Cement concrete

The cement concrete is mixture of cement, send , pebbles or crushed rock and water , which when placed in the skeleton of forms and allowed to cure becomes hard like a stone

Properties of cement concrete : 

1. It has high compressive strength 
2. It is free from corrosion and there is no appreciable effect of atmospheric agents on it 
3. It hardens with age and the process of hardening continues for a long time after the concrete has attained sufficient strength 
4. It is provided to be more economical than steel 
5. It binds rapidly with steel and as it is weak in tension , the steel reinforcement is placed in cement concrete at suitable places to take up the tensile stresses .this is termed as the R C C 
6. It forms a hard surface , capable of resisting abrasion.
7. Its final strength and quality depends entirely on local conditions and persons handling it.