The maximal axial compressive stress that a specimen can withstand under no confining stress is known as unconfined compressive strength. The Unconfined Compression Test is a laboratory procedure for determining the Unconfined Compressive Strength of a rock specimen, clayey soil, and other materials. Laboratory Procedure/ Method Unconfined Compression Test is a variant of an undrained … Read more
Triaxial loading of soils is more common than biaxial loading (as in the direct shear loading). The triaxial shear test or triaxial compression test is the laboratory test that better simulates field loading. Apparatus Required for Triaxial Shear Test The test apparatus consists of a different items mentioned below : strain controlled loading frame triaxial … Read more
The most common method of shear testing is the direct shear test. It includes pushing a soil specimen to fail along a predetermined shear plane and testing the resistance to deformation. The Mohr-Coulomb law of shearing strength is based on a relationship between shear stresses and normal stresses on a horizontal slip plane. Apparatus Used … Read more
The Vane Shear Test is carried out in accordance with IS : 2720 (part XXX) – 1980. This test is useful for determining the undrained shear strength (S) of clay and can be performed both in the lab and in the field. A four-bladed vane on the end of a rod makes up the apparatus. … Read more
Definition of Principal Planes A three-dimensional stress system is applied to a soil mass. The stresses in the third direction, on the other hand, are irrelevant. As a consequence, the stress system is reduced to a two-dimensional model. Ordinarily, the simple strain conditions are considered, in which the strain in the third direction is zero. … Read more
The rate of flow in impervious soils is very slow and compression occurs gradually. The pore water pressure decreases as water escapes from the soil network. The dissipation of pore water pressure transfers the load to the soil skeleton in the form of inter-granular pressure, which is successful in causing compressive deformation of the soil … Read more
Today in this article we have discussed the primary compaction effect on soil properties which are generally occurred due to overall compaction process. The primary goal of compacting a soil is to enhance certain desirable properties such as compressibility, water absorption, and permeability, as well as increase soil strength, bearing capacity, and change in swelling … Read more
Soil Compaction is a method of stabilizing loose soil by densification, which can be achieved with either static or dynamic load. At constant water content, the process requires a permanent reduction in the amount of air voids. The most popular and least costly form of soil improvement method is compaction of soil. It improves the … Read more
Compaction and Consolidation are totally different processes. Although the result of both the process is same to cause reduction in the volume, but the process involved in both the technique is different. In case of compaction, the soil mass is applied with a dynamic load for small interval of time. This is generally done to … Read more
What is Seepage Pressure? When water flows through soil pores a viscous friction is exerted on it which causes transfer of energy between soil and water. This water pressure applied on soil which tends it to percolate is called as seepage pressure. It is generally represented by notation : ‘Ps’ Seepage Pressure Formula (Ps) : … Read more