How to Use the Plasticity Chart | Everybody MUST Know to Classify Soil 

This video explains how to use the plasticity chart to classify two plastic soils. Soil 1 0:01:24 Soil 2 0:02:10. The A-line defines the boundary between clay (above the line) and silt (below the line). In some cases when you can't visually deicide of the point is above/below or right on the A-line, you can use this relationship that PI must be greater than 0.73x(LL-20) for soil to be classified as clay.
Watch this video to learn how to conduct a liquid limit test • Liquid Limit Test | At... . Watch this video to learn how to conduct a plastic limit test • Plastic Limit Test | A... . See this video • How To Read Borehole L... to learn how the soil plasticity symbols are used in borehole logs.
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