist air molds mortar neutral axis obtained PIER FOOTING PORTLAND CEMENT pounds per square prevent cracks developing Proportions REINFORCED CONCRETE BEAMS requirements sample sectional area SEPARATOR-CLAMP shear shearing stress Shingles sieve soil SPAN IN FEET specific gravity square foot square inch standard sections Standard Specifications Straight Sec strength of concrete T-section temperature tensile strength tensile stress test pieces thickness of slab Three tons trussed rods unit stress vertical W₁ WATERTOWN ARSENAL wire
Beliebte Passagen
Seite 36 - Section 37, and quickly formed into a ball with the hands, completing the operation by tossing it six times from one hand to the other, maintained about 6 in.
Seite 40 - 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. Care must be taken that the clips and the sides of the briquette be clean and free from grains of sand...
Seite 34 - Fahr.) and cooled to the temperature of the liquid, Is gradually introduced through the funnel (B) the stem of which extends into the flask to the top of the bulb (C), until the upper mark (F) is reached.
Seite 38 - The sand and cement should be thoroughly mixed dry. The mixing should be done on some non-absorbing surface, preferably plate glass. If the mixing must be done on an absorbing surface it should be thoroughly dampened prior to use.
Seite 33 - F. as practicable, and observed at intervals for at least twenty-eight days. (c) 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. 17. These pats, to satisfactorily pass the requirements, shall remain firm and hard and show no signs of distortion, checking, cracking, or disintegrating.
Seite 33 - ... 2. The sample shall be a fair average of the contents of the package ; it is recommended that, where conditions permit, one barrel in every ten be sampled. 3. All samples should be passed through a sieve having twenty meshes per linear inch, in order to break up lumps and remove foreign material ; this is also a very effective method for mixing them together in order to obtain an average. For determining the characteristics of a shipment of cement, the individual samples may be mixed and the...
Seite 31 - The cement shall be stored in such a manner as to permit easy access for proper inspection and identification of each shipment, and in a suitable weather-tight building which will protect the cement from dampness.
Seite 39 - 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.
Seite 38 - The material is weighed and placed on the mixing table, and a crater formed in the centre, into which the proper percentage of clean water is poured ; the material on the outer edge is turned into the crater by the aid of a trowel. As soon as the water has been absorbed, which should not require more than one minute...
Seite 32 - This term is applied to the finely pulverized product resulting from the calcination to incipient fusion of an intimate mixture of properly proportioned argillaceous and calcareous materials, and to which no addition greater than 3% has been made subsequent to calcination.