Retaining Walls: Their Design and ConstructionMcGraw-Hill Book Company, Incorporated, 1920 - 275 Seiten |
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abutment aggregate amount analysis angle of friction angle of repose assumed base slab bending bending moment bottom cantilever cement chapter cohesion construction cost counterforted wall cubic foot depth determine dimensions distribution earth mass economical equation expansion joints expression face factor of safety feet fill fineness modulus foundation friction given gives gravity wall heel horizontal hydrostatic pressure intensity kips lateral pressure load masonry material maximum method mixer mixing necessary piles placed plane of saturation plant point of application pounds per square proper Rankine ratio reinforced concrete retaining wall rods rubble wall S₁ sand shear shown in Fig sieve sieve analysis sliding soil pressure spacing square foot square inch steel stone strength stress surcharge surface Table taken theory thickness thrust tie rods tion toe extension type of wall usual vertical arm wedge width
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Seite 215 - F. as practicable, and observed at intervals for at least 28 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. 23. These pats, to satisfactorily pass the requirements, shall remain firm and hard, and show no signs of distortion, checking, cracking, or disintegrating.
Seite 215 - 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.
Seite 240 - ... by weight, nor shall the penetration at 77 degrees Fahr. after such heating be less than one-half of the original penetration. The melting point of the material shall be between 115 degrees and 135 degrees Fahr.
Seite 215 - One Part Cement, Three Parts Standard Ottawa Sand. 7 days (1 day in moist air, 6 days in water)... 200 Ibs.
Seite 204 - S is the compressive strength of the concrete and x is the ratio of the volume of water to the volume of cement in the batch. A and B are constants whose values depend on the quality of the cement used, the age of the concrete, curing conditions, etc.
Seite 217 - These sieves are made of square-mesh wire cloth. Each sieve has a clear opening just double the width of the preceding one. The exact dimensions of the sieves and the method of determining the fineness modulus will be found in Table 1. It will be noted that the sieve analysis is expressed in terms of the percentages of material by volume or weight coarser than each sieve. A well-graded torpedo sand up to No. 4 sieve will give a fineness modulus of about 3.00; a coarse aggregate graded 4-154 in.
Seite 215 - 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.
Seite 219 - This relation applies to a single-size material or to a given particle. The fineness modulus is then a logarithmic function of the diameter of the particle. This formula need not be used with a graded material, since the value can be secured more easily and directly by the method used in Table 1.
Seite 218 - ... gives concrete of the same strength, so long as it is not too coarse for the quantity of cement used.
Seite 235 - The face shall be removed as soon as the concrete has sufficiently hardened; and any voids that may appear shall be filled with the mixture. The surface shall then be immediately washed with water until the grit is exposed and rinsed clean, and shall be protected from the sun and kept moist for three days.