Explain plasticity chart. Give the procedure for classification of a given soil by plasticity chart
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A graph between liquid limit and plasticity index in percentage that can be used for classifying fine-grained soils as per the Indian Standard Soil Classification Systems called a plastic chart. According to it if more than 50% of soil passes through a 75micron sieve, then it is classified as fine-gRead more
A graph between liquid limit and plasticity index in percentage that can be used for classifying fine-grained soils as per the Indian Standard Soil Classification Systems called a plastic chart. According to it if more than 50% of soil passes through a 75micron sieve, then it is classified as fine-grained soil.
 The procedure for classification of a given soil by plastic chart according to ISSCS is a plasticity chart, depending on the values of liquid limit (WL) and plasticity index (IP). The ‘A’ line is illustrated as IP is  0.73 (WL – 20).  fine soils are split up into clays(C), silts (M), and organic soils (O). High plasticity: WL> 50% Low plasticity: WL< 35% Intermediate plasticity: 35% < WL< 50%.
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