During manual concreting of a raft footing which was designed for M25 grade concrete, the estimated cement required was 240 bags, while the laborers due to sheer negligence have added only 140 bags. The Soil conditions are good. There was ...
< strong>contact pressure is the pressure between footing end and soil strata where we rest the footing. we should have safe contact pressure to avoid foundation failure like (punching failure, shear failure, excessive settlement of the foundation, etc. ) it is express by load per area it isRead more
< strong>contact pressure is the pressure between footing end and soil strata where we rest the footing.
we should have safe contact pressure to avoid foundation failure like (punching failure, shear failure, excessive settlement of the foundation, etc. )
it is express by load per area
it is depending on
- elastic property of soil
- type of foundation either flexible or rigid
- type of soil and its various property
see the figure to more understanding
Komal Bhandakkar
Effect of cement content on strength of footing: The result reveals that the strength of concrete Foundation increases with increasing cement content in it. However, for concrete with cement content more than 150 kg per metre cube then the strength increases with the increase in the size of coarse aRead more
Effect of cement content on strength of footing:
The result reveals that the strength of concrete Foundation increases with increasing cement content in it.
However, for concrete with cement content more than 150 kg per metre cube then the strength increases with the increase in the size of coarse aggregate up to 25 mm and decreases as the aggregate size increases beyond 25mm.
Without a proper range of cement in the mixture then low strength development or excessive shrinkage may occur leading to premature deterioration.
Thank you.
See less