1. Fine aggregate
It has a very large impact on performance, the fineness modulus is preferably 2.3-3.0, using continuous grading.
2. Addition agent
In the process of pumping, proper addition of some water reducing agent is not only beneficial to reduce the hydration heat of large volume concrete, but also effectively improve viscoplastic concrete and water retention.
3.Coarse aggregate
The ratio of coarse aggregate to pipe diameter should be 1:3, depending on the maximum size of the pipe diameter, and the content of flake particles must be less than 10%.
4. Cement
It is the most commonly used concrete material. Frequently used cement in order to prevent segregation in the case of mixed concrete conveyance. It has good water retention and water secretion. In general, Portland cement is the most commonly used.
