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�' CLASSIFICATION OF SOILS FOR ENGINEERING PURPOSES <br />— . ASTM Designation: 0 24s� - s5 SOIL ENGINEER�NG <br /> (Based on Unified Soil Classification System) <br /> Soi�Gassiiicatton <br />_ Criteri�lor Assi9ninfl Group Symbols arM Group Nemes U�inp Laboratory Teats" Group � <br /> S�� Group NamaB <br /> Coarse-Greined Soils Graveb Ckan Graveb Cu14 and 1S�S� GW Well greded grevslf <br /> More than 50%retained on More than 50%coars� Lsss than 596 Rnss� <br />� No.200 siew fraction rotainad on Cu<<and/or 1>Cc>3E GP Poorty praded gravelf <br /> � No.t sievs <br /> Gravsb with Fnes Fnea elassify as ML or MH (iM Silty pravelf.o�+ <br /> More ttun 12%tinss� , <br /> Finee classify as CL or CH GC Cleyey pawif•aN <br /> Sands Cban Sands Cu>8 and 1S�S� SW Weli�ynded sand' <br /> 50%or moro of coan� Lesa than 5%fines� <br /> iract'an panses No. Cu<8 and/or 1>Cc>3f SP PooAy graded sand� <br /> 4 sieve <br /> Sanda with Fines Finp classify as ML or MH SM Sitty sand�•K� <br /> More than 12%Nnet� <br />' Fnee classify as CL a CH SC Claysy sand°�a <br /> Fnelirainod Soils Silts and qays inorpanic PI>7�nd piots on or abov� CL Lean ck�W <br />, 50%or mo►s pasees th� Liquid limit Isss than 50 "A"Nrw� <br /> r NO.200 aNw <br />._ PI<1 or pbq belcw"/�'• ML Sil�� <br /> line� <br /> or0anic Liquid IimR-ws�dried OL Orpanic da�-"'�N <br /> <0.75 <br />` Uquid IimR-nol drisd Orqank Nlt�-µo <br /> Silts and Clay� inorpanic p�pb�p�pr�pya��q�•Iine CH Fat cla�µ <br /> Liquid limit 50 or more <br /> _- PI pbta below•'A••line MH Elastic silt"u-~ , <br /> orpanic Liquid limit•oven dried OH Orpanic da�KP <br /> <0.75 <br /> L'puiE Umit-not dried <br />_ ' Orpanic sitt"«~.o <br /> Hiyhly orqanic soils Primerily organic matter,dark in color,and orqanie odor PT Peat <br /> Fibric Peat > 6796 Fibers Hemic Peat 3396-6796 fibers , Sapric Peat < 3396 Fibers <br /> �Bas�d o�1M rr�tKitl pwinp!M 3in.(7'Smm)Wv�. � <br /> BM fiek s� ECu - D /D Ce. (��0) �If An�rb�ry limits pbt in hneh�d anti�ou Is a CI�IL. <br /> mp�e eontain�0 eobbl�s a bould�rt.a both.add eo ro D .a tilry elay. <br /> 'tivilh cobbin a bould�n.a bdh"to proup narn�. ro eo Ktl wN cartairo 15 ro 2g96 plw No.200.add"wiM�arW• <br /> �G�Rwk wiM S a 12�6 t!nu nQuin eual rYmb�; fM wi earnalrNZ/5%w+d.�dG'1w1M wrW"a qroup a•1vitA pnv�l;'w�hieMvw M pndominu�t. <br /> GWGM wrllyndW pnvN with rilt mny, Lfl wil conuituZ30%plus no.200.Or«1ani�anuY M�d. <br /> GWGC w�11yrWW prwN w4h Nay �M fir�cWsity u CL�#IL,uw dwl�ymbol GC13M,a �dd"�andy"to 10 proup n�m�. <br /> GP-0M D�Y O�WW 9rav�1 wiM NI1 SGSM. ~M�al oonhina,L30%plw No.200.pWanin�ntlY. <br /> D GPGC poay pnOW pravN with daY NII MM an orpanie.Wd'1NtA orp�nk 1k�"b pra+P p�v+1.Wd"pnwly•b qroup ryrM. <br /> S�nda with S b t2%Iinu nquin dwl�Y��� nart». ~PI,ZI�nd plols o�a�bow••A••Nn�. <br /> SWSM vv�l4yradeC tand with silt �tl wN conta1ro215%prtvN��dd"WM pr�vN"Oo proup �PI<4 a pbts Dslow••A�•lin�. <br /> SWSC wNlynO�d s�nd with WY nurn. PPI plots on a atwN••A••Gn�. <br /> SP-SM p0prly qradsd s�nd wiM�NI O <br /> SF-SC poory phded und wiM cl�y p�P�a�p�,••A••Yrr. <br /> " SIEVE ANALY515 � <br /> ' Fo�clossitieotion of fine- roined sails <br /> I sc�ccw-�� � sievc wo. ( on me-aro�ne rac �ono coaru-9ro� �/ <br />. roo� t�.�k k � w :o .o so �.o xo�o foi t. <br /> � H 30 <br />_ � d EQuotion ot�A-IiM `�� <br /> I , X Nori:ontol at PI-�to Ll-25.5. t <br /> � w :o W a � then PI�0.73(LL-20) ''Ww � .�Pv� <br /> = z 2 Epuotioe of�U�-lin� <br /> y I �«���^�� a — Vertitol ot lL�16 to PI=7 / <br /> d t0 � : I 'O �. � � then PI■0.9 fll-8) �/ G� <br /> v <br /> W '� I � 6O = ►- � ` _ . <br /> . Q �Os�l.Smn� � V y �� V <br /> W � i ¢ < 20 <br />—! a :o , eo a d � 8 MH � Of"� <br /> I � � o.-o.o,e �' (J� <br /> � 10 <br /> ° '°° ML OL <br /> �.,__ �. �. �. � � - , on <br /> !0 10 9 �.o O.] 0.�0 4 <br /> ..� PARTICLE SIZE IN MILLIMETER$ � I <br /> 0 10 16 20 30 �O SO 60 70 80 90 100 Ii0 <br /> � �•'�-003'=0° <<' o,�.�.."a.-d�3's� 110UID LIMIT (LLl • <br /> (� tllJlfl CICV CQSCIf'7q <br />- sE-, (se•o) <br /> � 7 coraoraoan <br />