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O <br />0 <br />_ <br />� <br />b <br />� <br />o <br />two <br />or <br />M <br />�p <br />a�a <br />Table 3.1 Average Effective <br />Shear Strength <br />of Compacted <br />Soils. <br />PROCTOR <br />COMPACTION <br />MAXIMUM <br />OPTIMUM <br />As COMPACTED <br />SATURATED <br />FRICTION <br />DRY <br />MOISTURE <br />COHESION <br />COHESION <br />ANGLE <br />UNIFIED <br />DENSITY <br />CONTENT <br />C. <br />Cut <br />Q' <br />CLASSIFICATION <br />SOIL TYPE <br />pcf <br />% <br />151 <br />tsf <br />deg <br />GW <br />well graded clean gravels, gravel -sand mixture <br />>119 <br /><13.3 <br />• <br />' <br />>38 <br />GP <br />poorly graded clean gravels, gravel sand mixture <br />>110 <br /><12.4 <br />• <br />>37 <br />�t <br />GM <br />silty gravels, poorly graded gravel -sand -silt <br />>114 <br /><14.5 <br />• <br />• <br />>34 <br />GC <br />clayey gravels, poorly graded gravel -sand -clay <br />> 115 <br />< 14.7 <br />>31 <br />SW <br />well graded clean sands, gravelly sands <br />11935 <br />13.3 ±2.5 <br />0.41 ±0.04 <br />3831 <br />SP <br />poorly graded clean sands, sand -gravel mixture <br />11022 <br />12.411.0 <br />0.24 ±0.06 <br />3731 <br />SM <br />silty sands, poorly graded sand -silt mixture <br />114 ±1 <br />14.530.4 <br />0.5330.06 <br />0.21 ±0.07 <br />34 ±1 <br />SM -SC <br />sand- silt -clay with slightly plastic fines <br />11931 <br />12.830.5 <br />0.21 ±0.07 <br />0.1530.06 <br />3333 <br />SC <br />clayey sands, poorly graded sand -clay mixture <br />11531 <br />14.730.4 <br />0.78.0. 16 <br />0.12 ±0.06 <br />3133 <br />ML <br />inorganic silts and clayey silts <br />10331 <br />19.230.7 <br />0.7030. 10 <br />0.09 ±• <br />3232 <br />ML -CL <br />mixtures of inorganic silts and clays <br />10932 <br />16.8 ±0.7 <br />0.6630.18 <br />0.233• <br />3232 <br />CL <br />inorganic clays of low to medium plasticity <br />108 ±1 <br />17.333 <br />0.91 ±0.11 <br />0.14 ±0.02 <br />28 ±2 <br />OL <br />organic silts and silty clays of low plasticity <br />MH <br />inorganic clayey silts, elastic silts <br />82±4 <br />36.333.2 <br />0.7630.31 <br />0.21 ±0.09 <br />25 ±3 <br />CH <br />inorganic clays of high plasticity <br />9432 <br />25.531.2 <br />1.0730.35 <br />0.12 ±0.06 <br />1935 <br />OH <br />organic clays and silty clays <br />• <br />• <br />' <br />*denotes insufficient <br />data. > is peater than, < is less than <br />(After Bureau of Reclamation, <br />1973; 1 pcf =157.1 N /td, 1 tsf-95.8 kPa) <br />