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UN'F' D . S01L CLAsSIFIC _ AT10N ►rlsjor divisions Group symbols N +� o GW o �+ C e7 .t C O F N 19 r• GP � N J d m c �+ d o N c� c GM A in 3 ` o o =° A .'c. �2 �``0 -0 b ` a G C p4 � U Ib c .8 3W To O O M N 4 0 o 3 � N � M SP C �`02 n y � C d o c SM o u 0W ;4S ZX o` �' SC c ria V.2 a, u 1�C X �+ ► 'N 0 it" Typical names Well SYSTEM Laboratory clas3ification criteria •gradedgravels, gravel -sand mixtures, little or no lines it I °o /D30)2 Cu greater than 4; Cc■DtoX06 between 1 and 3 Poorly graded gravels, gravel. c _ ,and mixtures, little or no fines Not m _ I eeting all gradation requirements for GW L ` yy I Silty gravels, gravel -sandsiIt mixtures .N y y v Atterberg limits below "A" o 0 �j N line or P.I. less than 4 u c C7 to o o t Above q.' line with P.I. Clayey gravel -sand -clay m z 3 o betvveyn 4 and 7 are boh y y gravels, � a3 W dlerlinr mixturesc Atterberg limits above "A" Of requiring use e with Pof dual line • 1. greater than 7 symbols Ei Well -graded sands, gravelly 0 c sands, little or no fines a ° 060 n Cu greater than 6. CC. ` to c to)CD60 Detvvesn 1 and 3 y graded sands, gravelly o sand%, tittle or no fines 2 Poorl Not meeting all gradation requiremens. lot SW o ff_ C ' IT 9 Silt sads y .sand silt mixtures c 4, c Atterberg limits below "q" 3 Q .- ry u fine or P.J.t Q ;e ess than 4 e C Limits plotting in hatched c i, C - `�' t_v zone with P,1, beawean al Clayey sands, sand•clay mix. V C w f " o and 7 ate borck its+ caws cures .. _N j I in i �Atterberg limas above "A" requiring usa of dual Rym. O A � I lint with P.J. r boas. g cater than � Inorganic silts and very fine I ML sands• rock flour. silty Or clay• ey fine sands or clayey silts With slight plasticity 60 Inorpnic clays of low to me. r-, -it_Y Fat clasificaaor+ of fine grained CL ilium plasticity, gravelly clays, soils and fine fraction of coa Clads clays, Silty clays. loan 50 grained soils.• r� Clays Atterberg In hatched area are iborder in�ts Dio l Nos; i. OL Organic silts and or fkationC requiring use of dual clays of low t organic silty 40 Symbols.i p asticity u Equation of Aline; e PI■0,70 ILL • ?01 Inorganic silts,eous .� 30 MH diatomaceous fie sandy or u -. silty soils, elastic silts _ o 20 — ,.ip OH a MH CH Inorganic clays of high plas. ticity, fat clays CL 10 OH Organic flan of medium to 4 high plasticity. organic silts 0 0 t0 20 Pt Peat and other highly organic soils rL8 dot.. 30 40 50 60 70 80 90 Liquid Limit �� Plasticity Chart Inorganic silts and very fine I ML sands• rock flour. silty Or clay• ey fine sands or clayey silts With slight plasticity 60 Inorpnic clays of low to me. r-, -it_Y Fat clasificaaor+ of fine grained CL ilium plasticity, gravelly clays, soils and fine fraction of coa Clads clays, Silty clays. loan 50 grained soils.• r� Clays Atterberg In hatched area are iborder in�ts Dio l Nos; i. OL Organic silts and or fkationC requiring use of dual clays of low t organic silty 40 Symbols.i p asticity u Equation of Aline; e PI■0,70 ILL • ?01 Inorganic silts,eous .� 30 MH diatomaceous fie sandy or u -. silty soils, elastic silts _ o 20 — ,.ip OH a MH CH Inorganic clays of high plas. ticity, fat clays CL 10 OH Organic flan of medium to 4 high plasticity. organic silts 0 0 t0 20 Pt Peat and other highly organic soils rL8 dot.. 30 40 50 60 70 80 90 Liquid Limit �� Plasticity Chart 10 OH Organic flan of medium to 4 high plasticity. organic silts 0 0 t0 20 Pt Peat and other highly organic soils rL8 dot.. 30 40 50 60 70 80 90 Liquid Limit �� Plasticity Chart