10 Way To Ensuring Durability Of Concrete - Civil Engineering

Friday, 7 June 2019

10 Way To Ensuring Durability Of Concrete

10 Way To Ensuring Durability Of Concrete

The following measures are generally taken to ensure the durability of concrete:
1. From the consideration of permeability the water-cement ratio is usually limited to 0.45 to 0.55.


2. The cement content should be such that it ensures sufficient alkalinity to prevent corrosion of reinforcement. For concreting under marine environment, minimum cement content of 350 kg/M3 or more is to be used. 


3. The water-cement ratio and the cement content must provide enough paste to overfill the voids in compacted concrete.


4. Use of Portland slag or pozzolana cement is advantageous for concreting in sea water.


5. Use of Portland cement having C3A content less than 5% is suitable for concreting under sulphatic environment.


6. The super-sulphated cement provides acceptable durability against acid
environment.


7. Addition of hydration additives is also helpful to prevent the deterioration of concrete.


8. It is possible to attain a marked improvement in the quality of concrete encouraging natural or artificial carbonation of the surface layer.


9. Deterioration of concrete can also be prevented treating concrete with solutions of suitable salts or even acids in minor concentration.


10. The durability of concrete can also be increased by impregnating the pores with a suitable polymer.

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