M-25 CONCRETE MIX DESIGN
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As per IS 10262-2009 & MORT&H
| ||
A-1
| Stipulations for Proportioning | |
1
| Grade Designation | M25 |
2
| Type of Cement | OPC 53 grade confirming to IS-12269-1987 |
3
| Maximum Nominal Aggregate Size | 20 mm |
4
| Minimum Cement Content (MORT&H 1700-3 A) | 310 kg/m3 |
5
| Maximum Water Cement Ratio (MORT&H 1700-3 A) | 0.45 |
6
| Workability (MORT&H 1700-4) | 50-75 mm (Slump) |
7
| Exposure Condition | Normal |
8
| Degree of Supervision | Good |
9
| Type of Aggregate | Crushed Angular Aggregate |
10
| Maximum Cement Content (MORT&H Cl. 1703.2) | 540 kg/m3 |
11
| Chemical Admixture Type | Superplasticiser Confirming to IS-9103 |
A-2
| Test Data for Materials | |
1
| Cement Used | Coromandal King OPC 53 grade |
2
| Sp. Gravity of Cement | 3.15 |
3
| Sp. Gravity of Water | 1.00 |
4
| Chemical Admixture | BASF Chemicals Company |
5
| Sp. Gravity of 20 mm Aggregate | 2.884 |
6
| Sp. Gravity of 10 mm Aggregate | 2.878 |
7
| Sp. Gravity of Sand | 2.605 |
8
| Water Absorption of 20 mm Aggregate | 0.97% |
9
| Water Absorption of 10 mm Aggregate | 0.83% |
10
| Water Absorption of Sand | 1.23% |
11
| Free (Surface) Moisture of 20 mm Aggregate | nil |
12
| Free (Surface) Moisture of 10 mm Aggregate | nil |
13
| Free (Surface) Moisture of Sand | nil |
14
| Sieve Analysis of Individual Coarse Aggregates | Separate Analysis Done |
15
| Sieve Analysis of Combined Coarse Aggregates | Separate Analysis Done |
15
| Sp. Gravity of Combined Coarse Aggregates | 2.882 |
16
| Sieve Analysis of Fine Aggregates | Separate Analysis Done |
A-3
| Target Strength for Mix Proportioning | |
1
| Target Mean Strength (MORT&H 1700-5) | 36N/mm2 |
2
| Characteristic Strength @ 28 days | 25N/mm2 |
A-4
| Selection of Water Cement Ratio | |
1
| Maximum Water Cement Ratio (MORT&H 1700-3 A) | 0.45 |
2
| Adopted Water Cement Ratio | 0.43 |
A-5
| Selection of Water Content | |
1
| Maximum Water content (10262-table-2) | 186 Lit. |
2
| Estimated Water content for 50-75 mm Slump | 138 Lit. |
3
| Superplasticiser used | 0.5 % by wt. of cement |
A-6
| Calculation of Cement Content | |
1
| Water Cement Ratio | 0.43 |
2
| Cement Content (138/0.43) | 320 kg/m3 |
| Which is greater then 310 kg/m3 | ||
A-7
| Proportion of Volume of Coarse Aggregate & Fine Aggregate Content | |
1
| Vol. of C.A. as per table 3 of IS 10262 | 62.00% |
2
| Adopted Vol. of Coarse Aggregate | 62.00% |
| Adopted Vol. of Fine Aggregate ( 1-0.62) | 38.00% | |
A-8
| Mix Calculations | |
1
| Volume of Concrete in m3 | 1.00 |
2
| Volume of Cement in m3 | 0.10 |
| (Mass of Cement) / (Sp. Gravity of Cement)x1000 | ||
3
| Volume of Water in m3 | 0.138 |
| (Mass of Water) / (Sp. Gravity of Water)x1000 | ||
4
| Volume of Admixture @ 0.5% in m3 | 0.00134 |
| (Mass of Admixture)/(Sp. Gravity of Admixture)x1000 | ||
5
| Volume of All in Aggregate in m3 | 0.759 |
| Sr. no. 1 – (Sr. no. 2+3+4) | ||
6
| Volume of Coarse Aggregate in m3 | 0.471 |
| Sr. no. 5 x 0.62 | ||
7
| Volume of Fine Aggregate in m3 | 0.288 |
| Sr. no. 5 x 0.38 | ||
A-9
| Mix Proportions for One Cum of Concrete (SSD Condition) | |
1
| Mass of Cement in kg/m3 | 320 |
2
| Mass of Water in kg/m3 | 138 |
3
| Mass of Fine Aggregate in kg/m3 | 751 |
4
| Mass of Coarse Aggregate in kg/m3 | 1356 |
| Mass of 20 mm in kg/m3 | 977 | |
| Mass of 10 mm in kg/m3 | 380 | |
5
| Mass of Admixture in kg/m3 | 1.60 |
6
| Water Cement Ratio | 0.43 |
