Mud-resistant concrete water reducing agent and preparation method thereof

Abstract

The invention relates to the technical field of concrete water reducing agent preparation, and discloses a mud-resistant concrete water reducing agent and a preparation method thereof. The preparation method comprises the following steps: 1, preparing a polycarboxylic acid mother solution; 2, preparing a quaternary ammonium salt oligomer; 3, preparing a mud-resistant polycarboxylic acid water reducing agent; 4, adding a mixed solution; and 5, stirring the mixed solution. According to the invention, the adverse effect of the silt content of the aggregate in the concrete on the polycarboxylic acid water reducing agent is avoided through the polycarboxylic acid mother liquor, the quaternary ammonium salt oligomer and the anti-mud polycarboxylic acid water reducing agent; and under the premise of not improving the doping amount of the polycarboxylic acid water reducing agent, the conditions that the slump loss is large and the concrete hardening strength is low due to insufficient water reduction of the concrete are avoided, the flowing property in the concrete pouring process is improved, and the situation that the flowing property and the slump retaining property of the concrete are obviously reduced along with increase of the mud content, and the requirement of high-performance concrete cannot be met is avoided.

Description

technical field [0001] The invention relates to the technical field of preparation of concrete water reducers, in particular to a mud-resistant concrete water reducer and a preparation method thereof. Background technique [0002] Concrete has become the most commonly used building material in today's society, and concrete water reducer is one of the commonly used admixtures for concrete. It always has good workability during transportation and construction. [0003] With the development of concrete science and the improvement of engineering requirements, the performance requirements of concrete water reducers are getting higher and higher. At present, the traditional concrete water reducers mainly include lignosulfonate, melamine and naphthalenesulfonate formaldehyde condensation products. Although these superplasticizers have many advantages, they are greatly affected by the mud content of the sand in the concrete, and are very sensitive to the mud content. With the incre...

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Problems solved by technology

[0004] The invention provides a mud-resistant concrete water-reducing agent and a preparation method thereof, which has the advantage of excellent mud-resistance, solves the problem of concrete loss over time caused by high content of sand and gravel, has the advantage of high water-reducing performance, and solves the problem of Solved the problem that cement, fly ash and other cementitious materials lead to the decrease of the strength of hardened concrete

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