In spite of the best precautions taken to store cement, it is found that its strength is reduced due to long storage. Efforts should, therefore, be made to store the cement for lesser time. The strength of the cement, which has been stored for a long time, should be checked before it is used on important works. The expected reduction in strength of concrete with stored cement is given below.
|
Period of Storage |
Relative Strength (percent) at 28 days |
|
Fresh |
100 |
|
3 months |
80 |
|
6 months |
70 |
|
1 year |
60 |
|
5 year |
50 |
What is the source of your data? It would be helpful.
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From manufacturing date of cement, how many days persist to retain fresh?