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DISCUSSION EXP 8

In this 8th experiment of CE152P entitled Unit Weih of!re"tes# fo$%ses in determinin the %nit &eiht of Co"rse "nd 'ine"re"tes( !re"tes "re )"si$"ll* " m"teri"l or str%$t%re formed

from " loosel* $omp"$ted m"ss of fr"ments or p"rti$les( Unit &eihtis "lso $"lled "s )%l+ densit*, %nit &eiht is "n indi$"tor of soil$omp"$tion( It is $"l$%l"ted "s the dr* &eiht of soil di-ided )* its-ol%me( .his -ol%me in$l%des the -ol%me of soil p"rti$les "nd the-ol%me of pores "mon soil p"rti$les(

.his test method is often %sed to determine )%l+ densit* -"l%esth"t "re ne$ess"r* for %se for m"n* methods of sele$tin proportionsfor $on$rete mixt%res( .he )%l+ densit* "lso m"* )e %sed fordeterminin m"ss/-ol%me rel"tionships for $on-ersions in p%r$h"se"reements( 0o&e-er, the rel"tionship )et&een deree of $omp"$tion

of "re"tes in " h"%lin %nit or sto$+pile "nd th"t "$hie-ed in thistest method is %n+no&n( '%rther, "re"tes in h"%lin %nits "ndsto$+piles %s%"ll* $ont"in ")sor)ed "nd s%rf"$e moist%re the l"tter"e$tin )%l+in3, &hile this test method determines the )%l+ densit*on " dr* )"sis(

Sin$e &e did not did this experiment, o%r professor Enr(4"ti)"+ %st "-e %s the re6%ired d"t" th"t &ere needed in order to$omp%te for the %nit &eiht of $o"rse "nd 7ne "ref"tes( !fter$omp%tin for the s"id -"l%es, it $"n )e o)ser-ed th"t the $o"rse"re"ts h"-e " hiher %nit &eiht th"n the 7ne "re"tes(

CONCUSION EXP 8

In this experiment, the m"in o)e$ti-e &"s to determine the %nit&eiht of $o"rse "nd 7ne "re"tes( Sin$e &e did not re"ll* did thisexperiment, it is re"ll* h"rd to $on$l%de "n*thin( 9%t &ith f%rtherrese"r$h, it $"n )e $on$l%ded th"t the )%l+ densit* of s"nd is in-ersel*rel"tedto the porosit*of the s"me s"nd( .he more pore sp"$e in " soilthe lo&er the -"l%e for )%l+ densit*( !lso, the 9%l+ densit* or %nit

&eiht depends on :ol%me is o$$%pied)* )oth the "re"tes "nd the-oids )et&een the"re"te p"rti$les( "stl*, it is ne$ess"r* todetermine the )%l+ densit* -"l%es in the %se of m"n* methodsin sele$tin proportions for $on$rete mixt%res(

With re"din the pro$ed%res, I $"n s"* th"t in order to impro-ethe res%lts in this experiment ex"$tness in me"s%rin the &eihts m%st

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SSD o-er or %nder dr*in3, "ir entr"pped in s%spended s"mple ors"mple immersion $ont"iner, loss of m"teri"l d%rin tr"nsfer to theste"mer "nd some h%m"n errors in me"s%rin the ex"$t &eihtneeded in the experiment(