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A kind of water-based cement hydration rate control material and preparation method thereof

A cement hydration and rate technology, applied in the field of concrete admixtures, can solve the problems of weakening the peak value of hydration heat release rate and prolonging the induction period, so as to facilitate transportation and construction, reduce the probability of temperature cracks, and reduce temperature. peak effect

Active Publication Date: 2021-11-09
ZHENJIANG SOBUTE NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sugars mainly prolong the induction period of cement hydration, but have little effect on the acceleration or deceleration period of cement hydration, so they have no effect on weakening the peak value of hydration heat release rate

Method used

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  • A kind of water-based cement hydration rate control material and preparation method thereof
  • A kind of water-based cement hydration rate control material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation of the water-based cement hydration rate control material includes the following steps: add 100g glucose (0.56mol) and 200g ethylenediamine (3.3mol) to 600ml water to obtain a 33wt% solution, add phosphoric acid, and heat up to 50°C for 2h , the product of water-based cement hydration rate control material can be obtained.

Embodiment 2

[0031] The preparation of the water-based cement hydration rate control material comprises the following steps: add 100g fructose (0.56mol) and 100g decylamine (0.63mol) to 600ml water to obtain a 25wt% solution, add lactic acid, heat up to 40°C for 4h, The water-based cement hydration rate control material product can be obtained.

Embodiment 3

[0033] The preparation of the water-based cement hydration rate control material comprises the following steps: adding 100g galactose (0.56mol) and 300g decanediamine (1.74mol) to 400ml water to obtain a 50wt% solution, adding citric acid, and heating to 60 ℃ for 3 hours, the water-based cement hydration rate control material product can be obtained.

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Abstract

The invention provides a water-based cement hydration rate control material and a preparation method thereof. The water-based cement hydration rate control material in the invention is derived from the reaction between the aldehyde group of the reducing sugar and the amino group of the amino reactant. Its preparation method is a simple aqueous solution reaction method. The aqueous solution obtained by this method has a good control effect on the cement hydration rate without affecting the final total heat release of cement, so that the cement hydration heat release is more stable. , at the same time, the preparation process is simple, the drying of solid finished products and the use of organic solvents are reduced, and the theme of green chemistry is met.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, in particular to an aqua cement hydration rate control material and a preparation method thereof. Background technique [0002] Cement hydration will release a lot of heat. When the cement hydration rate in concrete is not controlled, it will release a lot of heat in a short period of time. If the heat cannot be dissipated in time, the temperature of the concrete center will rise sharply, causing a huge temperature difference between the inside and outside of the concrete member, causing the volume of the concrete to change. When the concrete is under restrained conditions, when the tensile stress due to temperature deformation exceeds the tensile strength of the concrete, temperature cracks will occur, which will cause great harm to the durability and safety of the project. [0003] In order to reduce the generation of temperature cracks, in addition to improving the heat dissipation efficien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12C04B28/02
CPCC04B28/02C04B40/0039C04B2201/50C04B24/10C04B24/121C04B22/165C04B24/06C04B18/08C04B14/06C04B14/02
Inventor 储阳王瑞王文彬王育江穆松
Owner ZHENJIANG SOBUTE NEW MATERIAL CO LTD