A cement hydration heat control material and its preparation method

Abstract

The invention provides a preparation method of a novel cement hydration and thermal control material. According to the novel cement hydration and thermal control material, a low molecular weight sugar unit is connected with a main polymer chain through a benzene ring; the preparation method comprises the step of aggregating small molecular weight sugar styrene monomers through a dispersion polymerization method. By means of the preparation method of the novel cement hydration and thermal control material, a high molecular compound can be obtained, the structure of the high molecular compound is neat, and each structural unit has a small molecular weight sugar structure; the reaction rate is high, the monomer conversion efficiency is high, and the molecular design capacity is high.

Description

Technical field: [0001] The invention relates to the field of concrete admixtures, in particular to a cement hydration heat regulating material and a preparation method thereof. Background technique: [0002] Cement will release a lot of heat during the hydration process. Due to the poor thermal conductivity of concrete, the heat will not be dissipated in time, and the temperature will rise in a short time, and the resulting temperature stress effect will lead to cracks in the concrete. Even cracking, affecting the durability and safety of concrete buildings. Therefore, in the process of concrete construction, especially in the process of mass concrete construction, it is necessary to reduce the hydration rate of cement in the concrete as much as possible, and reduce the temperature difference between the inside and outside of the concrete, thereby reducing the temperature rise. [0003] At present, most of the hydration heat control materials reported in the literature and...

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Problems solved by technology

[0003] Most of the heat of hydration regulating materials reported in literature and patents are starch or dextrin materials. Chinese patents CN103739722A and CN 104592403A respectively disclose two methods of using crosslinking agents to crosslink dextrin to obtain heat of hydration regulating materials; China Patents CN 104098288A and CN 105039461A disclose the method of obtaining dextrin by starch pyrolysis, acid hydrolysis or enzymatic hydrolysis or the method of further cross-linking to prepare hydration heat control materials; The link of the bond is on the polymer main chain, which expands the new field of hydration heat control materials, but because it mainly adds sugar molecules to the known polymer main chain through esterification, due to the molecular space Due to the problems of resistance effect and low esterification efficiency, it is impossible to add small molecular sugar units to each structural unit on the main chain of the polymer, which also limits the application of this method.

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