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UNIFIED SOEL CLASSIFICATION <br /> Group <br /> wjatr DFsi�om Typical taamet Laboratory ckassificatioa Qiteria <br /> GV1, Weil-grades gravels gravel-sand Cu-D=greater than 6:Cc<(D'J� between I and 3 <br /> c <br /> mixtures. little or no fines O.. D.atD— <br /> ` ' rPoorly graded gravels,gravel- „ c <br /> c GP sand mixtures,:iuk or no fines Not meeting all gradation requirements for GW <br /> _ V _O <br /> = ` Z — Get d �. <br /> .. — Silty gravels,gravel-sand elft = 3 Atterberg limits below <br /> a� e _ — mixturts = line or P.I. less than a <br /> A / u .: a Above •A' lire with P.J. <br /> ::�::? between 3 and 7 are bor- <br /> t Z 3 = w deri— .zses requiring use <br /> e C: a <br /> Atererg limits abve"A"GC Clayey�gravels.gravel-sand-cby of dual symbols <br /> t o n r mixtures =_ line with P.I.greater than 7 <br /> ;L.2 <br /> G w <br /> SW Well-graded sands. gtaselly — e Cu=D=grease than a:Ce.(D'-e bet-e-n 1 and 3 <br /> sands.little or no fines a D. D.tD_ <br /> : 3 <br /> Y "'= SP Poorly graded sands.gravelly : <br /> sands little or no lines c 3 -Not meeting all gradation reauiremm%for SW <br /> "J V <br /> t Z O �` y <br /> C Y <br /> t = ? SM dc= Anerberg limits below "A'• <br /> _ Q _ Silty sands.sand-sat c :, <br /> matures a� - line or P.I.las than s Limits plating in hatched <br /> u t o c zone with P.J. between s <br /> 3 = YC J L N and l am borderline cases <br /> a;5 requiring use of dual sym- <br /> SIC <br /> Clayey sands.sand<lay aix- 4_ AtsQ�g limits above•A" boas <br /> < lures X^'o line with P.I.gr Mur than 7 <br /> Inorganic silts and vm fine <br /> HL sands.rock flour.silty or darn• <br /> fine sands or ciavev silts with60 t t <br /> slight plasticity For etusifi=ton of fax-grained <br /> .�. wds and fine fraction of coarse- <br /> I <br /> C Inorganic clays of l(r-to me• s0 graifed;,ails. <br /> z dium plauicity,gravelly days Atterberg Limns plotting in + t <br /> �+ hatched area are bonle!ltne [lass•CL <br /> M 1 1 <br /> sandy days.Silty'days.lean <br /> ifieattorts requiring use of dual i <br /> c <br /> Y / .= days 40 tyntoots. I t <br /> Ec aticn of A4ww: t <br /> ,�.. PI X0.'3 tLL-St t <br /> e ' OL Organic sibs and organic silty <br /> Z _ class of low plasticity 10 1 <br /> r <br /> s s t <br /> • Inorganic sills.mxauww or (nM"aa0 MM <br /> l <br /> a SIH diatomaceous free sandy or 4 20 t <br /> Silty soils.elastic silts t l <br /> i t CL t t <br /> s,a _ t <br /> e v CH Inorganic days of high pias- 10 t <br /> may.fat days 7 s <br /> 7 = 4 ___ct►3i��1� MI.w etc <br /> . <br /> e S OH Organic days of medium to 0 10 70 70 40 50 60 70 10 90 100 <br /> _ j Nigh plasticity.orgartsc silts <br /> S=_ Pi Peat and Other highly or ac Liquid Urut <br /> o` g stotl: Ptastt•:uy Gert <br />