Classification of soil is important for environmental control and construction purposes. Soil classification is based on several factors such as absorption, the ability to shrink or swell, water retention and permeability. Most of these factors independently correlate with the particle size of the soil. The clay fraction, the smallest fraction (0-2 micron), is indispensable in assessing soil quality. The clay fraction is measured according to for instance ISO 11277 and allows the soil to be categorized within stated classes.
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PT Unitama Analitika Perkasa was established in 1997 and started operating in 1998.