M25 mix design as per IS 10262
What is mix design
Cement fine aggregate and coarse aggregate and admixture with water mix proportional in kilogram and ratio is called mix design.
Details of sample : concrete mix design (with FOSROC,BASF, AURMAIX 200 admixture )
Test Required :determination of mix proportion for M-25 grade concrete
Report :
- Coarse aggregate was supplied in two size (i) 20 mm (ii) 10 mm. the properties of the coarse aggregate and fine aggregate (sand) are given in Appendix -A
- The cement Supplied was PPC, BIRLA GOLD cement Y 2021.The properties are given in Appendix-B
- Trial mix were cast and tested as per IS: 456-2000 and IS :10262-2009 & SP -23
- Saturated surface dry aggregates were used as per IS : 10262-2009
- Degree of control- Good
- Exposure condition Moderate
|
Grade of
concrete |
Water |
cement |
Sand |
CA-(10 mm) |
CA-(20 mm) |
Remarks |
|
M-25 |
0.47 |
1 |
1.69 |
1.23 |
1.85 |
By Weight |
SL No Test M-25 Grade
1. 1. Compaction Factor Achieved in the 0.88
2. 2. Target Strength
N/mm2 31.6
3.
(i) 7-days cube Compressive Strength achieved in
the Laboratory N/mm2 22.7
(ii) 28-days cube Compressive Strength achieved in
the Laboratory N/mm2 32.4
4. 3. Consumption of material per cubic material of
concrete
(ii) Cement (Kg) 383
(iii) Sand (kg) 646
(iv) CA-10 mm (kg) 472
(v) CA-20 mm (kg) 709
(vi) Admixture (FOSROC, AURMAIX 200) (Litre) 1.665
1. 1.Test for 20mm and 10mm Coarse
aggregate
1.
(i)Result of course aggregate supplied by client
(ii)As
per IS 383-1970 % aggregate passing of graded of nominal size 20 mm
|
Analysis of
CA Friction |
Percentage of
different friction |
|
|
|
|
CA-20 mm |
CA-10 mm |
CA-20 60% |
CA-10 40% |
Combined
graded Aggregate |
|
Sieve size |
% of passing |
% of Passing |
% of passing |
% of passing |
% of passing |
As per is 383 |
|
40 mm |
100 |
- |
60 |
40 |
100 |
100 |
|
20 mm |
92.0 |
- |
55.2 |
40 |
95.2 |
95-100 |
|
16mm |
- |
100 |
- |
- |
- |
- |
|
12.5 mm |
- |
100 |
- |
36.24 |
36.2 |
- |
|
10 mm |
18.2 |
44.8 |
10.92 |
17.92 |
28.8 |
25-55 |
|
4.75 mm |
3.6 |
4.1 |
2.16 |
1.64 |
3.8 |
0-10 |
3.
Flakiness index
18.5% 18.8% 25%
maximum
4.
Moisture content 0.40% 0.40%
5.
Deleterious material Nil Nil 5%
maximum
6.
Specific gravity 2.63 2.63
7.
Aggregate crushing 28.5% 29.1% 30%
maximum
8.
Aggregate impact value 28.2% 28.6% 30%
maximum
2.Tests
for fine Aggregate (Sand)
(i)
|
IS Sieve size mm |
Test result % of passing |
As per 383
Grading zone –(iii) |
|
4.75 mm |
98.0 |
90-100 |
|
2.36 mm |
94.3 |
85-100 |
|
1.18 mm |
87.1 |
75-100 |
|
600 micron |
70.2 |
60-79 |
|
300 micron |
14.4 |
12-40 |
|
150 micron |
4.4 |
0-10 |
|
Bulking of sand |
24.6% |
- |
(ii) Clay silt impurities 1.8% 8%
maximum
(iii) Present of deleterious material 1.3% 5%
maximum
(iv) Free moisture content 1.2%
(v) Specific gravity 2.65
Concrete Mix Design Trial For M-25 Grade of concrete
|
Trial no |
Free water
cement Ratio |
Cement
content kg/m3 |
Water content
(kg/m3 |
Workability
of concrete in Term of C.F |
7-Days
compressive strength (N/mm2 |
28-Days
compressive strength (N/mm2 |
Remarks of M-25 graded |
|
1 |
0.48 |
375 |
180 |
0.91 |
21.3 |
31.5 |
|
|
2 |
0.47 |
383 |
180 |
0.88 |
22.7 |
32.4 |
|
|
3 |
0.46 |
391 |
180 |
0.84 |
23.1 |
32.8 |
|
Remarks trail no 2 is recommended for m-25 graded concrete
mix design
Details of sample :Birla gold cement, PPC ,Y-2021
Test Required : Physical properties of cement
REPORT
SL
NO Test Result
1. 1. Fineness by dry sieving (90 micron) 1.1%
2. 2.Consistency of standard Cement paste 31.0%
3. 3. Sound ness test 1.10mm
4. 4. Specific gravity 3.05
5. 5. Setting time
(i)
Initial setting time 140
mins
(ii)
Final setting time 450
mins
6. 6. Compressive strength
Cement
standard sand ratio 1:3
(i)
3- Days strength 23.1
N/mm2
(ii)
7- Days strength 33.1
N/mm2
(iii)
28- Days strength 33.1
N/mm2
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