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Table 11. Average Effective Stress Shear Strengths for Compacted Soils Unified Classifi- cation Soil Type GW GP well graded clean gravels, gravel -sand mixtures GM poorly graded clean gravels, gravel -sand mixtures silty gravels, poorly graded gravel -sand -silt GC clayey gravels, graiel-sand-clay mixtures SW well graded clean sand, gravelly sand SPpoorly SM grade, clean sand, sand -gravel mixtures 'Z__ -SM s sands, sand -s t max ure sand -s -c SC ay w s g astic fines clayey sands, poorly graded sand -clay mixtures ML - inorganic silts and clayey silts - mixtuz a s < 13.3 'nor anic clays of low to medium plasticity OL MH organic s s an s city inorganic clayey silts, elastic silts CH inorganic clays of high plasticity OH organic clays and silty clays Maximus Unit W pcf > .19 > -10 > _14 > :15 119 ± 2 X110 ± 114 ± _ 119.± 115 ± ' 103 ± 2 109 ± 108 ± 82 ± ; 94 ± 2 * 'roctor Compaction' Friction tightater DryT19.4 imum Void Ratio Cohesion= C. Angle 01 kN/='ntent $ e, kgf/cm2 deg > < 13.3 * * > 30 > 18.0 < 12.4 * > 37 > 18.6 < 14.5 * > 34 > 18.8 < 14.7 * * > 31 19.4 ± 0.3 13.3 ± 2.5 0.37 ± * * 30 ± 1 18.0 ± 0.2 12.4 ± 1.0 0.50 ± 0.03 •+ IL 1 18.6 ± 0.2 14.5 ± 0.4 0.48 ± 0.02 0.21 ± 0.0734 ± 1 19.4 ± 0.2 12.8 ± 0.5 0.41 ± 0.02 0.15 ± 0.06 33 3 18.6 ± 0.2 14.7 ± 0.4 0.48 ± 0.01 0.12 ± 0.06 31 ± 3 16.6 ± 0.3 19.2 ± 0.7 0.63 ± 0.02 0.09 t * 32 ± 2 17.6 ± 0.2 16.8 ± 0.7 0.54 ± 0.03 0.23 ± *+ 17.6 ± 0.2 * 17.3 ± 3.0 * 0.56 ± 0.01 0.14 ± 0.02 28 ± 2 13.4 ± 0.7 36.3 ± 3.2 * 1.15 ± 0.12 * 0.21 ± 0.09 25 ± 3 15.3 ± 0.3 * 25.5 ± 1.2 * 0.80 ± 0.04 I * 0.12 ± 0.06 * 19 ± 5 * * denotes insufficient data, > is greater than, < is less than Maximum liquid limit for the MH soil 814 Maximum liquid limit for the CH soil 884 'USBR standard compaction. Energy per unit volume equivalent to AASHTO standard compaction. 2From specimens compacted to maximum dry unit weight and optimum water ccntent. Specimens saturated before shear. .T 11, DvNc�94v/ AL. I Oil 66-4 Y (._ (e(.)