Foundation Concrete

In that case of a masonry wall, the footing is commonly of cement concrete mix of ration 1: 4: 8: or 1: 5: 10 (cement: sand: coarse aggregate). A size of coarse aggregate is limited to 40 mm. Lime concrete could also be used for this reasons.

For significant works, mixing of concrete should be completed in a mechanical mixer. Concrete should be laid (not thrown) within layers not exceeding 15 cm and well compacted. The concrete should be protected through moist gunny bags after about 1 or 2 hours of laying. Regular curing should be begin after 24 hours and be continued for 10 days. The masonry work over the bed concrete could be begin after 3 days of laying a concrete but curing along with in which of masonry should be continued.

For RCC column footings and raft foundations, a leveling course of lean concrete of 75 mm is laid within order to have an even and soil free surface for placing the reinforcement.