A kind of high-efficiency self-compensating hydration heat regulator and preparation method and application thereof

Abstract

The invention discloses a high-efficiency self-compensating hydration heat regulator, which, in parts by mass, comprises the following components: 70-85 parts of starch, 10-15 parts of phase change material, and 3-5 parts of amylase; a preparation method, the steps of which are As follows: S100: add hydrogen peroxide, starch, sodium hydroxide diluent, water, borax solution in sequence to the reactor, stir, and cold gelatinize starch; S200: mix the phase change material and amylase evenly, and add it to the paste The starch is mixed evenly; S300: the mixture obtained in step S200 is vacuum-cooled and dried to obtain a high-efficiency self-compensating hydration heat regulator. The application of the high-efficiency self-compensating hydration heat regulator in the regulation of hydrothermalization, the mixing amount thereof is 1% to 5% of the total amount of the externally mixed rubber material. It can respond quickly and play its regulating function in the position where the temperature is too high, and continuously control the hydration temperature, effectively prevent the generation of temperature stress, and improve the mechanical properties and durability of concrete.

Description

technical field [0001] The invention relates to the field of building material functional additives, in particular to an efficient self-compensating hydration heat regulator and a preparation method and application thereof. Background technique [0002] With the continuous advancement of infrastructure construction in my country, the demand for concrete strength and durability is also increasing. Concrete is composed of cementitious materials, aggregates, admixtures and water. The key to strength requirements is to reduce the water-binder ratio. The glue ratio will cause the cement hydration rate to speed up, generate a lot of heat in a short time, and the internal temperature of the concrete will rise sharply. Due to the poor thermal conductivity of concrete, the internal heat cannot be released, and the external heat dissipation is fast, which is prone to thermal stress cracks, destroying the integrity of the concrete structure, and seriously affecting the strength and dura...

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Problems solved by technology

[0004] Patent CN106008771B discloses a cement hydration heat control material and its preparation method. A polymer compound with a small molecular sugar structure is obtained by polymerizing a small molecular sugar styrene monomer. Although glycogen molecules are introduced, each in the concrete structure The temperature of the location is different, and the location and time of the cracks are also different. The introduction of glycogen in a single deposit will reduce the hydration process of the entire system and affect the progress of the project.

[0005] Patent CN105271912A discloses a preparation method of a starch-based cement hydration heat control material. After mixing dextrin, starch, and dibasic acid anhydride, it is melted and extruded. The material is easy to agglomerate during the melting process, and it is lumpy when added to concrete, especially After being mixed with mixing water, it cannot be fully released to play a regulating role, and the cleavage of its massive aggregates will also affect the strength of concrete

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