Abstract

A parametric experimental study has been conducted to investigate the effect of fly ash on the durability of the concrete composites. Four different fly ash contents (10, 15, 20 and 25% respectively) were used. The durability of concrete composites includes water impermeability, dry shrinkage property, the carbonation resistance and the freeze-thaw resistance. The results indicate that the addition of fly ash has greatly improved the water impermeability and restricted the dry shrinkage of concrete composites. With the increase of fly ash content, the length of water permeability and the dry shrinkage strain of the specimens have a tendency of decrease with the increase of fly ash content. However, the addition of fly ash has a little adverse effect on the carbonation resistance and freeze-thaw resistance of concrete composites. With the increase of fly ash content, the carbonation depth is increasing and the relative dynamic elastic modulus of the freeze-thaw specimen is decreasing gradually.

Keywords:

Durability, fly ash, high performance concrete,

References

Competing interests

The authors have no competing interests.

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Copyright

The authors have no competing interests.