What is determined in a consolidation test?

Consolidation test is used to determine the rate and magnitude of soil consolidation when the soil is restrained laterally and loaded axially. This test is carried out on saturated soil specimens, especially in cohesive soils.

What important parameters are obtained from performing a consolidation test?

Compression and swelling index parameters, obtained from consolidation test, are used to calculate settlement for normally and over-consolidated soils respectively.

How do you carry out a consolidation test?

Consolidation test consists of applying the pressure on a thin soil specimen in increments and keeping each pressure increment for sufficient time until the consolidation of the soil specimen and measurement of the vertical deformation of the soil specimen due to expulsion of pore water.

What are the three stages of consolidation?

Compressibility and consolidation of soil are crucial parameters required in the design considerations. The consolidation of soil is divided into three stages including initial consolidation, primary consolidation, and secondary consolidation.

What is the process of soil consolidation?

Soil consolidation refers to the mechanical process by which soil changes volume gradually in response to a change in pressure. As water diffuses away from regions of high pressure due to seepage, the soil matrix gradually takes up the pressure change and shrinks in volume.

What is the aim of consolidation?

To consolidate (consolidation) is to combine assets, liabilities, and other financial items of two or more entities into one. In the context of financial accounting, the term consolidate often refers to the consolidation of financial statements wherein all subsidiaries report under the umbrella of a parent company.

What are the different types of consolidation test?

3 Different types of consolidation testing The most common of these is the one dimensional consolidation test which is commonly referred to as: consolidation test, oedometer test, and incremental loading oedometer.

What is the reason for time lag in consolidation tests?

(i) The time lag in consolidation is entirely due to the low permeability of the soil.

What are the components of consolidation?

Primary consolidation (or simply consolidation) is on account of flow of water from the voids, and is a function of the permeability and compressibility of soil. Secondary compression is on account of creep-like behaviour. Primary consolidation is the major component and it can be reasonably estimated.

What is the purpose of consolidation of soil?

Compressibility of clays is mainly caused by expulsion of water between the soil grains and slipping of particles to new position to attain greater densities. Consolidation plays an important role in stability analysis for the embankment, footings or a column constructed on clayey soils.

What does primary consolidation depend on?

These proportions are dependent on the cycle duration, load increment ratio, rate of secondary consolidation, method of sampling, size of sample, the type of time versus compression curve used and the interpretation adopted for the zero point for the Primary consolidation versus log time curve.

What kind of test is the consolidation test?

The Consolidation test is also referred to as Standard Oedometer test or One-dimensional compression test. This test is carried out on saturated soil specimens, especially in cohesive soils.

What is the name of the soil consolidation test?

The testing procedure to quantify the critical soil properties associated with soil consolidation is the Oedometer Test. The term “Oedometer” derives from the Ancient Greek language and means “to swell”. The test is one of the most commonly conducted, and important, laboratory tests in geotechnical engineering.

How to do a consolidation test in water?

Place the filter papers between porous stones and soil specimen. Press very lightly to make sure that the stones adhere to the sample. Lower the assembly carefully into the base of the water reservoir. Fill the water reservoir with water until the specimen is completely covered and saturated.

How to calculate void ratio in one dimension consolidation test?

In one dimension consolidation test, the soil sample is constrained so that it can only settle axially. Different loads are added from day one to day five and the change in height of the soil samples are measured. The void ratio and the void ratio changes can be calculated using the following equation: ∆� � = ∆? (1+?)