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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> Criteria for Aaalgnrtg Group&'~a and Group Names Using Laboratory Texts' Sod ClueHlcatbn <br /> Group <br /> Symbol Group Name <br /> Coarse Grained S0419 Gravels Clean Gravels Cli 2♦and 1 T.OC S3' GW well-graded gravel <br /> More than 50%retained More than 50%of coarse Law than 5%Anse- Ou<♦andlor 1>Oc>Y GP Poorly graded gravel <br /> fraceon retained on -- --- <br /> n No.200 aiave No.♦suave Gravefa wah F,nes More FWM classify a9 MiL or MH GM s,iy gravel <br /> than 12%+nee fines classify as CL or CH GC Clayey gravel <br /> Sands Clean sends Cu 6 and 1 s Cc s 31 SW Well-graded sand <br /> 50%or more of coarse Less.than 5%fines- CL<6 BMW 1>OC>3' SP Poorly graded send <br /> hecaon passes <br /> No.♦aim Spa win Fyn f3ries classify as Ml or MH SM Sdty send'" <br /> More than 12%Men" Firm Gasa'y as CL or CH SC Clayey Banc" <br /> Firte-G►alned Sole Sets and Clays merge PI>7 and protS on or above'A'Ina' CL Lean day, • <br /> 50%or more passes the Liquid lift less than 50 PI c♦or plots below'A'NrW ML Sr <br /> No.200 slave <br /> organic Liquid Nmd-oven dried n, <br /> c 0.75 OL Orga :clay' <br /> IiWid Nml1-not O'lad Organic ae—' <br /> Sets and Gaye inorganic PI plots on or above'A'line CH Fat clay' <br /> Liquid We 50 or more <br /> PI blots bebw'A'line MH EteaeC S111" <br /> organic Lquid Nmft-oven dned Organic clay` <br /> c 0.75 OM <br /> Liquid NmN-not&,ad organ:sill' ` <br /> Holy organic socis Prananly organic maser,dark in color,and organic odor PT Peet <br /> 'Based on the material passing the 34n.(75-mn)owe '11 fines are organ:,add'with organic fries'to group name. <br /> It field itemple corrained cobbles or boulders,or both,add'with cobbles ' N eon contains z 16%gravel,add`with gravel'to group name. <br /> or boulders,or bah'to group name. 'N Anerberg limits plot in shaded area,soil is a CL-ML,silty day. <br /> Gravels mist 5 to 12%fries require dual symbols: GW-GM well-graded "N eon oontans 15 a 2g%plus No.200,add'two sand of lvith <br /> gravel with sk GW-GC wa&Vaded gravel with day.GP-GM poorly gfBVel-'vvhkhaver is predominant <br /> graded gravel with ail.GP-GC poorly graded gravel with day. L if WA_ <br /> aa lo %ate toWoup 30%plus No.200 predominantly sand.add <br /> Sle with 5 12%tines nequre dual syn+bda: SW-SM war-graded name. <br /> said with sit,SW-SC well-graded sand with day.SP-SM poorty graded <br /> said with sit,SP-SC poorly graded sand with clay 11 eon contains z r plus No.200,predorninerttly gravel,add <br /> 'bravai�'to group nkame. <br /> Cu=OwlD,a Cc= (Div) wPl 2♦and pots on or above'A'be. <br /> D,o x Dw °PI<1 or plots below'A'line. <br /> If soil contains 2 I S%Bard-add"with sand to group name. 'PI plots an or above'A'line. <br /> 'fifes desedy as CL-ML,use dual symbol GC-GM,or SC-SM. °PI plots bob*'A'line. <br /> so <br /> For clasaMleatlon of Itne-grained <br /> soils and lit"neined fraction ' <br /> 00 of,caar"rained wills �Tp <br /> SQUO n d•A' Iry AS <br /> Horizontal at Ptol to LL-M.5. <br /> xW 40 ewnPI.473(LL•20) • �l` <br /> p Equation d V trove � �d <br /> Z velioal fill LL-1600,7, <br /> 30 than PI.O a(LLB /If <br /> U 23 <br /> MIN or ON <br /> 10 J <br /> 7 --- <br /> ♦ ML or OL <br /> 0 ' <br /> 0 tb I6 20 30 40 5U so 70 80 90 100 110 <br /> LIOUID UM1T(ILL) <br /> K lo-i <br /> VxGTxRRRTxG <br />