Mix design for winter ultra strength C50 concrete;

The paper expounds the control of technological quality casting C50 concrete box beam with P.

The paper analyzed the problems of C50 concrete mix design,and proposed some protective measures.

Practical example of the preparation of C50 micro-expansive concrete;

Application of fly ash and grounded slag mixing to match C50 pumping concrete in the project;

Through the successful applicationinto basement of realistic engineering,such as Dushi Chuntian Building in Hengyang City,it is testified that using multi-mix-method and local cobble as coarse aggregate in mixing C50 pumping concrete can get asatisfying effect,that is to say this method is feasible.

Mix design method for high strength concrete;

Through technical reform,realize pump transporting the high strength concrete,simplify the constructing link,speed up the constructing progress,guarante the quality and accumulate the experience of the method.

This paper analyzes in details how to choose the original material of high strength concrete as well as introduces some common concrete mix design.