Concrete shrinkage compensating pumping agent

Abstract

The invention belongs to the technical field of concrete additives, and particularly relates to a concrete shrinkage compensating pumping agent. The concrete shrinkage compensating pumping agent is prepared from, by weight, 45-65 parts of polycarboxylate superplasticizer, 10-22 parts of aluminum ammonium sulfate, 6-14 parts of coco fatty acid diethanol amide, 2-8 parts of sepiolite, 5-13 parts of sodium citrate, 1-8 parts of sodium glucoheptonate, 1.2-2 parts of zinc stearate and 45-65 parts of water. The concrete shrinkage compensating pumping agent can compensate for concrete shrinkage and also can meet the pumping agent performance requirement and the pumping construction demand.

Description

Technical field [0001] The invention belongs to the technical field of concrete admixtures, and particularly relates to a concrete shrinkage compensation pumping agent. Background technique [0002] At present, the general concrete is poured by pumping technology at the construction site. Therefore, it is necessary for the concrete to have good fluidity and pumpability. However, because the concrete of the mixing station is transported from the mixing station to the construction site by the concrete mixer truck, once In traffic jams or long distances, the mixed concrete will take too long and serious loss of fluidity will occur and it will not be able to be pumped. The emergence of concrete pumping agents solves this problem. Concrete pumping agent is an admixture that can improve the pumping performance of concrete mixtures, so that the concrete mixture can pass through the conveying pipeline smoothly, without blocking, segregation, and good viscoplastic properties. It is usual...

AI Technical Summary

Problems solved by technology

If the early cracks produced by pumping concrete are not properly treated before final setting, the width of concrete cracks will increase, and the length of cracks will grow and penetrate, resulting in concrete leakage, corrosion of steel bars, and reduced strength, which will seriously affect buildings. Durability and service life

[0004] In order to solve the above problems and meet the common needs of concrete performance and construction, the usual method is to add one or two functional admixtures and pumping agents to the concrete to form a mixture, which not only increases the construction Difficulty and production costs, and it is very easy to repeatedly add the same or similar components in several concrete admixtures, resulting in excessive or missing additions, etc., especially when encountering poor or even incompatible compatibility When several kinds of concrete admixtures are used, the effectiveness of the admixtures will be reduced. The light results will cause concrete water leakage, segregation, and hardening, which will reduce until the loss of working performance, so that pumping cannot be performed. In severe cases, it will cause construction safety accidents and serious concrete quality. accidents, thereby endangering the safe life of the building