Concrete for shortening the steam curing period of cement poles

Abstract

The invention provides a concrete for shortening steam curing periods of cement electric poles. The concrete is prepared from the following raw materials in mass distribution ratio: 250-280 parts of cement, 35-50 parts of mineral powder, 35-50 parts of coal ash, 140-160 parts of residual grout, 640-670 parts of sand, 1150-1220 parts of gravels, 64-114 parts of water and 2.5-4 parts of a water reducer, wherein the residual grout is fresh grout immediately discharged after the centrifugation of electric poles is finished. The concrete for shortening steam curing periods of cement electric poles has the outstanding advantages of being moderate in flow property, proper in initial setting time, short in curing time and high in demoulding strength.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a concrete for shortening the steam curing period of cement poles. Background technique [0002] The traditional pole concrete is generally plain concrete without any additives or a small amount of water reducing agent added to the concrete. The forming principle of pole concrete is to drive the steel mold to rotate through a high-speed rotating centrifuge. Under the action of centrifugal force, the concrete is compacted and the annular cavity state of the pole is formed. In the process of high-speed centrifugation, stones, sand and cement with a large specific gravity will be accumulated in the outer layer of the annular cavity, while water with a light specific gravity will be placed in a large amount in the inner layer of the annular cavity. Therefore, the pole concrete must have a certain fluidity: if the fluidity is too small, it is extremely difficult to fill the mold, an...

AI Technical Summary

Problems solved by technology

The most critical thing is that the traditional pole concrete needs a long curing time to achieve the corresponding demoulding strength, which usually takes 6-7 hours. A set of molds can only produce 2 poles a day. It can be seen that the production output of poles is not high. high