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SEMINAR ON
By
SUDARSHAN BAROLE15CE64R07
Guide
DR. DEBASIS ROY
DEPARTMENT OF CIVIL ENGINEERING
INDIAN INSTITUTE OF TECHNOLOGY
KHARAGPUR
SIZE DISTRIBUTION OF COARSE-GRAINED
SOIL BY SEDIMAGING
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1. INTRODUCTION
1.1 PARTICLE SIZE DISTRIBUTION Most fundamental property of coarse grained soil
It is useful to predict the range of engineering properties like void ratio
,unit weight , angle of internal friction , hydraulic conductivity etc of soil.
Commonly use to decide the acceptance criteria for fills, soil filter and
paving material.
It is also useful to give idea about the suitability and selection of ground
modifications methods such as grouting , vibratory densification , ground
freezing and electro osmosis.
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1.2 TRADITIONAL METHOD FOR PARTICLE-SIZE DISTRIBUTIONOF COARSE GRAINED SOIL
By perform!" #e$e %!%&y## of #o&.Se' of #e()e!'%&&y %rr%!"e* #e$e o!e o$er '+e
o'+er ! $er',%& p&%!e #),+ '+%' '+e #e$e +%$!"m%m)m %per')re %' '+e 'op %!* m!m)m #e of
%per')re %' /o''om
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Se' of #e$e# Se$e #+%0er
1. App%r%')# for perform!" #e$!" 'e#' o!#o&
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1. DISAD3ANTAGES OF SIE3E ANAL4SIS
I' # 'me ,o!#)m!" %# r)!!!" #e$e #+%0er%!* 5e"+!" e%,+ #e$e '%0e % &o' of 'me.
C&o""!" of ope!!" of #e$e %f'er )#e.Co#'&y 'o p)r,+%#e6 )#e %!* m%!'%! #e$e6
#e$e #+%0er %!* #,%&e#.
I' # !o#y %!* %o !'ro*),e %r/or!e
p%r',)&%'e# ! 'o '+e &%/or%'ory.
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2. SEDIMAGING
T+e 'erm #e*m%"!" ,%! /e #mp&fy %# #e*me!' p&)# m%"!".
A !e5 me'+o* re,e!'&y *e$e&op 'o *e'erm!e '+e p%r',&e #e*#'r/)'o! of ,o%r#e "r%! #o&.
T+# me'+o* # pr%,',%&&y mp&eme!'e* /y Hyo!-#+o0 O+m %!*
Rom%! D. Hry,5 ' "$e# '+e p%r',&e #e *#'r/)'o! for p%r',&e# /e'5ee!
7.789mm %!* 2.7 mm
T+# 'e#' %o +e&p 'o *e'erm!e '+e per,e!'%"e :!er '+%! .789mm
2.1 I!'ro*),'o!
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T+e #e*m%"!" 'e#' # /%#e* o! m%"!" 'e,+!()e#.
No5 % *%y m%"!" 'e,+!()e# +%$e /ee! 5*e&y %*op'e* !
m%!y :e&*# &0e me*,%& 6 %ero#p%,e 6 *efe!#e %!* !%'o!%&#e,)r'y e',.
For e%mp&e ! me*,%& *%"!o##6 'oo &0e m%"!e',re#o!%!,e m%"!";MRI< %!* ,omp)'e* 'omo"r%p+y;CT<#,%!
For #e,)r'y m%"e# of f%,%& fe%')re#6 :!"erpr!'#6 +%!*"eome're# %!* r#e# 'o *e!'fy % per#o!.
2.2 B%,0"ro)!*
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By )#!" '+# 'e,+!()e 6 % 'e#' !%me* %# '&'!" /%,0&''r%!#&),e!' #e"re"%'o! '%/&e;TST< for o/'%!!" '+e #e*#'r/)'o! of p%r',&e ! '+e 7mm 'o 2mm r%!"e #*e$e&ope*
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I! 277 #+! %!* Hry,5 *e$e&ope* %! m%"e pro,e##!"'e,+!()e /%#e* o! 5%$e&e' 'r%!#form%'o!.
B)' *)e 'o %/#e!,e of +"+ re#o&)'o! ,%mer% %!*
&%/or%'ory 'e#'!" #y#'em %' '+%' 'me6 '+e %/o$e ,o!,ep'5%# o!&y % '+eore',%& ,o!,ep'
O+m %!* +ry,5 '+e! 'r%,0e* '+e *e$e&opme!' of ,%mer%'e,+!o&o"y )!'& 27-7 me"%pe& ,%mer% /e,%me %$%&%/&e! e%r&y 2717.
2. EARL4 ATTEMPS TO=ARD SEDIMAGING
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T+e #e*m%"!" #y#'em for #!" p%r',&e# ! '+e 2.7 mm'o .789mm r%"e ,o!##'# of fo&&o5!" ,ompo!e!'#
1. #e*me!'%'o! ,o&)m!
2. Se*me!' %,,)m)&%'or. Pre #e"re"%'o! ')/e
. S)ppor' 'o5er %!* /%#e
9. Po#'o!!" #y#'em
>. Co!!e,'or %!* *r%!%"e #y#'em
8. DSLR C%mer%
?. ,omp)'er
2. SEDIMAGING HARD=ARE
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2..1
Se*me!'%'o
! ,o&)m!
Se*me!'%,,)m)&%'or
Pre #e"re"%'o!')/e
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#e"re"%'or %!* % re&e%#e me*)m 'o !'ro*),e '+e #pe,me!!'o 5%'er :&& ,o&)m!.
1>.2 me"%pe& N0o! D8777 ,%mer% 5'+ %! AF-S M,ro
!00or >7mm &e!# # )#e*
2..1 *e#,rp'o! %/o)' ,ompo!e!'#
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I! or*er 'o ,re%'e#&"+'&y $%,))m!#*e pre-#e"re"%'or6
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