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<br />TABLE I(c)
<br />5UMMARJ OF LAB<IlATORY EVALlJA'rIClNS OF COLCl'tAOO CLAYS GIVING FAVORABIB RESIJI4'8
<br />
<br /> Colloid8J. ""it F1l.ter lA,<< M1:mbill ty SwU Cation Imlb.MgelUll.e
<br /> Tested ""'_.
<br />...". Jl"1IllII! and Location ,. Yield Content ..~. ..~. In". ,.... Cai8City Sod1~ X-Ray D1ttract1on ADal.y-.es
<br />Bo. 1961 ~ ~ mJ./IlI1n. rtJd&'E ~ ~ _gfl.oo g. Percentll&l!
<br /> South Pl.attt River Drainage Baain
<br />537-5 Marshall. Lake 50.0 I.. .,., 0."" 68.7 50 ,~.O ',1 M1md ).ay'trll1Cntlllorlll.on1te,
<br /> Jr of Golden quartz, illite, kaollnite
<br />867-2 Bennett ,.., 0.' 6.. 0."" l.6.8 40 12.' ,.0 About l./2 quartz, clay mainly
<br /> 11 or Golden kaolinite
<br />868-1 Lindsey ".4 ,.. ,., 0.006 66.7 ,0 12.' 1., Mostly quartz, halance kaolinite
<br /> R of Gol.lien end illite
<br />862-1 WiBeohunt 52.4 2.1 U.2 0.004 12,6 40 19.9 ',7 Kaolinite, qu.ertt. illite in
<br /> Rear Castl.e Rock appr'ood.llIll.tely eq\laJ. amountll
<br />-2 4,.1 ,., ..9 0."" 10.9 20 9., 2.6 Moetly quartz, kaolinite only other
<br /> caatitUllnt
<br />83l.-l. W,blo 57.7 I.. ..6 0.002 '2.8 108 ,o.l. 1.0 MocItly quartz, ililte. kaolln1te,
<br /> JI" of Wellington .aIIe Fel.dapar
<br />833-l. _00 "., ',1 l.89.0 0.009 82.7 '" 18.3 1.0 Montmorillonite vjka.ollnite,
<br /> R of Ft. Collins gypBu:m, pl..lla1oclue, calcite
<br />-, " 78.2 2.0 0.9 o.elO1 47.l. '" 18., 2.1 81.m1l.ar to 8"-l., perhaJIIIIllOl"e
<br /> .".~
<br />852-l. Warren 6l..0 '.7 78.0 0."'" 82.9 60 49.5 Q.9 MoIItlylllODtmoriUon1te, cOlldd.er-
<br /> B of Ft. Collins eble quartz, vjFel.dJJpe.r
<br />s,8_l. B""oo 64.1 0.6 l.7.8 0.001 43.8 70
<br /> Jl"WofFt.Coll1nll
<br />-2 56.5 1.6 1M 0."" 86.1 UO
<br />S83-l. Roberts . 23.' 23.' ,.. 0.001 46., "
<br /> Ft. Collinll (t)
<br />-2 . 22.7 21.9 ,.. 0.0006 69.9 25
<br />563-2 Cl1no . 56.0 0.9 6., 0.004 61.4 60
<br /> Bear Kiowa (t)
<br />-, . 56.Ii 0.' '.9 0.0009 l.0.2 120
<br />536-2 Schra4er 43.7 2.6 13.3 0.004 99.1 UO
<br /> II of Ft. Morgan Moatl~ IllOIltmor1l1onite, lljquart.Z
<br />-, " 52., >-7 26.7 0.004 1j.7.0 1}2 7'1.2 ,.,
<br />-, " 57.6 ,., 48.7 0.0009 n' 99 50.6 6., Quartz, IllOIltlPOrillon1te, illite,
<br /> lljg;ypau:m. Fel.dapar
<br />86,-l. Le.stChal1ce 4l..9 >-7 12.1 0.004 24., ,. 2'1.2 '., Quartz, lljlDOlltmorillonite, illite,
<br /> S\I of Akron Fel.caper, gypa\llll
<br /> Borth Platte RiTer Dra1naae Buin
<br />",<>_1 Colter x 56.7 '.7 6.2 O.W; ~.J,..7 290
<br /> E of Walden
<br />-2 x 72.2 1.0 '.0 0.0004 l.6.6 "0
<br />-, " x 59.' '.7 ,.6 0.0 12.7 420
<br />-, . 6,.8 6.1 1.0.7 0.0006 l.1.9 180
<br />-, " x 69.6 2.0 '.1 0.002 10.0 '00 87.0 3~.6 .
<br />_6 " x 65., 2.1 2.7 0.0 6., ,60
<br />-7 " x 54.2 0.9 1.0 0.0 '., "'"
<br /> CallIllercial Bentan1 te
<br />500-1 AD:r1ca.n Colln1d 58.6 ,.. 35.9 0.01 -- uo 67.4 65., .
<br /> M1118iuipp1
<br />500-6 Benton Clay 70.3 1.6 0.. 0.0 -- 22' 61.9 .... .
<br /> ..,..,....
<br />500-5 ~~...~laBent. 81.8 2,. 0.. 0.1 -- 6,,, -- --
<br />
<br />C(lIIIp11t'd'b)' G. A. Lutz Nld L. G. \oIh1te
<br />
<br />OurLIJIK OF LABORATORf DlTIBC mOCEOOl\B.
<br />
<br />*'!'e.tiDC ~ but. not ccapleted
<br />
<br />~ PretJll.r&tion--Upon being reCleived in the laboratory, each IIIIIIIple 18
<br />assigned a lab nUllll:>er, a1r.dried, and crushed to 3j4~inClb. or leBB dze. A
<br />representative test portion is erushed to palls a U.S. Ro. 8 deVil (O.l-ineh
<br />openings) and is oven-dried at lOOoC. Most of the follOW1Il8 tests are per-
<br />f'or1ll<!d on this slll!lPle.
<br />Conoidal Y1eld__'l'h1s is tho: percentage (by wight) of sll.lllple tb..at ill
<br />extremely fine-grained or of colloidal elay size (no gr1ttinesll vhen tallted).
<br />It is determined by dillpersing or 1lI1x11l8 thoroughly 20 f!PJ (0.7 oz.) of test
<br />sample \11th 1.5 gma of d.1sperslll.t!.t (eod1U1l\ tripolyJihospbatll or calgon) in 1000
<br />cc (1..06 qts) ot distilled wate:r. After 'being thor~ di.persed, the mix-
<br />ture is allOllllld to set und.1st=bed tor 24 hourll. At the end of the settllll8
<br />period, the cloudy m.1xture rellla1ning, is s\dlllllllld off and wasted a.nd the 1led1-
<br />JDent at the bottlD of the .Jar is dried a.nd weighed. The col.10idal yield is
<br />obtll1ned 'b)' difference ami eXpreBBed all a percentqe or the total weight of
<br />te8t~e.
<br />Grit ContentnTh1s is the pe:rcentll.fl;e ('b)' weight) of NlIIp1e that is of sand
<br />or l.arge~ The sample is prepared &8 for the CloUo1dal yiel.d teat, bat
<br />the cl.ay_d1speraant.water IIi.1xt\ll'e is run through a U.S. Ro. 200 llieva (0pen-
<br />ings .074 IllIlI or .~ in.) in place of the 24-hour .ettling procedure. The
<br />grit content is the perClentae;e (bl weight) of the tot.a.l ll.lIIIIple that 11 reta1n~
<br />ed on the U.S. Ro. 200 sieve (wet).
<br />
<br />M1xabill'l;y Index-.Th111 tellt Sivea a relative idea of ho.r e&8ily the III1111pl.e
<br />clay- Cla.n tM! dillperlled or mixed with water. It 18 obtained 'b)' sllb.Jecting &
<br />20 gm. slllllpJ.", of .electively sieved material (paasill8 U.S. Ro. 4 a.nd retained
<br />on U.S. Ro. 8 sieve) to & st.a.nda.rd vuhing test. The result i.ll expressed as
<br />a percentage of the original sample ~OII't .in 8 30 .ecoM lIBahing period.
<br />!MIll IDdex._Th1.11 tllllt determines the 8IIlOWIt of _U that the slllllple \/ill
<br />exh1""'bI'tlltlen wetted. It i. perf<Xrllled on a selectively sClreened _tenal (pas-
<br />aing the U.S. xo. 30 ll.illVll and reta1ned OIl the U.S. Xo. 50 lIieve). It Cl<::apareS
<br />the 'rll!lt volUlll8 of lIample to the dry volllllllt.
<br />Cation Exchanll:e ~--'1'h1. te.t lIlBUurell. the ch91eal activ1 ty of the
<br />.8IIlple. It is 8 s~oilll tut. The results are expre:ssed in 1lI1ll1equiv-
<br />alent. per 100 plII or ll.lIIlIple. Th1, testing and that for the :follOll1ng teet
<br />(ExClbaD&al&ble Sod1U11l Percentae;e) YU performed by the ceu Aar=OIll1 DepartJlll!nt
<br />(Soia).
<br />!xc~l.e Sod1\1l1 PerClen~-~'l'h1' test determines the percenUlge ~ 110-
<br />diu:m invo:'le in""lli8"totaJ. ell. on lIxchazl8s capacity prev10ualy dellcribed.
<br />X-R..,. D1f1'rac:tion..Th1ll. m.1.neralCCicaJ. determination on ll.CIII! or the slllllples
<br />vas c(llljp1eted by thll CSU GooloSr Department.
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