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A kind of c-s-h gel nano crystal nucleus early strengthening agent and its preparation method and application

A C-S-H, nanocrystalline technology, applied in the field of concrete admixtures, can solve problems such as poor gel stability

Active Publication Date: 2021-09-14
WUHAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0003] In view of this, the present invention aims to propose a C-S-H gel nano crystal nucleus early strength agent to solve the problem of poor gel stability of the existing nano C-S-H gel crystal nucleus early strength agent

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[0019] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0020] The C-S-H gel nano crystal nucleus early strength agent of the present invention, by weight, the C-S-H gel nano crystal nucleus early strength agent is mainly prepared from the following components through a wet grinding process: tricalcium silicate: 10-20 parts, Ion accelerator: 0.5-1 part, surface modifier: 0.1-0.3 part, dispersion stabilizer: 0.1-0.5 part, water: 78.5-89.2 part. Wherein, tricalcium silicate is a powder, and its median particle size is less than 100 microns; the ion solubilizing agent is a mixture of sodium carbonate and triisopropanolamine, and its mass ratio is 1:(5-10); the surface modifier is poly Sodium acrylate has a molecular weight of 3000-10000; the dispersion stabilizer is a slump-retaining polycarboxylate superplasticizer with a solid content of 35% to 45%, preferably 40%...

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Abstract

The invention provides a C-S-H gel nano crystal nucleus early strength agent and its preparation method and application, in parts by weight, the C-S-H gel nano crystal nucleus early strength agent is mainly composed of Prepared by wet grinding process: tricalcium silicate: 10-20 parts, ion accelerator: 0.5-1 parts, surface modifier: 0.1-0.3 parts, dispersion stabilizer: 0.1-0.5 parts, water: 78.5-89.2 parts . The C-S-H gel nano crystal nucleus early strengthening agent of the present invention utilizes the crystal nucleus induction effect of the nano-form C-S-H gel to accelerate the nucleation and growth of the hydration product in the early stage of hydration, which can improve the pores Structure and induced nucleation two aspects to achieve the purpose of early strength.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a C-S-H gel nano crystal nucleus early strength agent and its preparation method and application. Background technique [0002] Crystal nucleus early strength agent is a new type of early strength agent for cement concrete. Its early strength mechanism is based on the crystal nucleus effect, that is, specific nano-sized additives are mixed into cement and concrete, which can be used in the cement hydration process. Orientation induces the migration of various mineral ions, and provides nucleation centers for the growth of various hydration products or crystals, thereby accelerating the growth rate of hydration products and improving the degree of cement hydration. The preparation method of nano C-S-H gel crystal nucleus early strength agent is generally hydrothermal synthesis, the preparation process is cumbersome, the process conditions are strict, the process parame...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C04B103/12C04B22/08
CPCC04B40/0039C04B2103/12C04B22/00C04B22/10C04B24/122C04B24/2641C04B2103/302
Inventor 谭洪波邓秀峰张迅聂康峻李懋高贺行洋苏英
Owner WUHAN UNIV OF TECH
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