Polycarboxylic acid water reducer prepared from running water and preparation method of polycarboxylic acid water reducer

Abstract

The invention relates to the technical field of concrete admixtures, and particularly relates to a polycarboxylic acid water reducer prepared from running water and a preparation method of the polycarboxylic acid water reducer. According to the method, with unsaturated polyoxyethylene ether and acrylic acid as monomers and hexamethylene tetramine as a water clarifying agent, through adjusting the mixture ratio of an oxidant, a chain transfer agent and each monomer, the polycarboxylic acid water reducer, which is high in water-reducing rate and fluidity and good in slump hold ability is prepared from running water at room temperature. The polycarboxylic acid water reducer can be synthesized by running water at room temperature, and the preparation method is simple in process, and short in reaction time; hexamethylene tetramine added in the reaction can play a water purification effect and also has the anticorrosion ability; and the synthesized water reducer is good in effect, and has good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to a polycarboxylate water reducer prepared from tap water and a preparation method thereof. Background technique [0002] Water reducer is the largest and most widely used admixture in cement concrete admixtures. Compared with the previous water reducers, the polycarboxylate water reducer has the advantages of simple production process, high water reducing rate, low slump loss, small shrinkage rate, and environmental friendliness. It is recognized at home and abroad after wood calcium and naphthalene series. The developed third-generation high-performance water reducer. [0003] At present, the synthesis process of polycarboxylate superplasticizers requires relatively high water. In the prior art, deionized water is mostly used for the preparation of polycarboxylate superplasticizers. Chinese patent application (CN103275280A) discloses a method for synthes...

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Problems solved by technology

Chinese patent application (CN103275280A) discloses a method for synthesizing polycarboxylic acid-type high-slump water-reducing agent at room temperature by using tap water. This method is too sensitive to sand and gravel in different regions, and the adaptability is not strong, and the reaction process requires heating. The reaction process is too cumbersome. Chinese patent application (103275280A) discloses a normal temperature synthesis method of a polycarboxylic acid type high slump water reducer. The water reducer is synthesized at room temperature using tap water, but this method uses a synthetic intermediate as a water treatment agent. The water purification effect is not good, it is easy to cause catalyst poisoning, and the success rate of the reaction is low. Therefore, it is particularly important to seek a quick method for preparing polycarboxylate water reducer using tap water at room temperature.

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