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ALLIED TEST DRILLING COMPANY <br /> � SOIL CLASSIFICATIONS SYSTEMS <br /> . <br /> Unified Soil Classification <br /> ASTM: D 2488 - 84 <br /> Group <br /> Major Divisions ��� Typical Grcxip Names <br /> COARSE- GRAVEI.S Ckan GnveL (iW Well�radod gravcla,Wcll �radod�ravel with sand'. <br /> GRAWED SOIIS <S76 Passu►Y <br /> More than 5096 No. 200 aieve GP Aoorly-graded gravd, Poorly�ndod�ravel wrth sand'. <br /> More than SO�e of ooarse <br /> natained oa tbe 5�ction retained �vd w!5oes �M Sihy �avd,Sihy �ravcl with �u►d'. <br /> No. 200 sieve. oo No. 4 sieve. >1396 pwing <br /> pa, Zpp��r� GC C4yey gnvel, Chycy�tavel with sand'. <br /> SANDS C1an Sands SW Well �radod sand,Wcll gradod tand widh gnvel. <br /> <S!6 pas:ing — <br /> 5096 or more of No. 200�ieve SP Poorly graded und, Poorly gndod sand with gravol. <br /> coarsc [radion <br /> passu No. 4 �s� �a SM Sitty sand,Sihy :and with�tavel. <br /> sicvc. >15 �+ passing <br /> No. 200 aieve SC Clayey sand, C1�ycy sand with gravel. <br /> FIIdE-GRAINED SII.TS AND CLAYS ML Silt, Silt with unA�, Sandy Wt"'. <br /> �� CL l.un cL Lean cL with sand�, Sandy kan chy�. <br /> Liquid Limit iess t1►an S0. y� y <br /> Cohesive wils <br /> OL Otganic iih, Organic cley. <br /> 509f� or morc SII.TS AND CLAYS MH Elastic sitt, Elastic �i1t with sand�, Sandy cLstic�ilt"�. <br /> pasees the No. <br /> 2(!0 sieve. Liquid Limit more than SO CH Fat c4y, Fat cLy wnth undN. <br /> OH Organic clay, Organic silt. <br /> HIGHLY ORGANIC SOILS PT P�eat• <br /> Boundiry eLasiScations are designatod by dual group rrnboL. Por axampk(SP�C), Aoody gradod�ar►d with e4y. <br /> • -More thaa 1596 aand, �� - More than 1576 saad. <br /> /�- 15l6 w 309E rotained on No 200 Sieve, �#�-More tban 30� retained on No 200�icve . <br /> AASHTO Soil Classification System <br /> c�u�M�� suc-cVy M.c�� <br /> (3576 or ksa passing No. 200 tieve) ( >3596 pasaing No 200) <br /> A-1 A-3 A-2 A-4 A-S A� A-7 A-8 <br /> A-1-a A-1-b A-2� A-2-S A-2-6 A-2-7 <br /> ieve Analysis: <br /> Pasting <br /> No. 10 30 max <br /> No. 40 30 mu SO mu S1 min <br /> No. 200 1S max 25 mu 10 mu 3Smu 3Smu 35mu 3Smu 36min 36min 36min 36min <br /> ractuistics of <br /> raction Passin�No 40: <br /> �u� � �Oina�c ♦1 min 40inax 41 mu 40cruz 41 min 40max 41 mu <br /> plastic limit 6 muc NP lOmaa lOcnax llmin llmin lOmax IOmaz l lmin Ilmin <br /> �ual Typu of �tone fngments fine Pa�, h►Bh�Y <br /> ignificant Constilucr►ts �ravcl and und atnd •ihy or c4ycy gravcl and �and silty �oils clsycy soils organic :oils <br /> eral Subgndc <br /> WQ ea�oeUcnt to good fair W poor unutisfactory <br />