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<br />I AMERICAN ASSOCIATION OF STATE HIGHWAY OFFICIALS
<br /> SOILS CLASSIFICATION SYSTEM
<br /> C1QuifjeatiDn of Soih. and SQiJ~Aggr.9at. Midulttl
<br /> G.noeral Cla...inca,ion Granular Ma'.riGh Slh-Clay Mal.rial,
<br /> (:15% Dl l.u pou.ing No. :2001 (Mo" then ".,. pa...ing Noll. '200)
<br /> '-1 .., '-7
<br /> Graup Couifkaliorl .... .... ... A-7.s.
<br /> A.l-a 1..1.1:1 .-3 ....24 "'-'J~S A.2..Q .&.-1.7 J..7~
<br />I S;__. Analysil, PiHC.",' pclMing:
<br /> No, to (2.00 mml ....._................_.. SO melL .... .... .... .... .... .... .... '""
<br /> No. 40 (0."'25 mm) ...._....... ........._.. :30 mClx. 50 mall:, :51 min.
<br /> No. 200 (0.07:5 mm) ......... _......,....... t5m~. '2:Smoll.. JO 1?\4,1;. 35 malt. 35_,,- 35 mall. 35 malt., 36 mi~.~ 36 min. 36 min. 36 min.
<br /> Characl.rillKJ. of Fraction pguing No.o40(0.425mm)
<br /> Liquid lifnit . ,......... _.. ............, ,.,.. ",Omax. 41 min. 40 mGla. 41 min. ..0 ma.. 041 min. <4.0"'011;, 41 min.
<br />I PIQUi~ty ind.x .. ........... _............... 6. InGlt. N.I'. 10 moll:.- 10 mGx. Ilmin. 11 min. IO~ 10 mGx. 11 min.. II min.
<br /> U.IIIGI Typ-. af Si9niji(0~r Consiill,lDllt MaI.rillll.1 ~~ r-rogmDnl~ fino Silty Ot Cay..., GravDI and Sane! Silty S<Jii. Oay..,.. Soil.
<br /> ra and Son Stmd
<br /> G.n.rcll Roting a. Sl,IboJrao. ................... exCDIIDnt fo Gcooci I Failla Poor
<br />I Th. plGcinoJ of A-:J be4a... 4-2 i. _UGty in lhe "l.h ,. rivhl .linUftClti_ pr_.... ond do.. not itld4cot. ",poriority .f A-3 _ A.1..
<br /> piQ"icity inclex of ",.7.,5 wbgroup i. .q1lOi to or Iou Ihlan U. minl,l. 3D. !'ia.'icity indo.. .f J..7-6 subg!raup is g,_I., 'non u. minuJ 30
<br />I PLASTICITY INDEX Pl
<br /> 0 10 20 30 40 SO 60 70 GROUP INDEX CHART T1ST
<br /> 100 SOT G,O"!, Index (GI) z (f..J5) [0.2.0.005 (U-40)] +0.01 (F.15)
<br /> / {PI.} 0) wh.... F I % Paning No. :200 .i......, U : Liquid 120 ~
<br /> T Limit. and PI & Pla:5ftcity Index.
<br />I 90 I I !.,y T Wh.n W'orlting will, A.2..o and A.7.-7 'Iubgroup. + <(
<br /> T + ."
<br /> the Portial G,OYp loan (PGI) i$ determined f,om the }o~
<br /> l #~ T Plonly.
<br /> 80 r
<br />I .y When the combined Partial Group Indica. are
<br /> SUb..a. 40+ negQti~.. tho Group Index should be roported Q~ ZOlO. + <(
<br /> 70 '. I I -=-35-L.
<br /> ... 4...> "'.b
<br /> :E I .,.
<br /> I -J" T ~O
<br />'- =60 1,/ I I t
<br /> 0 I
<br /> 5
<br /> Q so A-S A-7 X I .
<br /> ~ /1 I I ~ Jot :t 1U
<br />I .::.so >
<br /> iT ~" .j. !!!
<br /> 40 + '"
<br /> I I I ~ .,. 0
<br /> ::l T ~'\" +-
<br /> 0 T 0
<br /> ... f N
<br />I JO 14.-4_14.-6 '" T ~ "
<br /> I I I " T ~ ~ +60 0
<br /> ~ T ~ z
<br /> <( 20 t I
<br /> 10 ;:: ~ ~() C) c:J
<br /> I I '" .q, .....'Iii , ~
<br />I <( T ~ .,. '"
<br /> ... V L70 '"
<br /> 10 t -.cf',::,~ <(
<br /> LiqUid Limit and Plasticity Index Ranges for the .,. ...
<br /> .l 0: :t ...
<br /> A-l. A-5, A.. and A-7 Subgroups ~~ ~ .j. z
<br /> t '\" - w
<br />I :r u
<br /> + ~'" r '"
<br /> w
<br /> ~'" -'-80 ...
<br /> Definitions of Gravel. Sand. and 10 T :t
<br /> T .'" .1
<br />I Sill-Clay
<br /> The terms "gravel. to .. coarse sand," T ..~ +
<br /> T 190
<br /> "rine sand," and "silt-clay." as deter. ~ ....'0
<br /> min.able from the minimum test data re- I *
<br /> quired in this classification arrangement }".... .,.
<br />I and as used in subsequent word descrip- +-
<br /> +
<br /> lions, are defined as follows: ..'" 1,00
<br /> CRAVEL-~latt'rial 'pa.lOS:f ~ieve with ,3.in. 0-
<br /> square o~mngs :.md ret.ain on I11e Nu. 10 Sl~"'e. ~
<br />I COARSE SAND-Matt'rt:li po.luing the No. 1D
<br /> ~ll~....e and ret.;;uned on the No. -10 sieve.
<br /> FINE SAND-Material j)duing the No. ..0 sie....e t
<br /> ana. rel<nnea an U'I1l:! No. 100 slevt'.
<br /> COMBINED SILT AND CLAY -Molle ria! pa.ss.ing camale: ~
<br />t' U'lcNo.100 SIll"Ve. 82% Paning No. 200 si.vtll PGI. 8.9 for LL
<br /> BOULDERS iret.1inedon J.in. si~veJ shQuldbe T LL: 38 PGI - 7.4 for PI
<br /> ~Jl.c1l,1dt!'d from th~ pO("Uon 01 Lhe 5;;Jmple to wl"llcn " ~ PI_ 21
<br /> the dOlSliICicallon i:;: OlppUed. but the ~rcenL:l.le of GI- 16
<br /> SLldl matenul. it an)". In Ute s.ampl~ should be
<br /> C"I:(."Ord~.
<br /> The term ',.SillY" is .::lI1Pli<<t to fine mmerial havinlf
<br />I plasuC:,ilY mdex olWuf" t_~..ru1 the lefID Ucmyey
<br /> IS ..ppileO. w fine mouen..l h.:.L~lng pl.::lSllClt)' lnGl:x
<br /> 01 tJ IJr gn!~l.t!r.
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