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A kind of nano cement-based crystal nucleus type early strength agent and its preparation method and application

A cement-based, early-strength agent technology, applied in the field of concrete admixtures, can solve problems such as poor compatibility between nano-based crystal nucleated early-strength agents and concrete, optimize cement stone pore structure, and reduce nucleation barriers. , the effect of increasing early strength

Active Publication Date: 2021-10-08
WUHAN UNIV OF TECH
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Problems solved by technology

[0005] In view of this, the present invention aims to propose a preparation method of nano cement-based crystal nucleus type early strength agent, to solve the problem of poor compatibility between existing nanometer crystal nucleus type early strength agent and concrete

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  • A kind of nano cement-based crystal nucleus type early strength agent and its preparation method and application
  • A kind of nano cement-based crystal nucleus type early strength agent and its preparation method and application

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Embodiment Construction

[0023] With the development of nanotechnology, it is found that in cement-based materials, the incorporation of nanomaterials can improve the early strength of concrete. However, nanoparticles are very easy to agglomerate, and if they cannot be well dispersed and compatible with concrete, the early strength cannot be effectively improved; at the same time, the cost of nanomaterials such as nano-silica, nano-calcium carbonate, and carbon nanotubes is high, which will seriously restrict its use. Promotion and application in the construction industry. Therefore, in order to enhance the compatibility between the early strength agent and concrete and reduce production costs, the present invention provides a nano-cement-based crystal nucleus type early-strength agent, which uses nano-scale cement to provide crystal nuclei for the hydration of cement-based materials. Induce its rapid hydration; the median particle size of the prepared nano-cement-based crystal nuclei is 50-100nm. Whe...

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Abstract

The invention provides a nano cement-based crystal nucleus type early strength agent and its preparation method and application. In parts by weight, the nano cement-based crystal nucleus type early strength agent is mainly prepared from the following components through a wet grinding process: cement : 20-35 parts, dispersant: 1-3 parts, retarder: 0.5-1 part, water: 64.5-79.5 parts. The nano-cement-based crystal nucleus type early strength agent of the present invention uses nano-scale cement to provide crystal nuclei for the hydration of cement-based materials to induce its rapid hydration; when mixed into cement-based materials, it can improve the pore structure and induce formation The core two aspects achieve the purpose of early strength; at the same time, no harmful ions are introduced, the compatibility with cement is good, and there will be no phenomena such as alkali-aggregate reaction and blooming.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a nano cement-based crystal nucleus type early strength agent and its preparation method and application. Background technique [0002] Concrete early strength agent is a very common concrete admixture, it can promote the early hydration of cement and improve the early strength of concrete. Now there is a great demand for early strength agent in the direction of precast concrete assembly structure. Traditional accelerators can be divided into three types according to their composition: organic type, inorganic type and compound type. There are still many problems in these early strength agents, such as easy to cause corrosion of steel bars, alkali-aggregate reaction or blooming. In addition, the new generation of accelerators provide crystal nucleus inducers for the early stage of cement hydration, which will reduce the nucleation barrier of early hydration products, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C04B103/10
CPCC04B40/0039C04B2103/10C04B7/02C04B24/163C04B24/06C04B24/10
Inventor 谭洪波张迅邓秀峰李懋高聂康峻贺行洋苏英
Owner WUHAN UNIV OF TECH
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