Novel cement hydration and thermal control material and preparation method thereof

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 novel 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 dissipate in time, and the temperature will rise in a short period of time. The resulting temperature stress effect will cause cracks in the concrete. Even cracking affects 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, reduce the temperature difference between the inside and outside of the concrete, and thereby reduce the temperature rise. [0003] At present, most of the hydration heat regulating materials reported in literature and...

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Problems solved by technology

[0003] At present, most of the hydration heat regulating materials reported in literature and patents are starch or dextrin-based materials. Chinese patents CN 103739722A and CN 104592403A respectively disclose two methods of using crosslinking agents to crosslink dextrin to obtain hydration heat regulating materials; Chinese 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 obtain hydration heat control materials; The link of the ester bond on the main chain of the polymer expands the new field of hydration heat control materials, but because it mainly adds sugar molecules to the main chain of the known polymer through esterification, due to the molecular space The problems of steric hindrance effect and low esterification efficiency make it 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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