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GRADATION DESCRIPTION EXAMPLES ` Welt-graded Full range and even distribution of grain sizes present Silty,sandy GRAVEL POedy-gmded Narrow range of grain sizes present Fine to medium SAND,trace of sift Uniformly-graded Consists predominantly of one grain size Fine SAND FIELD R E F E REN C E Gap-graded Within the range of grain sizes present,one or more Sifty,medium to coarse SAND SOIL C LAS SIF I CATION sizes are missing r Dual Symbots (symbols separated by a hyphen,i.e., VISIBLE i NON-VISIBLE NATURE OF ICE CLASSlFlCATION SP�M,sightly s fine SAND)gh y silty )are used Friable,poorly-bonded material is easily broken up Nf for soils with between 5%and 12%fines Segregated Ice is or when the liquid limit.and plasticity Not Visible by Eye Well-bonded,soil particles strongfy Excess ice Nbe index values plot in.the CL-ML area of held together by ice No excess ice Nbn the plasticity chart Individual ice crystals(record size) Vx Bordedine Symbols Ice coatings on soil padides Vc (symbols separated.by a slash,i.e., Stratified or distinctly oriented ice formations CAL,silty CLAY/clayey SILT;GW/SW, Segregated Ice is (determine thickness and orientation) Vs sandy GRAVEL/gravelly SAND)indicate Visible b Eye that the soil may fad into one of two � y y .Random or irregularly oriented ice formations (determine size and shape) Vr possible basic groups. o - r . A :$ . ' 1 ;. GRAIN SHAPE Nw y 'e8 ElfariiCt 1Ut' litc.` +� '• ` Tl u .t' il SC� E3� ntt3 Me m � ��o b"4 irk' hard 'am.s�td mar - c siE s or:. l� fed des. pe. Angular Srde Pur los The .8p rr �• bra� and 't. pre � �:�bc: . ras e. # _�_ l�auc:sroa arww s� f .- `lam - on e:ft�b aid a aid s€crface. TA -ParUc*%StW . -uban for TAS N- _. sha 'Rbf late pe s� des�r wt x; Tim -� wad sft� et a:.pares J t se t# Pam WM- dtfr Surrounded - _ � P �kkV wd-do s no disc .or dhi s 8�.�$ g. fed Pa nth. sl : r3 yy rya Fl ld t {� Pia, €wt��a f both Oat arf � "s� E aled a a ABLE�# lierl�for De�E�lbin�the�eae n��r� ''Rounded TASK 4 Cd . Y i Tni e v w::.......J i. None ream 1: y50t '+a't5 r €fad to r . L:L)1M rip .t�dC. Some t. :I ; ar rit ea , l SPT SPECS P€ o 1=rarn ASTM.D 1586-84 -� rid bread { CD fa 0�. T # a a a s TA C`ltb#tom �s< 140-f b hammer, -inch freefaf! P.M$"is! q tired to r the r 30 -u gh �°fly pum ft . T ftw and. Cathead: 6#0 10-inch diameter, 0 G�ems'I"brealas h h . h :' Weak . 2-1/4 rope turns, '` �# t ' er P : lod `t 0 - brt+ coa f '100 rf'rn, � mechanical OK V A'1 - ampler_ 244nch long, figtat .. or weak Pr r€rb . :th!`ead caanO be royal at:any Wa . &IL. shoe ID=1.375 inches, TABLE' t trey QIrwt . te barrel ID=1.5 inches, 'fhe aad caa t `ely ba►.rid i At*kmv Ltt Iori bier than the plastic � lt 'I a OD=2.0 inches - Tl - ., each of �- 'ead��:.�r - - �!'fit l�.b � _ ed:. r _. four fi4n h. - - for €� ea3 the. ...:. c increments F Tha thread ML None Slow to Low:or Thread Mid b (er€'slled a td Love Rapid Cannot:be Fom�e f Refusal: 100 blows for 6 inches T h�cutres*tom d ifn or Medium less,75 blows for<1 inches ptie _ CL None to �< to:High Slow !Medium . . I okes cCo KWable tirna roar knead Standard Resistance L r sit Tl th€` My ow to None to l ow..to n p. : Penetration m - h rerod sev+t-al fines after reaches the plastic Mediu Slow Medium - a ba f :. . High to =blows for middle 12 inches _- W�drier the plastic li€n€t_ CH Vey Huh None High