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' r1 � � r � <br /> CL:�S�iFiC�.�(v(� i F S�7ILS =�R �:���S�JE���i1lG PJFc'.�Sc� <br /> ' LLSTM Designation: D 2487 -69 AND D 2488 - 69 <br /> (Unified Soil Class;fication System) <br /> ' GfOUP T ical names I CSassification criteria <br /> Major divisions Symbols YP <br /> C = D60 greater than 4: <br /> � Weti-graded graveis and m U Dio <br /> y Gi+V gravel-sand mixtures. litt(e ' (D3o12 <br /> � � y C = between 1 and 3 <br /> o � or no fines c T Z Qto x06o <br /> — � N <br /> U <br /> � m C � �O <br /> ' �-•y m Pcorly graded grave!s and � � <br /> m Q V G? gravel-sand mixtures, li;tle � V � � Not meeting both c:iteria for G'N <br /> � a a or no fines n " R m <br /> m�Z m 3 � � � <br /> ' - a o m ,� `" c ca AtterEerg limit5 belew <br /> > � m� c Silry gravels, grave!-sand- a �% �� •� ••q•• line or P.l. less qTterber I i m i ts fot- <br /> m o m - G1A `a C7 C7 m � 9 P <br /> , -y E = si it mi xiures m ? � than 4 ting in h a t c h e d area <br /> 0 o m � - � � �,�j � 9 are border/ine cSassifi- <br /> , N 3 c : : : cations requiring use <br /> m o � y m Atterberg limits above <br /> ° � m C I a e r a v e!s. gravel- � . of dual symbols <br /> �Z > GC Y Y 9 Q .•A•• line wi� P.1. <br /> � �o sznd-clay mixtures . . . greater tfian 7 <br /> m ° c7 c . . . <br /> c y <br /> , � y • <br /> ��W Well-graded sands ard gra- > > � Cu= D'� 9reat=r than o; <br /> Dio <br /> N � � y S'N velly sar,ds. lirl� or no = ° �n C���2 <br /> � y fines � " c > Cz= � ba;ti•:esn 1 and 3 <br /> co �,.? — q y m �1 0 X ri 5 0 <br /> U� � C o c��+ ; in <br /> ' � m m > m Poorly graded sands and � Z z o . , <br /> ' � �•y U $? gravelly sands, little or no = � y N Not meeting both c:iteria ior S'JVI <br /> O N U � fines ai � '�— Z <br /> ' � _7• - p C ?° y � <br /> ° ;, � ^ y <br /> q �Z L. <br /> v� a' N N ^ `� Atterberg linits tY_lo�v <br /> � N c c;�� Si Iry sands, sand-si It �n�x o � � •q" I ine or ?.I. fess Atterberg (i m i t s plot- <br /> c �n .�. tures = = `� than 4 ting in h a t c h e d area <br /> � � <br /> , � ` « y O O , <br /> ' are border/ine c!assifi- <br /> m 3 � � � cations requiri�g usz <br /> o N Atterberg Iimits above of dual symbofs <br /> � � SC Clayey sands, sar,c-c'ay 'A" line with P•I• <br /> � mixtures greater :han 7 <br /> ' � <br /> Plasticity C:�art <br /> Inorganic silts, very fine 6G <br /> N h1L Sonds. rock flour, Si Ity or � <br /> ' o C'.ayey fine sands For classification of fine-grained <br /> 4 o soils and fine fraction of coarsa- <br /> � ae Inorganic clays of low to 5�_ grained soiis. <br /> c `,`.' CL medium plasticity, gravel ly Atterberg L i m i t s p I o Lt i n g in C� <br /> , �V clays, sandy ctzys, silry hatu-'ied area are borderline <br /> Y_E clays. lean ctays classifications requiring usa of <br /> m � � 4: dual symbols. <br /> `� � Organic s i I ts and ory-anic = Equation of A-line: <br /> y N � �� silty clays of low pias:icity '� PI =i.73 (LIL-20)I I � <br /> � o � JO � <br /> 0 <br /> m <br /> m m o Inorc,�anic silts. micaceous m '��c OH and MH <br /> � m m � MH or diatamaceous fine sands °- ;P � <br /> ' � o� m or silts. efastic sils 2� <br /> � cm� �� CL <br /> • LL p V m <br /> ' � -o m Inorganic clays of high 10 <br /> ' � a m � CH Plasticiry, fat clays � <br /> � � y "' 4_ CL-ML ML and OL <br /> i `n in E / <br /> ; � Organic elays of inedium to �� �p 20 30• 40 50 60 70 , 80 90 100 <br /> ' ! a OH high ptas:iciry ` " . <br /> � Liquid Limit <br /> 1 U <br /> T.^ Ul �072. T.�C�< Zf1L� G'!'�• hiCli�r <br /> ' : _r"p y rt organic soils •3ased on the material passing cie 's in. (76 m:n} sieve. <br /> = O i <br />