Coal ash activity exciting agent and preparing method of coal ash activity exciting agent

An active activator, fly ash technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of high cost, affecting the quality of concrete and other materials, corrosion of steel bars by chloride salts, etc. Unsaturated bonds, the effect of promoting pozzolanic reaction

Active Publication Date: 2014-09-24
SHANDONG HONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the above-mentioned activators have a certain stimulating effect on the activity of fly ash, the dosage of these fly ash active activators is generally large, the cost is h...

Method used

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  • Coal ash activity exciting agent and preparing method of coal ash activity exciting agent
  • Coal ash activity exciting agent and preparing method of coal ash activity exciting agent

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preparation example Construction

[0034] Correspondingly, the present invention provides a kind of preparation method of above-mentioned fly ash activity stimulating agent, comprises the following steps:

[0035] Sodium p-aminobenzenesulfonate, water, lye, acetone, urea and formaldehyde solution are mixed and then reacted to obtain a fly ash active activator.

[0036] The invention provides a preparation technology of a fly ash activity activator. The prepared activator has high activation activity and low dosage, can not only effectively stimulate the activity of fly ash, but also improve the performance of concrete and the like. Moreover, the activator is a synthetic polymer product with uniform and stable quality.

[0037] In the embodiment of the present invention, add sodium p-aminobenzenesulfonate, water, lye, acetone, urea and formaldehyde solution into a reaction kettle, and react after mixing to obtain a fly ash activity activator.

[0038] Preferably, the preparation method specifically includes the...

Embodiment 1

[0061] Get 30g of sodium sulfanilate and 80g of water into the reaction flask, start stirring, after the sodium sulfanil is completely dissolved, add a sodium hydroxide solution with a mass concentration of 30%, adjust the pH value to 12, and obtain a mixed solution; the mixed solution was warmed up to 50°C, 20g of acetone and 10g of urea were added thereto, continued to stir, and reacted at a constant temperature for 0.5h to obtain a reaction solution; the reaction solution was warmed up to 75°C, and 80g of mass was added dropwise The formaldehyde solution with a concentration of 37% was added dropwise within 2 hours by controlling the rate of addition; finally, the temperature was raised to 90°C, and the reaction was continued for 3 hours, and the temperature was lowered to discharge the material to obtain a brownish-red transparent liquid product, that is, the fly ash active activator.

[0062] The number-average molecular weight of the fly ash activator is 5000, the viscosi...

Embodiment 2

[0069] Get 40g of sodium sulfanilate and 90g of water into the reaction flask, start stirring, and after the sodium sulfanil is completely dissolved, add a sodium hydroxide solution with a mass concentration of 30%, adjust the pH value to 12, and obtain a mixed solution; the mixed solution was heated up to 50°C, 25g of acetone and 10g of urea were added thereto, continued to stir, and reacted at a constant temperature for 1.0h to obtain a reaction solution; the reaction solution was raised to 75°C, and 90g of mass was started to be added dropwise The formaldehyde solution with a concentration of 37% was added dropwise within 2 hours by controlling the rate of addition; finally, the temperature was raised to 90°C, and the reaction was continued for 3 hours, and the temperature was lowered to discharge the material to obtain a brownish-red transparent liquid product, that is, the fly ash active activator.

[0070] The number average molecular weight of the fly ash activator is 76...

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Abstract

The invention provides a coal ash activity exciting agent and a preparing method of the coal ash activity exciting agent. The preparing method includes the step that sodium sulfanilate, water, alkali liquor, acetone, urea and a formaldehyde solution are mixed to react to obtain the coal ash activity exciting agent, wherein the coal ash activity exciting agent has repeated units shown in the first formula (please see the specifications for the formula), and the number-average molecular weight ranges from 5000 to 20000. The coal ash activity exciting agent structurally comprises N bonds with lone pair electrons and C=O double bonds with lone pair electrons, active SiO2 and active Al2O3 in coal ash can be excited to react with calcium ions obtained by ionizing Ca(OH)2, and hydration products, such as hydration calcium silicate and hydration calcium aluminate, of space network structures are generated; in addition, a large amount of hydroxy is contained in molecules of the coal ash activity exciting agent, after the coal ash activity exciting agent is dissolved into water, OH- is obtained through ionizing, the surfaces of vitreous bodies of the coal ash can be corroded, the surface structure of the coal ash is broken up, unsaturated bonds of the coal ash are increased, the pozzolanic reaction is prompted, and the activity of the coal ash can be effectively excited under the condition that the doped amount is small.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a fly ash active activator and a preparation method thereof. Background technique [0002] Fly ash is a fine ash that can be collected from the flue gas after coal combustion. It is a potentially active pozzolanic powder that can be used as an admixture for building materials such as cement and concrete. It can improve material properties and reduce cost etc. The composition of fly ash includes active components and smooth and hard vitreous body, etc., among which, the existence of glass body will hinder the hydration of active components, resulting in low activity of fly ash in the early stage of use, affecting its performance in cement and concrete. dosage. [0003] In order to increase the content of fly ash in cement and concrete, its potential activity must be stimulated. There are three main ways to stimulate the activity of fly ash: one is physical activation...

Claims

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Application Information

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IPC IPC(8): C04B18/08C08G16/04
CPCY02W30/91
Inventor 宋南京侯涛赵贵亮朱化雨赵洪义
Owner SHANDONG HONGYI TECH
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