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Hot alkali activated mineral powder crystal nucleus early strength agent as well as preparation method and application thereof

A technology of early strength agent and mineral powder, which is applied in the field of hot alkali excited mineral powder crystal nucleus early strength agent and preparation field, can solve the problems of high preparation cost and long preparation time of calcium silicate crystal nucleus, and achieves the promotion of generation and preparation process. Simple, low-cost effects

Pending Publication Date: 2022-03-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a thermal alkali-activated ore powder crystal nucleus early strength agent and its preparation method and application, so as to solve the problem of high preparation cost and long preparation time of calcium silicate crystal nucleus in the prior art. question

Method used

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  • Hot alkali activated mineral powder crystal nucleus early strength agent as well as preparation method and application thereof
  • Hot alkali activated mineral powder crystal nucleus early strength agent as well as preparation method and application thereof
  • Hot alkali activated mineral powder crystal nucleus early strength agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 12.4g of sodium silicate and 49.6g of water, add to the reaction kettle to start stirring and heating, set the stirring rate to 300rpm and heat to the reaction temperature of 85°C, after the sodium silicate is completely dissolved, weigh 9.5g of mineral powder and Add it to the reaction kettle, keep the stirring rate and reaction temperature constant, and continue stirring for 5.0 hours to obtain the hot alkali-activated mineral powder crystal nucleus early strength agent.

Embodiment 2

[0032] Weigh 8.6g of sodium silicate and 28.4g of water, add them into the reaction kettle to start stirring and heating, set the stirring rate to 400rpm and heat to the reaction temperature of 70°C. After the sodium silicate is completely dissolved, weigh 8.6g of mineral powder and add it to the reaction kettle, keep the stirring rate and reaction temperature constant, and continue stirring for 6.0 hours to obtain the hot alkali-activated mineral powder crystal nucleus early strength agent.

Embodiment 3

[0034] Weigh 10.0 g of sodium hydroxide and 60.5 g of water, add them into the reaction kettle to start stirring and heating, set the stirring rate to 250 rpm and heat to the reaction temperature of 80°C. After the sodium silicate is completely dissolved, weigh 9.5g of mineral powder and add it to the reaction kettle, keep the stirring rate and reaction temperature constant, and continue stirring for 3.0 hours to obtain the hot alkali-activated mineral powder crystal nucleus early strength agent.

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Abstract

The invention discloses a hot alkali activated mineral powder crystal nucleus early strength agent as well as a preparation method and application thereof. The hot alkali activated mineral powder crystal nucleus early strength agent is prepared from the following components in parts by mass: 1-20 parts of alkali, 1-15 parts of mineral powder and 5-100 parts of water. The preparation method comprises the following steps: firstly, mixing the alkali and the water, heating to 60-100 DEG C while stirring, adding the mineral powder after the alkali is completely dissolved, keeping the temperature at 60-100 DEG C, and continuously stirring to react, thereby obtaining the hot alkali activated mineral powder crystal nucleus early strength agent after the reaction is finished. The prepared alkali-activated mineral powder crystal nucleus early strength agent is simple in preparation method and low in cost, alkali and mineral powder crystal nucleus contained in the early strength agent can achieve a synergistic effect, and the early strength of a cement-based material can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of organic synthesis, and in particular relates to a thermal alkali-activated ore powder crystal nucleus early strength agent, a preparation method and an application. Background technique [0002] Cement concrete is the most widely used synthetic material, and its composition includes cement, mineral admixtures, coarse aggregate, fine aggregate, water and admixtures. Mineral admixtures include fly ash, mineral powder and silica fume, etc. The purpose is to use these industrial solid wastes to replace part of the cement so as to reduce the amount of cement, which is conducive to energy saving and emission reduction. However, mineral admixtures have lower hydration activity than cement, and the early strength of concrete develops slowly after replacing part of cement. [0003] As we all know, the main hydration product of cement is calcium silicate hydrate gel, and its early strength is also provided by calcium silica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/00
CPCC04B22/00
Inventor 胡传林朱宏伟秦子豪麻智波黄兴杨陈卓刘蒸蒸王发洲
Owner WUHAN UNIV OF TECH
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