omc calculation

7/24/2019 OMC CALCULATION

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EFFECT ON OPTIMUM MOISTURE CONTENT AND

MAX DRY DENSITY BY TIME DELAY COMPACTION

OF SOIL-CEMENT MIXTURE

ByBy

SANDEEP NAGARKOTI

10CE3101410CE31014

Under the Guidance ofUnder the Guidance of

PROF. KOUSIK DEB

Depar!e" #$ C%&%' E"(%"eer%"(Depar!e" #$ C%&%' E"(%"eer%"(

IIT K)ara(p*rIIT K)ara(p*r


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C#"e"+C#"e"+

IntroductionIntroduction ObjectivesObjectives Scope of WorkScope of Work Work DoneWork Done ResultsResults Work to be doneWork to be done

ReferencesReferences


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I"r#,*%#"I"r#,*%#"

Soil-ceent are used a construction aterial for roads! airfields and other

purposes! any laboratory and field studies have been carried out in

connection "ith evaluation of its properties and perforance#

$eent is coonly used to iprove the echanical properties of soils

that e%hibit substantial chan&es in behaviour under fluctuatin&environental conditions 'i#e# oisture and teperature(

)he aount of ceent re*uired is specified either as a percenta&e of)he aount of ceent re*uired is specified either as a percenta&e of

ceent by "ei&ht of oven-dry soil aterial! or in pounds of ceent perceent by "ei&ht of oven-dry soil aterial! or in pounds of ceent per

cubic foot 'kilo&ra per cubic eter( of copacted soil+ceent#cubic foot 'kilo&ra per cubic eter( of copacted soil+ceent#

$eent stabili,ation has been "idely used to iprove the en&ineerin&$eent stabili,ation has been "idely used to iprove the en&ineerin&properties of the clayey soils#properties of the clayey soils#


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I"r#,*%#"I"r#,*%#"

Soil-ceent i%tures are also used to stabali,e in situSoil-ceent i%tures are also used to stabali,e in situ

sub&rades to iprove lon& ter perforance ofsub&rades to iprove lon& ter perforance of

paveent structures#paveent structures#

ortland ceent is readily available in ost urbanareas! and usually available in sei-urban areas! as it

is one of the ajor coponents for any buildin&

construction#


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I"r#,*%#"I"r#,*%#"

SOI.-$/0/1) S)2BI.I32)IO14SOI.-$/0/1) S)2BI.I32)IO14

there are three types of soil-and-ceent i%tures as follo"s41. P'a+% +#%'-e!e" is a hardened i%ture of soil and ceent that contains!

at the tie of placin&! enou&h "ater to produce a consistency siilar to

plasterin& ortar# It is used to line or pave ditches! slopes! and other areasthat are subject to erosion#

. Ce!e"-!#,%$%e, +#%' is an unhardened or sei hardened i%ture ofsoil and ceent# When relatively sall *uantities of ortland ceent are

added to &ranular soil or silt-clay soil the cheical and physical propertiesof that soil are chan&ed# $eent reduces the plasticity and "ater-holdin&

capacity of the soil and increases its bearin& value#In ceent-odifiedsoil! only enou&h ceent is used to chan&e the physical properties of thesoil to the de&ree desired#


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3.C#!pae, +#%'-e!e"! often referred to as siply soil-ceent! is a i%tureof pulveri,ed soil and calculated aounts of portland ceent and "ater that is

copacted to a hi&h density# )he result is a ri&id slab

havin& oderate copressive stren&th and resistance to the disinte&ratin& effects

of"ettin& and dryin& and free,in& and tha"in&.In order to achieve a successful bond the ceent particles need to coat ost of

the aterial particles so that upon hydration a crystalline structure is created

throu&hout the i%ture of particles.

)he "ater in the i%ture needs to be onitored to &uarantee sufficient

hydration of the ceent and also to ensure ade*uate "orkability of the i%.


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O/e%&e+O/e%&e+

)o deterine O0$ and the a% dry density of soil passin&)o deterine O0$ and the a% dry density of soil passin&

throu&h 5#67 sieve#throu&h 5#67 sieve#

)o deterine the effect of hydration "ith certain tie

intervals on O0$ and a% dry density of ceent-soili%ture.


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SCOPE OF TE 2ORK

Subjectin& all the saples prepared to proctor copaction test#Subjectin& all the saples prepared to proctor copaction test#

Developin& an understandin& of the iportance of hydration

reaction "hich leads to the &ain in stren&th of the saple#

Revie" and Understandin& of the iportance of the O0$ anda% dry density in stabili,in& a soil saple "ith ceent#

)o find out the relation bet"een the physical properties of soil

to stren&th &ain#

)ie delay copaction of ceent-soil i%ture at tieintervals taken as 8! 9! :! ; and :5 hours


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COMPACTION TEST

)his laboratory test is perfored to deterine the

relationship bet"een the oisture content and the dry

density of a soil for a specified copactive effort#

In the Standard roctor )est! the soil is copacted by a 7#7lb haer fallin& a distance of one foot into a soil filled

old# )he old is filled "ith three e*ual layers of soil! and

each layer is subjected to :7 drops of the haer#

Based on the "hole set of results! a curve is plotted for thedry unit "ei&ht 'or density( as a function of the "ater

content#


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C#!pa%#" C*r&eC#!pa%#" C*r&e

$opaction curve plotted ,vs .

)he peak of the curve is the 0a%iu

$opaction ',a%( at Optiu 0oisture$ontent '#p(.

#994%soil and => ceent is taken for a :#7 k&

saple "ith "ater content taken as ?! 98! 9:! 95!9= > respectively.


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Re+*'+Re+*'+


14/25


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O0$ @ 9;#?=>O0$ @ 9;#?=>

0a% dry density@ 9?#;A 1C;0a% dry density@ 9?#;A 1C;


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O0$ @ 97#A:O0$ @ 97#A:%%

0a% dry density @ 9?#6A 1C;0a% dry density @ 9?#6A 1C;


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O0$ @ 9=#A=>O0$ @ 9=#A=>

0a% dry density @ 9A#A= knC;0a% dry density @ 9A#A= knC;


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C#"'*+%#"C#"'*+%#"

2cc to the &raphs obtained in the previous slides2cc to the &raphs obtained in the previous slides

"e can conclude that "ith increase in the tie"e can conclude that "ith increase in the tie

interval there is an increase in the O0$ andinterval there is an increase in the O0$ and

a% dry density of the soil saple and it "asa% dry density of the soil saple and it "as

found that a% density is obtained at ; hourfound that a% density is obtained at ; hour

interval unlike e%pected = or :5 hour intervalinterval unlike e%pected = or :5 hour interval

due e%cess loss of oisture due to hydrationdue e%cess loss of oisture due to hydration..


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2ORK TO BE CARRIED OUT IN TE NEXT

SEMESTER:

$opaction "ork "ill be continued "ith the

ceent soil i%ture but "ith

94%soil ?> ceent

90%soil 98> ceent

With the sae tie &ap of 8! 9! :! ;! :5 hours.


24/25

Re$ere"e+Re$ere"e+

E5FE5F Saadeh S#! )ashan .#! 0asad /# and 0o&a"erSaadeh S#! )ashan .#! 0asad /# and 0o&a"erW#W# "Spatial and Directional Distribution of"Spatial and Directional Distribution of

Aggregates in Asphalt Mixes", Journal of TestingAggregates in Asphalt Mixes", Journal of Testingand Evaluation,and Evaluation, ol# ;8! 1o# =ol# ;8! 1o# =

E7FE7F Hunter 2#/#! 2irey G#D# and $ollop 2#$#Hunter 2#/#! 2irey G#D# and $ollop 2#$# "Effect"Effectof Asphalt Mixture Compaction on Aggregateof Asphalt Mixture Compaction on Aggregaterientation and Mechanical !erformance",rientation and Mechanical !erformance",

!roceedings of the th Conference on Asphalt!roceedings of the th Conference on Asphalt

!avements for South Africa,!avements for South Africa, Septeber :885#Septeber :885#E=FE=F http4CC"""#prip#tu"ien#ac#atC+hanburyCintroiphttp4CC"""#prip#tu"ien#ac#atC+hanburyCintroip !!

"A Short #ntroduction to Digital #mage"A Short #ntroduction to Digital #mage!rocessing"!rocessing"
http://www.prip.tuwien.ac.at/~hanbury/intro_iphttp://www.prip.tuwien.ac.at/~hanbury/intro_iphttp://www.prip.tuwien.ac.at/~hanbury/intro_ip


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omc calculation

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