Micro-crosslinking viscosity-reducing mud-resistant polycarboxylic acid water reducer and preparation method thereof

Abstract

The invention discloses a micro-crosslinking viscosity-reducing mud-resistant polycarboxylic acid water reducer and a preparation method thereof, and solves the technical problems that: a gravel material with high mud content can quickly adsorb a polycarboxylic acid water reducing agent in the prior art in a short time, so that the flowability, slump retaining property and other properties of primarily mixed concrete are severely lost, and the working performance is lost. The micro-crosslinking viscosity-reducing mud-resistant polycarboxylic acid water reducer is prepared from the following raw materials in parts by weight: 180-220 parts of unsaturated polyether macromonomer, 25-35 parts of an unsaturated acid (anhydride) small monomer, 3-9 parts of an unsaturated silane monomer, 4-6 parts of a chain transfer agent, 12-18 parts of a single electron oxidant, and 220-280 parts of water. According to the micro-crosslinking viscosity-reducing mud-resistant polycarboxylic acid water reducer and the preparation method thereof provided by the invention, the viscosity of concrete can be reduced, so that the concrete has more excellent construction performance.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to a micro-crosslinked viscosity-reducing and mud-resistant polycarboxylate water reducer and a preparation method thereof. Background technique [0002] With the rapid development of concrete technology, concrete is widely used in roads, bridges, dams and civil buildings. The demand for concrete is increasing year by year, both in national projects and civil projects. However, as the country regards sustainable development as a basic national policy and pays more and more attention to the protection of the ecological environment, the mining of sand and gravel materials required for concrete is subject to more and more restrictions. Therefore, there is a serious shortage of high-quality coarse and fine aggregates, and machine-made sand gradually enters the market, resulting in higher and higher mud content in concrete. The increase in mud content leads to th...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a micro-crosslinked viscosity-reducing and anti-mud type polycarboxylate water reducer and its preparation method, to solve the problem of sand and stone materials with high mud content on the polycarboxylate water reducer in the prior art. Rapid adsorption in a short period of time causes serious loss of fluidity, slump retention and other properties of the freshly mixed concrete and loses working performance. At the same time, it solves the technical problem of high viscosity and difficult pumping of high-mud concrete

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