Foundation Engineering Spring 2008 Definition of geotechnical terms Water oonteni,w=i EN/m3 peoaon3 (clay &ygrpa2a2weoeammgt92g7gnRwegn,unmRweon Determination of grain size distribution ometer l 01 200 Sueve 具 8 ,u… 0.000 0. 0 Grain size,mm clay silt I Sand Grovel 0.a2 0.06 2 MIT graded,clay,silt,sand,gravel ty, P00 6
Foundation Engineering Spring 2008 16
Foundation Engineering Spring 2008 Plasticity of soils plasticity inder)Ipww Low Medium Lgh Plasticily Clay 20 A-line 07320 5:l 0 20 80 Liquid limit w Keywords:plasticity index,shrinkage limit,plastic limit,liquid limit,water content Plasticity chart Volume,V ，Paslic ntend,w 9, a,4 Plaslicity indes,Ip-We Keywords:liquid limit,low plasticity,medium plasticity,high plasticity,A-line,clay,silt, plasticity index
Foundation Engineering Spring 2008 17
Foundation Engineering Spring 2008 Distinction between clay and silt Plasticlly 54 Clay Low “2 022分 Dilalansy ≥P High Low Dry strength Low hg Keywords:plasticity,settlement rate,dilatancy,dry strength,settlements,suspension Structure of clay Flocculated Keywords:dispersed,flocculated,positive charge,negative charge
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Foundation Engineering Spring 2008 Standard Proctor compaction test Dry unil weighH/m 221 18 0 500t2025 water condent,wh words:dry unit weight,dry density,maximum dry density,saturated,optimum water content.water content Proctors compaction tests 25g 05 457m 6% Ever Keywords:standard Proctor test,modified Proctor test,blows,layer
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Foundation Engineering Spring 2008 Compaction curves 22 221 5.t 20 6 4 2 Keywords:clay,silt,sand,till,standard,modified,water content,dry density Unified soil classification system aded Gravel .3 Gc-Clayey SW- well graded Sand 3P- 30 Sil (mo) ·ML Clay CL Low plasticity Or OL 生<50 CH High plasticity -0H Peat
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