California Bearing Ratio (CBR) Test on Soils

California Bearing Ratio (CBR) Test on Soils California Bearing Ratio (C.B.R.) Test which is an ad hoc penetration test developed by the California State Highways Dept. (USA) for the evaluation of sub-grade strengths. It is a measure of the shearing resistance of a soil to penetr...

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Vane Test Procedure – Shear Strength of Soils

Vane Test Procedure – Shear Strength of Soils The Vane test is a field shear test for clays in which a vane consisting of two or four blades fixed at right angles, is attached to the end of rod and pushed into the soil at the bottom of a borehole. The torque required to cau...

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Unconfined Compression Test of Soils Procedure

Unconfined Compression Test of Soils Procedure Unconfined Compression Test is similar to a compression test performed on concrete cylinders and is made by applying an axial load to cylindrical or prismatic soil samples and measuring the deformation corresponding to the stress as ...

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Triaxial Compression Test of Soils Procedure

Triaxial Compression Test of Soils Procedure Triaxial Compression test is used where more precise values of the cohesion and angle of internal friction of a soil are required than determined from a shear box test. The specimen of the soil is subjected to three compressive stresse...

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Shear Box Test of Soils – Procedure

Shear Box Test of Soils – Procedure In the shear box test, failure is caused in a pre-determined plane of the soil, the shear strength or shearing resistance and the normal stress both being measured directly, as it is a direct shear machine. The essential feature of the ap...

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Plastic Limit Test of Soil

Plastic Limit Test of Soil A sample weighting about 15 grams is taken from the material passing the 425 micron sieve and is thoroughly mixed with water on a glass plate until it is plastic enough to be rolled into a ball. The ball of the soil is then rolled between the hand and t...

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Liquid Limit Test of Soil

Liquid Limit Test of Soil The soil sample weighting 30 grams is placed in a porcelain evaporating dish about 115 mm dia., shaped into a smooth layer approximately 10 mm thick at the centre and divided into two portions by means of a grooving tool of standard dimensions. The dish ...

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Consolidation Test of Soil – Confined Compression Test

Consolidation Test of Soil – Confined Compression Test Consolidation Test is performed for the purpose of determining the total volume decrease as well as the time rate of volume decrease which a laterally confined soil sample will undergo when subjected to an axial load. T...

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Consistency or Liquidity Index of Soil

Consistency or Liquidity Index of Soil (LI) It is defined as the natural moisture content of the soil in excess of the FL expressed as a percentage of the PL, i.e., { (Natural moisture content—PL )/(Liquid limit—Plastic limit) }x 100 Percent and is a measure of the consistenc...

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Shrinkage Limit of Soil

Shrinkage Limit of Soil (SL) Shrinkage limit is the limiting moisture content, expressed as a percentage of the dry weight of the soil, at which a further reduction in the moisture (by evaporation) will not cause any further decrease in the volume of the soil mass but at which an...

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