Reinforced and toughened polycarboxylate water reducer, preparation method and preparation device

Abstract

The invention discloses a reinforced and toughened polycarboxylate water reducer, a preparation method and a preparation device, and belongs to the technical field of polycarboxylate water reducer preparation. Add initiator solution and thermal storage ceramic powder to keep the same adding time, save the reaction time and at the same time make the materials mixed more fully and evenly, and improve the preparation efficiency of polycarboxylate water reducer; when the external temperature When it rises, the thermal storage porcelain powder will absorb a large amount of heat, so that the molecular chains in the polycarboxylate superplasticizer cannot absorb enough heat to decompose and break, maintain their original molecular properties, improve thermal stability, and significantly It improves its slump retention performance at high temperature; at the same time, due to the extremely low water absorption rate of heat storage porcelain powder, it reduces the HLB (water oil degree) value, reduces the possibility of cement particles and water forming bound water, and releases more Free water, thereby reducing cement paste viscosity.

Description

technical field [0001] The invention relates to the technical field of preparation of polycarboxylate water-reducer, more specifically, to a reinforced and toughened polycarboxylate water-reducer, a preparation method and a preparation device. Background technique [0002] In recent years, my country's infrastructure such as high-speed rail, highways, airports, dams, and municipal engineering has maintained rapid growth, and it has also promoted the rapid development of concrete admixture technology. The development of concrete admixtures can be roughly divided into the following stages: the first stage is the initial stage, represented by ordinary water reducer lignin; the second stage is the development stage represented by naphthalene-based superplasticizers, melamine, Sulfamate-based, aliphatic water-reducing agents and other water-reducing agents; the third stage is the current stage, which is the stage when concrete admixtures are moving towards the high-tech field, wi...

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Problems solved by technology

[0005] However, the existing polycarboxylate-based water-reducers are highly sensitive to temperature. When the temperature rises, the macromolecular chains in the product will move intensified, and chain decomposition and random fracture will easily occur, resulting in accelerated deterioration of the polymer. As a result, the quality of the water reducer product deteriorates. Therefore, at high temperatures, the performance of the polycarboxylate water reducer is poor and the slump retention is insufficient.

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