CCP 11-12-1996 - Laserfiche WebLink

Home Browse Search

I CLASSIFICATION OF SOILS FOR ENGINEERING PURPOSES AlY1ERICAl'l" ENGINEERING ASTM Designation: D 2487 TESTING, JNC. (Based on Unified Soil Classification System) Soil ClassificaUon Criteria for Assigning Group Symbols and Group Names Using Laborarory T est~ Group Group Name3 Symbol Coarse-Gtained Soils Gravels Clean Gravels Cu~4 and 1:sCc.s3-= GW Well graded gravel'" More than 50% (glamed on More than 50% coarse Less lhan 5% rinese No. 200 sieve fraction retained on Cu<4 and/or 1:>Cc:>3c GP Poorly graded gravel"" No.4 sieve I Gravels with Fines Fines classify as ML or MH GM Silty graveIF.a,H More than 12% linase Fines classify as CL or CH GC Clayey graveIF.a.H I Sands Clean Sands C~ and 1~ Cc~3c SW Well-graded sand' 50% or more of coarse Less than 5% finesJ fraction passes No. Cu<6 and/or 1:>Cc>3e SP Poorly graded sandi 4 sieve Sands with Fines Fines C!assiiy as ML or MH SM Slit'( sandG.H.1 I More than 12% fineS' Fines Classify as CL or CH SC Clayey sandG,H.1 Fine-Grained Soils Silts and Clays inorganic PI:>? ana plots on or acove CL Lean clay'<.LM I 50% or more passes the Liquid limit less than 50 "A" linli No. 200 sieve P1 <4 or plots below "A" ML SilrL.J.I lin~ I organic UQuid limit. oven dried <0.75 OL Organic clay'{.L.M.N Liquid limit - not dried Organic sij~.1..M.O I Silts and Clays inorganIC PI plots on or above "A" line CH Fat clay'<.1..:" Liquid limit 50 or more PI plots below HA" line MH Elastic silrLM Ie organic UQuid limit: - oven dried <0.75 OH Organic clayl".LII.P liquid limit. not dried Organic silr"-Lw.o Highly organic soils Primatity organic matter. datI< in color. and organic odor PT Peat I ""'8ased on the maleriai OaMin9 the .3-in. (75-mml sieve. =Cu .. o~ IDro (D~2 ..I1f Anernerg limrts olot in I'Ialcned area. SOil is a CL.ML au field sample contained cobbles or boulders, Of com. add "". silty clay. 0/0 ct DSO /I'll :soil conlains 15 to 29% P'\,IS No. 200. add "with sana" I '''with cal:lble$ or ooulders. or wen" to grO\lp name. Cafavels with 5 10 12% fin~ r.,.uire dual syml:lOls: ....11 soil contains.:::;'5% sand. add "with sana" :0 groUQ ar ..'....itl'l gtave$." wn~eyltr is predominant, GW-GM well-grsded grave4 "",ith silt ,1ame. ~t scil ccnlains2::!O% plus no. 200. oredommanllv sand. GW~C weJl-graded gravet WItt! clay Gtf ~ines classify as CL.ML usa dual symoal GC-GM. or acd "sanely" to 10 grl:ruO r.sme. GP-GM poorly graded gravet witn silt SC.oSM. Mil sed contalns~O% pluS No. 200. predominantly I GP-GC .coorty graded gravel wirt'I clay ~r fines ate organic, add '"wilh Of'qiInic nn<<S" to grouo grave', aC<l "gravelly" to grouo nam&. OSanas with .s !o 1:2% fines reQuire dua! symOQls: f\.8me. Hpl~4 an4 .clot!! on or aboVe ,.""u line. SW..sM well-graded !a1'lCl with silt 111 .so.l' contail1$2:15% gravlll, add: "'Il'itn graver' to grouo OPIC4 or p!olS C910W "A." line. SW..sC weU"9raded sand with day name. PPl plots on or aoove "A" line. I SP-$M poorly graded sana with Slit lJp1 plots below "A" line. SP-SC poorly graded sand witn clay SIEVE ANAL"l'SIS '" I 3CRE:EIoI ~ IN I SIEVE 1010. I Fot" clossification of fine-<2rllinecl SOils - ,. ~o .0(1 50 '''0200 ~nd trne-qn:nned T1"ll(:Tlon OT ~OC,.<;e-1nlrned I I I I I 1 I 0 SOils. I H '0 I I I I I I i .. E~uoTlon ot "AO -linil! ,," I I I i I 000 x HorIZonTal OT P!-4 to LL-2.5.5. I :; I ~ "' thl!fl PI-O.73 (LL-201 z ~ i I I I ;; " '" EqlJ<l1'ion ot"U"-line ~ 0..-15"'111 Z ., i il I 1 I 1 .,~ - Ver1ical at LL "'16 to PI=? I , I ~ ~ , I 1 = ,.. then P!"0.9H.1.-3l ~ I i I I I I I i i .... % -. ~ - '0 I I I .. z u ~ I II I 10....u~rn I I w <0 <0 ;: = ~ i I I I I i I ~ '" ~" , ., '0 IMH OR OH ..~ ..J ir Ii I I o,~ ~Q.OTS 0- f' " i I I I iJ,oo I I 10 .. iO , 1.0 J.~ :;1.10 7 - /; '-MI: i I .:)ARTICLE. SIZE IN MII.L.JMETE.~S . - I c...~"ds-aoo Co:.. (0...11 .. !~.lll ..." 00 10 1620 90 100 110 I iJ...lil..~' L.IQUlO