Environment-friendly concrete pumping agent and preparation method thereof

Abstract

The invention discloses an environment-friendly concrete pumping agent which is characterized by comprising the following components in parts by weight: 8-13 parts of sulfobutyl-beta-cyclodextrin sodium, 4-7 parts of 2-chloroethyl sodium sulfonate modified hydroxyl-terminated hyperbranched nano hybrid polymer, 3-5 parts of rosin-based hyperbranched polyester, 10-15 parts of a polycarboxylic acid high-performance water reducing agent, 0.1-0.3 part of a defoaming agent and 45-65 parts of water. The invention further discloses a preparation method of the environment-friendly concrete pumping agent. The environment-friendly concrete pumping agent disclosed by the invention is good in pumping effect, good in water reducing and retarding performance, capable of effectively controlling the slumploss of concrete, high in durability, free of bleeding, good in cement adaptability, stable in quality and environment-friendly in product.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to an environmentally friendly concrete pumping agent and a preparation method thereof. Background technique [0002] With the rapid development of my country's construction industry and the acceleration of infrastructure construction, concrete materials are widely used in various projects. Generally, concrete is poured by pumping at the construction site. Therefore, the concrete needs to have good fluidity and pumpability. However, since the concrete in the mixing station is transported from the mixing station to the construction site by a concrete mixer truck, once the traffic jam Or the distance is long, and the mixing time of the concrete is too long, and the fluidity will be seriously lost and cannot be pumped. In order to meet the common needs of concrete performance and construction, the usual method is to add pumping agent to concrete. The performance of the pum...

AI Technical Summary

Problems solved by technology

Concrete pumping agents currently on the market generally have poor cement adaptability, usually only suitable for a few cement varieties, poor fluidity, crystals and precipitation under low temperature conditions in winter, causing pipeline blockage, and cannot be used normally. At the same time, the quality is extremely poor. Stable, fast loss of slump, which seriously affects various concrete projects

In addition, the existing commonly used concrete pumping agents usually contain low-concentration naphthalene-based high-efficiency water reducers, which generally have a large amount of crystallization at low temperatures, low cohesion, large slump loss, and pollute the environment. And other issues

[0004] The Chinese invention patent with application number 201210549972.7 discloses a slump-preserving concrete pumping agent, which contains naphthalene or its homologues, aliphatic compounds, sodium gluconate, carboxylic acid graft copolymers, sodium lauryl sulfate, formaldehyde Cellulose, hydroxypropylmethyl cellulose; wherein naphthalene or its homologues account for 60%-80% by weight; aliphatic compounds account for 6%-8% by weight; sodium gluconate accounts for 1% by weight -5%; the weight percentage of carboxylic acid graft copolymer is 1%-5%; the weight percentage of sodium lauryl sulfate is 1%-3%; the weight percentage of formaldehyde cellulose is 0.1%- 0.5%; the percentage by weight of hydroxypropyl methylcellulose is 0.1%-0.5%, and the rest is water; the slump-preserving concrete pumping agent of the invention, on the basis of summarizing the commonly used methods for controlling slump loss, carboxylic acid The graft copolymer is compounded into the naphthalene-based water reducer, which has the characteristics of good dispersibility and strong slump retention ability, and solves the problem of rapid slump loss of concrete mixed with naphthalene-based pumping agents; however, this type of The environmental protection performance of pumping agent needs to be further improved

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