What is the minimum grade of concrete as per IS 456?
Table of Contents
What is the minimum grade of concrete as per IS 456?
4, May 2013) IS 456 : 2000 recommends the minimum grade as M-20 for reinforced concrete.
Which grade of concrete is not applicable according to IS 456-2000?
So, all the design Parameter Mentioned in IS 456-2000 is applicable for the Grade of concrete less than M 55 and above M 55 grade of concrete, this standard is not applicable.
What is the minimum grade of concrete which can be used in RCC water tanks as per IS 3370?
M30
Explanation: As per codal provisions of IS 3370: Minimum grade of concrete for the R.C.C water tank is M30. Maximum cement content is 400 kg/m3 to take care of shrinkage effect.
What is the minimum grade of concrete for RCC exposed to sea water?
M 20 Grade
Concrete in sea-water or exposed directly along the sea-coast shall be at least M 20 Grade in the case of plain concrete and M 30 in case of reinforced concrete. The use of slag or pozzolana cement is advantageous under such conditions.
What is the maximum grade of concrete for RCC?
In India maximum grade of concrete used is M60 mostly, and the concrete used above this grade will be designed as self-compacting concrete to ensure compaction.
What is the minimum grade of concrete?
M20 is the minimum grade requirement of concrete for reinforced cement concrete work with mix ratio 1: 1.5: 3, means 1 part of cement, 1.5 parts of fine aggregate and 3 parts of coarse aggregate.
What is the minimum grade of concrete for PCC?
Detailed Solution
| Environment | Minimum grade of RCC | Minimum grade of PCC |
|---|---|---|
| 1. Mid | M 20 | – |
| 2. Moderate | M 25 | M 15 |
| 3. Severe | M 30 | M 20 |
| 4. Very severe | M 35 | M 20 |
What grade of concrete can be used for RCC?
If design mix concrete cannot be used for any reason on the work for grades of M-20 or lower, nominal mixes may be used with the permission of engineer-in-charge, which however is likely to involve a higher cement content. Accordingly all concrete of above M-20 Grade for RCC work must be of design mixes.
What is the minimum grade of concrete required for reinforced concrete?
IS : 456-2000 has recommended that minimum grade of concrete shall be not less than M-20 in reinforced concrete work. Design mix concrete is preferred to nominal mix.
What is the minimum grade of concrete for exposure condition?
If the structure is in the tidal zone of the sea then the exposure condition is extreme for which the minimum grade is M40. If the structure is exposed only to the sea water spray then the exposure condition is very severe for which the minimum grade is M35. What is the grade of concrete used in the construction of the Burj Khalifa building?
What is the ratio of cement in M25 grade of concrete?
In the IS: 456-2000 there is nothing mentioned of 1:1:2 ration for M-25 grade of concrete. Concrete of above M-20 must be design mixes. If one takes 1:1:2 ratio then the cement content comes to 528 kg/m 3. Where as IS: 456-2000 on page 19 clause 8.2.4.2 mentioned that OPC in excess of 450 kg/m 3 should not be used.