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Compatibility improving agent and its preparation method and use

A compatibility and improving agent technology, applied in the field of chemical building materials, can solve the problems of large loss over time, high methylene blue adsorption value, poor compatibility of water reducing agent with cement and concrete, etc., and achieve low cost of use Effect

Active Publication Date: 2018-02-16
眉山海螺新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production of cement and concrete, auxiliary cementitious materials such as fly ash, slag powder, limestone powder, natural pozzolan, silica fume, and phosphorus slag powder are usually added to improve the performance of cement and concrete and reduce production costs. The high adsorption value of formazan blue makes the compatibility of water reducing agent with cement and concrete poor, resulting in excessive dosage of water reducing agent and excessive loss over time, which brings difficulties to engineering construction
[0003] In order to solve the above-mentioned compatibility problem, the inventor of the present invention provides a compatibility improving agent, which is used to improve the compatibility of water reducing agent with cement and concrete

Method used

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  • Compatibility improving agent and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 200g of ethylene glycol, 300g of glycerol and 5g of sodium hydroxide into a 1L glass stirred tank, turn on the vacuum pump to evacuate the reactor to a vacuum of -0.09MPa and maintain the vacuum. The temperature was raised to 200°C, and the water generated by the reaction was collected into the receiver through the condenser, and dehydrated for 6 hours. After the reaction was completed, the compatibility improving agent 1 was obtained, and the detected molecular weight was 2347 Daltons.

Embodiment 2

[0023] Add 100g of propylene glycol, 300g of monoethanol diisopropanolamine, 100g of tetrahydroxypropyl ethylenediamine and 5g of sodium hydroxide into a 1L glass stirred tank, turn on the vacuum pump to evacuate the reactor to a vacuum of -0.09MPa and maintain the vacuum Spend. The temperature was raised to 210°C, and the water generated by the reaction was collected into the receiver through the condenser, and dehydrated for 3 hours. After the reaction was completed, the compatibility improving agent 2 was obtained, and the detected molecular weight was 5504 Daltons.

Embodiment 3

[0025] Add 200g of diethanolamine, 250g of diethanol monoisopropanolamine, 50g of sorbitol and 5g of sodium hydroxide into a 1L glass stirred tank, turn on the vacuum pump to evacuate the reactor to a vacuum of -0.09MPa and maintain the vacuum. The temperature was raised to 200°C, and the water generated by the reaction was collected into the receiver through a condenser, and dehydrated for 4 hours. After the reaction was completed, the compatibility improving agent 3 was obtained, and the detected molecular weight was 3175 Daltons.

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Abstract

The present invention belongs to the field of chemical building materials, in particular to a compatibility improving agent and preparation method and application thereof. The compatibility improving agent can be used as a cement grinding aid and a concrete water reducer. The invention solves the technical problem by providing a novel preparation method of the compatibility improving agent. The method has the advantages of low ash, low cost, and simple production. The preparation method of the compatibility improving agent comprises the steps of: A, adding a hydroxyl group mixture and a catalyst to a reactor, controlling the degree of vacuum at -0.085 to -0.095MPa, heating to 150-230 DEG C; and B, conducting a dehydration reaction for 3-8 h to obtain a compatibility improving agent with alcohol ether polymer as the main component. The compatibility improving agent provided by the present invention significantly improves the compatibility of water reducing agent with cement and concrete, does not affect the strength development of concrete, can promote application of supplementary cementitious materials in cement and concrete, is conducive to the energy conservation and emission reduction in the construction industry, and has good market prospects.

Description

technical field [0001] The invention belongs to the field of chemical building materials, and in particular relates to a compatibility improving agent and its preparation method and application. The compatibility improving agent can be used as a cement grinding aid and a concrete water reducer. Background technique [0002] In the production of cement and concrete, auxiliary cementitious materials such as fly ash, slag powder, limestone powder, natural pozzolan, silica fume, and phosphorus slag powder are usually added to improve the performance of cement and concrete and reduce production costs. The high adsorption value of formazan blue makes the compatibility of water reducing agent with cement and concrete poor, resulting in excessive dosage of water reducing agent and excessive loss over time, which brings difficulties to engineering construction. [0003] In order to solve the above-mentioned compatibility problem, the inventors of the present invention provide a compa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/34C04B24/32C04B103/52C04B103/30
CPCC04B24/32C04B2103/302C04B2103/52C08G65/34C08G2650/52
Inventor 曾君张大康吴建越张超刘水华李健吴小波陈军
Owner 眉山海螺新材料科技有限公司