Soil Laboratory Testing

(a) MOISTURE CONTENT
To determine the amount of water present in a soil expressed as a percentage of the mass of dry soil. This is termed the moisture content of the soil.

(b) ATTERBERG LIMIT
Atterberg limit consists of three component testing, such as liquid limit, plastic limit and plasticity index.

(c) HYDROMETER (WET SIEVING)
A particle size distribution analysis is a necessary classification test for soils, especially coarse soils, in that it presents the relative portions of different size of particles.

(d) DRY SIEVING
Dry sieving enable a continuous particles size distribution curve of a soil to be plotted from the size of the coarsest particles down to clay sizes.

(e) CRUMB TEST
Crumb test is a quick method for identification of a dispersive clay soil.

(f) SPECIFIC GRAVITY
The specific gravity of a substance is a comparison of its density to that of water.

(g) LOSS ON IGNITION
The Loss on Ignition Test is designed to measure the amount of moisture or impurities lost when the sample is ignited under the conditions specified in the individual monograph.

(h) COMPACTION TEST
Soil compaction is defined as the method of mechanically increasing the density of soil.

(i) SOAK CBR
California Bearing Ratios Tests are usually carried out as "soaked" tests. A sub-sample is first compacted at various moisture contents to determine its maximum dry density and optimum moisture contents.

(j) ONE DIMENSIONAL CONSOLIDATION TEST

This method describes a procedure for determining the rate and magnitude of consolidation of soil when it is restrained laterally and loaded and drained axially.

(k) CONSTANT HEAD PERMEABILITY TEST
Permeability is a soil property indicating the ease with which water will flow through the soil.