Novel water reducer containing phosphate group, and preparation method thereof

Abstract

The invention belongs to the technical field of concrete admixtures, and especially relates to a novel water reducer containing a phosphate group, and a preparation method thereof. The preparation method of the novel water reducer containing the phosphate group comprises the following steps: preparing a monomer containing the phosphate group, and carrying out a polycondensation reaction on the monomer and a fused ring compound containing a polyether side chain in order to obtain the novel water reducer containing the phosphate group. The obtained novel water reducer containing the phosphate group has a much better water reducing effect than traditional naphthalene-based water reducers, also has a strong slump retaining performance, and greatly improves the state of the concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a novel phosphoric acid group-containing water reducer and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of infrastructure facilities, the demand for additives is increasing. Concrete water reducer is an indispensable admixture for high-performance concrete. It refers to an additive that can reduce the amount of mixing water when the amount of concrete and cement remains unchanged. It is the largest and most widely used concrete admixture. It can reduce water consumption, improve concrete strength and durability, and improve concrete workability and fluidity. [0003] As the representative of the second generation of water reducing, naphthalene series is currently one of the largest and most widely used water reducing agents in China. Its cement adaptability is good and th...

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Problems solved by technology

[0003] As the representative of the second generation of water reducing, naphthalene series is currently one of the largest and most widely used water reducing agents in China. Its cement adaptability is good and the price is cheap. However, due to its general water reducing rate, the loss of concrete slump quick

At present, in order to improve this situation, many manufacturers usually compound some retarders such as sodium sugar, but it is also prone to bleeding and segregation during use, which affects the early strength of concrete.

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