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Los Angeles Abrasion Test:
In which the aggregates are placed in a rotating drum in which a certain number of cast iron cylindrical balls are also placed, and the drum rotated at a given speed for 500-1000 revolutions. The weight of fine material that is generated is determined. A Los Angeles Abrasion value of 40 per cent is allowed for stone aggregate base courses and 30-35 per cent for bituminous courses. The apparatus is shown in Figure.
Figure: Los Angeles Abrasion Test Apparatus
Use of Admixtures in Concrete The use of chemical admixtures may be made in prestressed concrete construction. But the admixture should not contain chlorides in any form. This
A soil sample with a grain specific gravity of 2.67 was filled in a 1000 ml container in the loosest possible state and the dry weight of the sample was found to be 14.75 N. It was
CBR Test is an arbitrary test', justify. Explain the procedure for conducting the CBR test in the field. Surcharge loads are used in the CBR test; Describe their significa
what are the necessary data required for foundation recommendation other than SPT value ? why can''t we go for SPT value alone?
You have been selected to assist the structural engineer for a bridge replacement project. Your task is to design the size of the footing for an interior bridge pier, based on the
A square pile group of 16 piles passes by a filled up soil of 3 m depth. The pile diameter is 25 cm and pile spacing is 75 cm. If the unit cohesion of the material is 18 kN/m 2 an
natural phenomenon affecting the designs of harbours
Common Building Stones Here describe some commonly used stones are following: a. Granite b. Basalt and trap c. Slate d. Sand stone e. Marble f.
What is civil engineering?
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