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UNIFIED SOIL CLASSIFICATION SYSTEM AMERICAN �
<br /> ASTM Desigrr�ations: D 2487,D2488 ENGINEERING
<br /> TESTING, INC. ��
<br /> Soil Classificanon Notes
<br /> Cncena Cor Assien�ne Group Symbols and Group Nama Usmg Labora[ory Tesa" Group Group Name "Based on the marerial patsine the 3-in
<br /> Svmbol (75-mm) sieve.
<br /> Coarse-Gra�ned Gravels More Clean Gcavels Cu�1 and 1<Cc<3 GW Well graded gravel' eif field sample contained cobbla or
<br /> Soils NSore than�0%coarse Less than 5% boulders,or both, add"wich cobblcs or
<br /> than 50% fcac:ior, reea«ed fines� Cu�4 andlor 1>Cv3` GP Poorlv gr�..dc.+�ve! poulders,ar b;,tt;"[o grcup�ame.
<br /> re[ained on on No.4 sieve �Gmvels wi[h�[o[?%ftnes require dual
<br /> No.Z00 sieve Gravels with Fina classify as ML or MH GM Silry gravel` ���5:
<br /> Fines more � GW-GM we[I-graded grave!wi�h silt
<br /> than i_/o fines Fina dassifi•u CL or C� GC Clayey gavel GW-GC well-graded grdvel with ct�y
<br /> GP-GM poorly�rraciicd etavcl with silt
<br /> Sands 50%or Clean Sands Cu?6 and 1<Cc<3 SW well_eraded sand GP-GC poorly graded eavd wrth clay
<br /> more of coarse Less than 5% °Sands wiih 5 to 12°/a fines reqoire dual
<br /> frattion passu fines° Cu<b ar 1>Cv3 SP Poorfy-gracied sand symbols:
<br /> No.4 sieve SW-SM well-graded sand with sift
<br /> Sands with Fines clazsify as ML or MH SM Silry sand 5W-SC well-graded sand with c[ay
<br /> Fines more SP-SM poorly graded sand with silt
<br /> than 12%fines° Fina classi as CL or CH SC Cfavev sand SP-SC poorfy graded sand wi[h clay
<br /> Fine-Gramed Silts and Clays inorganic PI>7 and plou on or above CL I.ean cla
<br /> Soils SO%or Liquid limit lus "A"fine� (D���:
<br /> more pazses than 50 PI<4 or lou below ML Sil ECu=D6olDu,, Cc=
<br /> the No.200 "A"line� �
<br /> sievt Dioz D�, �
<br /> organic Liouid limit—oven dned��S OL Organ�c cla
<br /> Liquidlimit—notdried o Flfsoilcontains>IS%san�add"with
<br /> (see Platticity Organic silt� sand"to group name.
<br /> Chart below) �[f fines classify az CL-ML,use dual
<br /> Silts and Clays inorganic PI plou on or above"A"line CH Fat cla s�mbol GC-Glv�or SGSNL
<br /> Liquid limit 50 If fines arc organic,add"wirh organic
<br /> or more P!ploa below"A"tine MH Elasuc sil fina"to group name.
<br /> �Ifsoil contains>IS%gravel,add`�vith
<br /> organic ��puid limit--oven dried�p 75 OH Organic da gravel"to group name.
<br /> Liquid limit—not dned Q jlf Atterberg(imiu plot is hatched are�
<br /> Organic silt�'`i soils is a CL-ML silty clay.
<br /> Highly oroanic Primarily organic matter, dart: PT Pea �'If soil conrains I S to?9�o plus No.200
<br /> soil in color,and or�anic in odor add"with sand"or "wich gravel".
<br /> wh�chevcr is predommant
<br /> s�vE uu�rs�s m �[f soil contains>30%plus No.200,
<br /> .�,m..a�n,_,...�...�_� predominanUy sand,add "sandy/'[o
<br /> �a h.�,v m.,..s.�.o.d.
<br /> �r o�n + a w x n m +.o�o � group name.
<br /> 'm' '' '' ; � � I i� s � �v,�-F-�,,, 1 "�tf soil contains>30%plus No-200,
<br /> :1,i ; - MovailR.amLL�HS af"' f2dORLI12f1I� V
<br /> �� � i I i I �� � o,,,R.n��-� ��' � P Y� el,add "gravefly"
<br /> � �i I ' j I � � j '� � � '� to group name_
<br /> �a} ' : i+ ;o,'„y,;,, ; , � �� � � v:v u eA=; I , �. I �Pb4 and plo[s on or above"A"line.
<br /> a �i �� ' I`� { i I I �`� � b °�R�aD�u,� G °Pf<4 or plocv below"A"line.
<br /> � j ; � i , ( I � . I F PPI plocc on or abovc"A"line.
<br /> � � l i I � i p.:zs.�I � � m �' I QPI plors betow"A"[ine.
<br /> , �, � Fiber Content dacripuon shown below.
<br /> I` I : I I I C; OH�M
<br /> n � ' � ( � m
<br /> U«RQt'a.n
<br /> �, ;' � i I I I i I ! ,� : - ML�OL
<br /> . n •, •, °o ,o ro a m m so m �u eo 00 ,ro no
<br /> �°A�'���'"'"""�5 uano u�.sr a.0
<br /> G�0.•YnIDS•m G. IdY i .i6
<br /> o-•d�•,s Plazucity Char[
<br /> ADDITIOPtAL 1'ERMINOLOGY NOTES USED BY AET FOR SOIL IDENTIF1CA7701Y AND DESCRIPTION
<br /> Gram Size Gravel Percen[aees Consistenct�of Plastic Soils Relative Densitv of Non-Plastic Soils
<br /> Tertn Particle Size Term Percent Tertn N-Value.BPF erm N-Velue.BPF
<br /> Boulders Over IZ" A Little Gravel 3%-14% Very 5oft las than 2 Very Loose p_y
<br /> Cobbles 3"to 12' Witfi G�avel IS%-29% Soft 2-4 Loose 5-1D
<br /> Gravel {t4 sieve to 3" Gcavelly 30%•50% Firm 5-8 Medium Dense f 1-30
<br /> Sand �200 to#4 sieve Saff 9-l5 Drnce 31-50
<br /> Fines(silt&clay) Pass�200 sieve Very Stiff 16-30 Very Dense Greater than 50
<br /> Hard Greater than 30
<br /> MoismrdFrost Condnion Laverine No�es I Fiber Con�en[of Peaz OreanidRooa Descnu[ion(if no lab rests)
<br /> (MC Column) Laminations: Layers less than Fiber Content Soits are dacribed as nrronic,if soif is not peat
<br /> �(uryj. i�th�uc of muistwe,�i-m�ty,dry w 'l," �.�c��a: ";e�^; (`.rises!e•r:•••�••� a.^.d s jedped •r F�av? suffic�en! organic fines
<br /> iouch. differing ma�eria! �+ ~� conrcnc to influence the soi!propertia. li hdi�
<br /> M(Moist): Damp,although frer water noc or color. Fibric Pcat Grearer than 67% orranic used for bordedine c�sa.
<br /> v�sible. Soil may still have a high Hemic Peat: 33—67%
<br /> �vater con¢nt(over'optimum"). Lenses: Pockea or layers Sapnc Pear. Less than 33% With roots: Judged to have sut�cient quantiry
<br /> w(weV Free wa[er visibfe in[ended w greaur than Y:" af roots to influence the soil
<br /> �Naterbearing): describe non-pluUc soils. [hick of difFuing propertiu.
<br /> Wazerbearing usually rela[cs[o ma[erial or color. Trace roo[s: Small roo[s presrn4 bu[no[judged
<br /> sands and sand with silt �o be in sufficient m
<br /> F(Frozen): Soil iroun ��
<br /> significanU}•affm soil proper[ies.
<br /> OlCLS021(2/04) ANIERICAN ENGINEERING TESI'ING,INC.
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