Particle-Size Distribution (Gradation)

This test method covers the determination of the particle size distribution of fine and coarse aggregates by sieving. Some specifications for aggregates which reference this test method contain grading requirements including both coarse and fine fractions. Instructions are included for sieve analysis of such aggregates.

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Liquid Limit, Plastic Limit, of Soils

These test methods cover the determination of the liquid limit, plastic limit, and the plasticity index of soils as defined. Two methods for preparing test specimens are provided as follows: Wet preparation method and dry preparation method,. The method to be used shall be specified by the requesting authority. If no method is specified, use the we...

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SPECIFIC GRAVITY OF SOIL

The Specific gravity is the ratio of the weight in air of a given volume of a material at a standard temperature to the weight in air of an equal volume of distilled water at the same temperature, this test is performed to determine the specific gravity of fine grained soil by density bottle method.

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Determine free swell index of soil

To determine the free swell index of soil as per IS: 2720 (Part XL) – 1977. Free swell or differential free swell, also termed as free swell index, is the increase in volume of soil without any external constraint when subject-ed to submergence in water .

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Shrinkage limit of soil by the wax method

This test method covers the procedure for determining the shrinkage limit of soils. The data obtained using this test method may also be used to calculate shrinkage ratio, volumetric shrinkage, and linear shrinkage. This test method is applicable only for cohesive soils. The shrinkage limit can be used to evaluate the shrinkage potential, crack dev...

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Laboratory Compaction Characteristics of Soil

Using Modified Effort    These test methods cover laboratory compaction methods used to determine the relationship between molding water content and dry unit weight of soils (compaction curve) compacted in a 4- or 6-in. (101.6- or 152.4-mm) diameter mold with a 10.00-lbf. (44.48-N) rammer dropped from a height of 18.00 in. (457.2 mm) producing a co...

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Direct Shear test

This test is conducted to determine the shearing strength of the soil using the direct shear apparatus. In many engineering problems such as design of foundation, retaining walls, slab bridges, pipes, sheet piling, the value of the angle of internal friction and cohesion of the soil involved are required for the design. Direct shear test is used to...

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Consolidation test

This test is performed to determine the magnitude and rate of volume decrease that a laterally confined soil specimen undergoes when subjected to different vertical pressures. From the measured data, the consolidation curve (pressure-void ratio relationship) can be plotted. This data is useful in determining the compression index, the recompression...

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Unconfined compression test

The primary purpose of this test is to determine the unconfined compressive strength, which is then used to calculate the unconsolidated un-drained shear strength of the clay under unconfined conditions.According to the ASTM standard, the unconfined compressive strength (qu) is defined as the compressive stress at which an unconfined cylindrical sp...

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