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Plasticity Chart <br />60 <br />For classification of fine- rained soils / <br />and fine-grained fraction o coarse-grained <br />.. soils. <br />H 50 . . <br />a Equation of A -line <br />Horizontal at 1)I=4 to LL=25.5, <br />X <br />w then PI -0.73 (LL -20) <br />Z Equation of °U" -line <br />Z <br />Vertical at LL=16 toPI=7 <br />/ G <br />r then PI=0.9(LL-8) <br />30 / <br />a 20 / MH OR OH <br />J <br />OL <br />! <br />10 _ MLOROL <br />40 0 60 <br />70 <br />00 10 1620 LIQUID LIMIT (LL) <br />90 100 110 <br />References <br />American Society for Testing and Materials, 2011. Standard Practice for Classification of Soils for <br />Engineering Purposes (Unified Soil Classification System). May 1. <br />Peck, Ralph B., Foundation Engineering, Second Edition, John Wiley & Sons, 1973. <br />Page 2 of 3 <br />Penetration Resistance and Soil Properties (Peck, et al) <br />Clays <br />Blows foot (N) <br />Sands <br />Relative Density <br />Blows per foot N <br />p ( ) <br />Consistency <br />per <br />Less than 2 <br />Ver Soft <br />y <br />0-4 <br />Very Loose <br />2-4 <br />Soft <br />Medium <br />4-10 <br />Loose <br />4-8 <br />Stiff <br />10-30 <br />Medium <br />8-15 <br />15-30 <br />Very Stiff <br />30-50 <br />Dense <br />Over 30 <br />Hard <br />Over 50 <br />Very Dense <br />Plasticity Chart <br />60 <br />For classification of fine- rained soils / <br />and fine-grained fraction o coarse-grained <br />.. soils. <br />H 50 . . <br />a Equation of A -line <br />Horizontal at 1)I=4 to LL=25.5, <br />X <br />w then PI -0.73 (LL -20) <br />Z Equation of °U" -line <br />Z <br />Vertical at LL=16 toPI=7 <br />/ G <br />r then PI=0.9(LL-8) <br />30 / <br />a 20 / MH OR OH <br />J <br />OL <br />! <br />10 _ MLOROL <br />40 0 60 <br />70 <br />00 10 1620 LIQUID LIMIT (LL) <br />90 100 110 <br />References <br />American Society for Testing and Materials, 2011. Standard Practice for Classification of Soils for <br />Engineering Purposes (Unified Soil Classification System). May 1. <br />Peck, Ralph B., Foundation Engineering, Second Edition, John Wiley & Sons, 1973. <br />Page 2 of 3 <br />