Study on Influencing Factors of Physical and Mechanical Properties of C55 Self-compacting Concrete
In order to prepare C55 self-compacting concrete with excellent performance,the effects of the amount of cementing material,the a-mount of fly ash,the amount of sand and the amount of water reducing agent on its expansibility and compressive strength were studied.The re-sults show that the expansion degree of self-compacting concrete increases gradually with the increase of the amount of cementing material.When the amount of cementing material is 520kg/m3,the compressive strength of self-compacting concrete is the highest.With the increase of fly ash content,the expansion degree of self-compacting concrete increases gradually,and the compressive strength decreases gradually.With the gradual increase of sand rate,the expansibility and compressive strength of self-compacting concrete increase first and then decrease.When superplasticizer is not added,the expansion degree of self-compacting concrete increases gradually with the increase of superplasticizer content,and the compressive strength is basically unchanged.
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