B 16
[Subsidiary]
L.N. 294/76.
L.N. 294/76. L.N. 95/78.
CAP. 123]
Building (Construction) Regulations
[1985 Ed.
TABLE IV
Ordinary concrete; grades I to V
3
Proportions of mix upper and lower limits
Aggregate
Total volume of aggregate
Designation
Nominal mix
per 45 kg of cement
Cement
Fine 45 kg
Coarse
m3
Resistance to crushing in MPa when tested in accordance with the First Schedule
Within 7 days after mixing
Within 28 days after mixing
Grade I
1-1-2
0.1
0.03
0.07
15
20
0.04
0.06
Grade II
1-1½-3
0.14
0.05
0.09
13.5
17.5
0.06
0.08
Grade III
1-2-4
0.19
0.06
0.13
12
15
0.08
0.11
Grade IV
1-3-6
0.29
0.1
0.19
8.6
11.3
0.12
0.17
Grade V
1-3½-7
0.33
0.13
0.25
6.5
8.6
0.15
0.33
* Sum of volumes of fine and coarse aggregates measured separately.
TABLE V
Quality A concrete: grades IA to IIIA
Proportions of mix upper and lower limits
Resistance to crushing in MPa when tested in accordance with the First Schedule
Total volume of aggregate
Designation
Nominal mix
per 45 kg of cement
Aggregate
Cement
Fine m3
Coarse m3
Preliminary tests
Works tests
Within 7 days after mixing
Within 28 days after mixing
Within 7 days after mixing
Within 28 days after mixing
Grade IA
1-1-2
0.10
0.03
0.07
0.04
0.06
32
41
24
31
Grade IIA
1-1½-3
0.14
0.05
0.09
0.06
0.08
26
34
20
26
Grade IIIA
1-2-4
0.19
0.06
0.13
0.08
0.11
21
27
16
20
* Sum of volumes of fine and coarse aggregates measured separately.