concrete lab calculations
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SLUMP TEST
Workability requirement of concrete:
SL.NO PLACING CONDITIONSDEGEREE OF
WORKABILITY
SLUMP(mm)
1Shallow sections and pavement
using pavesVery low 0-!
"ass concrete# lightly reinforced
concrete sections# floor# hand placed
pavements# canal lining #strip#
foundation# columns# floors# hand
pavements# canal lining# strip
footing
$ow !-%!
&
'earing reinforced sections in
beams# walls# slabs# columns# slip
form work# pumped concrete(
"edium %!-100
) *rench fill# in-situ piling 'igh 100-1!0
CALCULATION:-
+iven "i, proportions
.ement
W/. ratio
ine aggregate
.oarse aggregate
Volume of the slump cone
equired volume of the mi, for the slump cone
2uantity of cement required for the slump cone
2uantity of fine aggregate required for the slump cone
2uantity of coarse aggregate required for the slump cone
2uantity of water
Compac!o" #aco$
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OBSER%ATION:-
.ylinder si3e
Weight of empty cylinder 4w15
Weight of empty cylinder 6 partially compacted concrete4w5
w-w1
weight of cylinder 6 fully compacted concrete 4w&5
w&-w1
.ompaction factor
COMPRESSION STRENGT& OF CONCRETE
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OBSER%ATION'-
SL.NOS! o#
c*+
W!,
(K,)
A$a o#
oa/!",
#ac(mm0)
Comp$11!o"
oa/ a #a!*$
(N)
Comp$11!2
1$",
(N3 mm0)
1
&
CALCULATION:-
7rea of compression surface
.ompressive strength failure
8
SPLITING TENSILE STRENGT&
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OBSERA%TION:-
SL.NO S! o# c4!"/$ B$a5!", oa/ (N)Sp!!", "1! 1$",
(N3mm0)
1
&
CALCULATION:-
Spliting tensile strength of the specimen is calculated by using
Where
9 is the breaking load
d is the diameter of the specimen in mm
lis the length of the specimen in mm(
*Sp1
*Sp
FLE6URE STRENGT& OF CONCRETE
OBSER%ATION:-
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8f $ mm# l mm b;d mm
8f $ mm# l mm b;d mm
.onsidering
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Biameter
'eight
TABULATION:-
Loa/ KND#o$ma!o"
S$11 N3mm0 S$a!" = >-?
D!2 mm
i5 Stress
ii5 stress
iii5 stress
iv) stress
i5 strain ii5 strain
iii5 strain
!2) 1$a!" @
F$om ,$ap stress
Strain
C
FLAKINESS INDE6
DIMENSIONS OF FLAKINESS INDE6
S! o# a,,$,a (mm)T!c5"11 o# ,a*, (mm)
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Pa11!", $o*, IS 1!2
(mm)Ra!"/ o" IS 1!2(mm)
OBSERA%TION AND CALCULATION
S! O# A,,$,a !" mm W!, O# T!c5"11 o# W!, o#
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(mm)Pa11!", $o*,
IS 1!2 (mm)
Ra!"/ o" IS 1!2
(mm)
OBSER%ATION AND CALCULATION:-
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S! o# a,,$,a !" mm W!, O#
A,,$,a
#$ac!o" pa11!",
a"/ $a!"/
(co"1!1!", o# aa1 0> p!c1)
L", o# ,a*,
(mm)
W!, o#
a,,$,a
#$ac!o"
$a!"/ o"
", ,a*,
Pa11!", $o*,
IS 1!2 mm
Ra!"/ o"
IS 1!2 mm
*otal weight
Clongation inde, 9/W , 100
AGGREGATE CRUS&ING STRENGT&
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CALCULATION:-
*he ratio of the cut of fines formed to the total weight of sample in each test is e,pressed
has a percentage( *he result is recorded to the first decimal place(
Where
Aweight of fraction passing the appropriate sieve
7weight of surface dry sample
*he mean of the two results to the nearest whole number is reported as the aggregate
crushing value of the si3e of material tested(
Weight of surface dry sample
Weight of fraction passing sieve
TABULATION:-
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Nom!"a IS 1!2 mm
D!am$ o# c4!"/$
o + *1/ (mm)
S! o# IS 1!21 #o$
1pa$a!", #!"1Pa11!", $o*, IS
1!2 mm
Ra!"/ o" IS 1!2
mm
7ggregate crushing value
AGGREGATE IMPACT %ALUE:-
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CALCULATION:-
*he ratio of the weight of fines to the total sample weight in each test is e,pressed as a
percentage # the result being recordable to the first decimal place(
Where
Aweight of fraction passing the appropriate sieve
7weight of surface dry sample
8mpact value A /7 D 100
8mpact value
AGGREGATE ABRATION TEST:-
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SPECIFICATION FOR LOS ANGLES TEST:-
GRAD
ING
WEIG&T IN ,m OF EAC& TEST SAMPLER IN SI7E
NO OFSP&ERES
WEIG&T
OFC&ARGE
(,m)9>->
B-C>
C>-?>
?>-0C
0C-0>
0>-:0.C
:0.C-:>
:>-.B
.B-?.
C
?.
C-0.B
E*olerance of F percent is permitted(
OBSER%ATIONS:
Cmpty weight
=riginal weight of aggregate sample W1
Weight of sample retained on 1(%mm sieve W
$oss in weight due to wear W& W1- W
7brasion value 4W&/W15 , 100
PENETRATION TEST ON BITUMEN
OBSER%ATION:
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9assing temperature
oom temperature
9eriod of cooling in atmosphere
9eriod of cooling in water path
7ctual test temperature
TABULATION:-
SL.NO PENETROMETER DIAL READING STANDARD
DE%IATIONINITIAL FINAL PENETRATION
%ISCOSITY TEST
%ISCOSITY GRADING OF BITUMEN AND CONSISTENCY PROPERTIES
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SL.NO%ISCOSITY
GRADING
ABSOLUTR
%ISCOSITY AT
>>C
KINEMATIC
%ISCOSITY AT
> 131 (m!")
RANGE OF
PENETRATION
%ALUE AT
0>CC
%ISCOSITY GRADING ADOPTED IN INDIA FOR PASSING APPLICATION IS AS
FOLLOWS
V+)0 Gse in high stressed area like intersection S1 toll pla3a truck terminals truck lay-byes
in lieu of &0/)0 grade
V+&0 9aving application areas like most part of lieu of 0/%0 grade of bitumen
V+0 9aving 7pplication in cold climate conditions of orth 8ndia and in high altitude
regions
V+10 Spraying application# pouring application in cold regions in lieu of H0/100 grade
OBSER%ATION:
"aterial Aitumen
+rade
Specified temperature
Si3e of orifice
7ctual test temperature
Viscosity
DUCTILITY TEST
DUCTILITY %ALUE REUIREMENTS FOR PA%ING BITUMEN AS PER BIS
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PROPERTY %G> %G0> %G> %G?>
Buctility at !oc
cm minimum
after thin film
oven test
OBSER%ATION'
+rade of bitumen
9ouring temperature (
PERIODS OF COOLING
15 8n air
5 8n water bath before trimming
&5 8n water bath after trimming
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