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<br />
<br />TABLE I: SUMMARY OF TEST RESULTS (PART I)
<br />FROM INITIAL LABORATORY EVALUATIONS OF COLORADO CLAY SAMPLES
<br />
<br />Sample F11t;~~~:Jellt FilterCak.. S"..11 Ind!ex (;;\
<br /> NamellIld Collo1dalYield Grit Content Stabllit MiJ<ab1.lit Index
<br />". Location ~~~ ~~{ 06~~ ~~~ 10_~>i lJn~~r o~~r Over
<br /> 0-10 lO.~O Poor Fair Good O~25 25-50 50-75 75-100 0_50 50-100 100~150 '50
<br />828-1 Fox_Dilley__ 39.5 8.8 ,.' , 77.5 9"7.8
<br /> N. of Canon City
<br />528-2 Fox_Dil1ey__ 39.6 7-9 '.8 , 3~.9 88.0
<br /> N. of Canon City
<br />831-1 wyble__ 57,7 '.8 8.6 , 32,6 108.0
<br /> N. of',;ellington
<br />S31A~3 'wybleu 36.2 '.0 ,., , 32,5 78,0
<br /> NearCreede
<br />533-1 Manroan 73., ,.' 189.0 , eo.7 143.0
<br /> N.ofFt,Collins
<br />533-2 Monroeu 78,2 '.0 ,.9 , 47.1 162,8
<br /> N,ofFt.Collins
<br />$36-4 s"hraderu 52.' L7 26,7 , 47.0 132.0
<br />5}6-5 N.ofFt,MorgWl
<br />Schrader-- 57.6 ,., 44.} , 77.9 99.0
<br /> N.ofFt.Morgan ",.s'
<br />537-2 Stralnland-- 56.2 15-5 , "'., 30,0
<br />s37-5 N. of Golden 41.4
<br />Marshall.. 50.0 L8 23.7 , 68.7 50.0
<br /> N,ofG<llden
<br />S112_1 Rump-- 47.2 ,.' L5 , 14.7 170.5
<br /> Cd of Grand Junction
<br />543-1 Burton_Tuttle__ 36.0 7.0 1"7.1 , 46.9 55.0
<br /> W. of Aspen
<br />51.4_1+ tlutterfie1d__ 66.1 LB L2 , e., 25,,0
<br /> 8. of Lao Animas
<br />84,_1 \"agner-- ,5'.6 7.9 10.3 , 38.2 130.0
<br /> Near Las Animas ",.f
<br />847-1 Mossn 24.3 40.' , 78.0 25.0
<br /> NearWestcliffe 3,.8
<br />848-1 Mumrna~- 30.6 lLl 2,41 '., , "'.7 110,0
<br /> ;./. of Salida
<br />849-, Lamberg-- 35.6 6.7 '.6 , 77.7 90.0
<br /> 8E of Salida
<br />852-1 ;,larreD__ 67,7 ,.7 172,0 , 36.4 60.0
<br /> ,. of Ft. Collins
<br />852-18 ',larreD__ ,6.8 ,., 162.2 , 98.9 75,0
<br /> 11. of pt, ColliD"
<br />553-1 'Jhlte Bosen 47,5 0.' 129" , ,0.0 30.0
<br /> Near Carr
<br />854-1 Brick Plant-- 35.5 0.8 4,,9 , 21.4 30.0
<br /> g,ofFt.Collins
<br />555.1 Clover Basin__ ".9 0.8 52.0 , 19.4 46.0
<br /> SHofLongmont
<br />856-1 Cox__ 26.4 ,., 31.7 , 1~.2 10,0
<br /> NE of MorricOIl
<br />860-1, '"c1te-- 37 ,~ ,., 97.0 , 62,1 30.0
<br /> N. of Colorado Springs
<br />S62-1 \Iisenhunt-- 52.4 ,., 12.~ , ",.6 40.0
<br /> NearCa"tleRock
<br />862-2 Wise"hunt-- 43.1 ,.' 10,1, , 10.9 20.0
<br /> Ne..r Castle Rock
<br />S6,_1 Last Chance-- 41.9 '-7 19.7 , 24,3 57.8
<br /> ::;1-/ of Akron
<br />864-1 Harvey-- 44.4 18.8 304,0 , ,8.1 40,0
<br /> 1-/. of Canon City
<br />867-2 Be"nett__ 49.5 0.' ;.8 , 16.8 )J().O
<br /> N. of Golden
<br />868-1 Lindsey-- 33.4 ,.8 s.7 , 66.7 30.0
<br /> N.ofGo1den
<br />S71-1 lIighway 63~- 34.3 16.4 42,5 , " 7 25.0
<br /> N, of Akron
<br />S72-1 PeachV..11ey__ 60.8 7., 15,1 , 46.1 '"
<br /> E. of Delta
<br />873-2 Mahan__ 31.7 ,., 32,5 , eo.' 50.0
<br /> Ne..r(?)Pueblo
<br />574-1 Schrader-- 36.2 L' 112.~ , 32,7 70.0
<br />=" II. of Ft. Morgan
<br />,",,-' Ilyomingbentonite 86.8 ,.8 0.9 , ''7
<br />
<br />\iithextralm.shing
<br />
<br />Compiled by R, 1-/, Hansen and C, C, Smith
<br />
<br />Supp1ementalProcedureNotes
<br />
<br />SatnQ1e Pret>aratlo"-~All s""'pIes !U"e :registered for identification,
<br />OVe,,"d1"ied ..t lOOoC, and " test portion crushed to pass a U.S. No.8
<br />sieve.
<br />ColJ-oidal Yield--is the percent of sllJ:lple that vill remain sus-
<br />pended or dispersed in Im.ter after;:4 hours. A high yield normally
<br />means a high clay content, and usually a high sealing potential,
<br />Grit Co"tent__is the percent ~ sample left 0" a U.S. No, 200 seive
<br />aft;;:-iiashing. A 10" percentage of grit is deSired f'or most sealing
<br />applic..tionS.
<br />Filter Lossnis the 10$s* Inml./minwhen400llll. of..z1,mixture
<br />of bentOnite1n water is placed in n. pressure cell, SUbjected to an
<br />air pressure (e'lUlll to }4' of water), and filtered through Il. standard
<br />filter paper. A 10\0' rate of' loss is desired.
<br />
<br />f'il~~;t:~r=~~i~i;~~ ~;~l~:~tb~oB~b~:i~~e~h~/~e~~t~B l~~~e': a~he
<br />approximate idea of the-r;;&TstiiiiCe to erosion of the clay sediment,
<br />M1xabilitY~__lsobtainedbydind1ngthewe1ghtofsamp1elost(after
<br />a ste.ndard Im.shing test) by the original veight. A high index inMcat"s easy
<br />mixing,
<br />S\lell Index--is obtained by measuring the l"crease in volume vhen a dry
<br />sample of-knovn bulk volUllll! is saturated or completely ""tted, Some swell is
<br />desirable but not too much,
<br />*For CompariSOll note that a:
<br />1/8-inch layer of -40 Qttava sand had a seepage rate equal to 1440 ml./min
<br />1/8.inch layer of local sandy soil had a seepage rate equal to lOO} rnJ.,/min
<br />Filter paper alo"e had a seepage rate equal to 651 ml./mi"
<br />
<br />-3-
<br />
<br />1025
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