Mix Design PQC m40 Opc 53
Mix Design PQC m40 Opc 53
Mix Design PQC m40 Opc 53
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3 Sieve Analysis of coarse aggregate (10mm)
Coarse aggregate, amount taken = 5.0 kg
Weight
Sieve size % weight Cumulative Cumulative
Retained Remarks
(mm) retained % reatained % passing
(gm)
12.5 0 0 0 100
10 390 7.80 7.80 92.20 Sample complies
4.75 3970 79.40 87.20 12.80 to the
requirements of IS
2.36 490 9.80 97.00 3.00 383
ΣF=192
Fineness modulus = 192/100
= 1.92
Imapact Value= 8.75%
Specific gravity= 2.79
Crushing value= 15.48
Flakiness index= 8.50%
Elongation index= 13%
Water absorption= 0.54%
Weight
Sieve size % weight Cumulative Cumulative
Retained Remarks
(mm) retained % reatained % passing
(gm)
31.5
26.5
19.0 Sample
9.5 complies to
Table 600-3
4.75 of MORT&H
600µ 5th Revision
150µ
75µ
2
7 days 28.33N/mm2
28 days 34.00N/mm2
3
MIX DESIGN OF PAVEMENT QUALITY CONCRETE (M-40)
STEP 1 STIPULATIONS FOR PROPORTIONING
a. Grade Designation M 40
b. Type of cement OPC Grade 53 coforming to IS:-12269
c. Maximum nominal size of aggregate 20 mm
(MORT&H 5th
d. Minimum cement content 360 Kg/cum
Revision)
Maximum cement content 425 Kg/cum (IRC 15-2011)
e. Maximum water cement ratio 0.5
f. Workability 20±5 mm (slump)
g. Degree of supervision Good
h. Type of aggregate Crushed angular type
i. Maximum cement content 425 kg/cu.m of OPC
j. Chemical admixture type Sikament 170 SGD (Superplasticizer)
(density: 1.21 )
STEP 2 TEST DATA FOR MATERIALS
a. Cement used OPC Grade 53 coforming to IS:-12269
b. Specific gravity
Cement 3.15
Coarse aggregate 2.7
Fine aggregate 2.6
c. Water absorption
Coarse aggregate 0.50 %
Fine aggregate 0.80 %
d. Free (surface) moisture
Coarse aggregate 0.065%
Fine aggregate 0.41%
e. Sieve Analysis
1 Coarse aggregate 20mm down
2 Fine Aggregate Conforming to Zone II of Table 2 (IRC:44-
2008)
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The design flexural strength using IS:456 relationship fcr = 0.7 x sqrt(fck) = 4.86
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STEP 4 SELECTION OF WATER-CEMENT RATIO
Based on experience, we adopt water-cement ratio = 0.36
0.36 <0.5 Hence OK
STEP 5 SELECTION OF WATER CONTENT
From Table 5 of IRC:44-2008, water content for 20 mm aggregate = 186 kg/m3 at
W/C=0.5
As superplastisezer is proposed to be used, the water content can be reduced from 20% to 30% as per
para 7.2 of IRC:44-2008
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STEP 8 MIX CALCULATIONS
a. Volume of concrete = 1 m3
b. Volume of cement = 0.131 m3
c. Volume of water = 0.1488 m3
d. = 0.004 m3
Volume of
superplasticizer @
1.2% by mass of
cementitious material
Design Summary:
Total Concrete Volume: 357 m3
Total Cement Content: 2949 Bag (based on compacted volume)
Total Cement Content: 4541 Bag (based on loose volume, factor:1.54)
Total Fine Aggregate Volume: 89075 m3 3145684 cft
Total Coarse Aggregate Volume:
26.5 mm down 98844 m3 3490676 cft
10 mm down 65896 m3 2327117 cft
Total Superplasticizer: 1769 Kg