A kind of preparation method of concrete accelerator

A technology of early strength agent and concrete, which is applied in the field of preparation of concrete early strength agent, can solve the problems of large building corrosion and poor effect, and achieve the effect of harmless to human health, convenient and simple preparation, and easy operation

Inactive Publication Date: 2017-08-25
广东中澳高科新技术服务中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional early strength agent is more corrosive to the building, and the effect is extremely poor at low temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Get 700g of montmorillonite and put it into an oven for drying, then put it into a pulverizer and grind it into 70 meshes, put it in a container, add a 9% hydrochloric acid solution to it to submerge the particles for 5cm, stir for 15min, and set the temperature to 10°C, then let it stand for 8 minutes; add 100g of sodium chloride to the above solution, add ethanol to it to dissolve it completely, stop adding ethanol, set the temperature to 20°C, and then add 800g of 120 mesh calcium oxalate to it , stirred for 40 minutes, and filtered; put the obtained filtrate into a container, add sucrose solution with a mass fraction of 25%, 40g polyacrylamide, stir and heat for 1h, slowly heat to 50°C, and the heating rate is 2°C / min; after the above heating is completed, add 100g of triisopropanolamine to it, stir and cool down to 28°C, the cooling rate is 8°C / min, add 3g of copper sulfate to the container each time the temperature is lowered, stir evenly, and then filter; Mix th...

example 2

[0020] Take 900g of montmorillonite and put it into an oven for drying, then put it into a pulverizer and pulverize it into 90 meshes, put it into a container, add a 9% hydrochloric acid solution to it to submerge the particles for 7cm, stir for 20min, and set the temperature to 15°C, then let it stand for 12 minutes; add 150g of sodium chloride to the above solution, add ethanol to it to dissolve it completely, stop adding ethanol, set the temperature to 25°C, and then add 1000g of 140 mesh calcium oxalate to it , stirred for 50 minutes, and filtered; put the obtained filtrate into a container, add sucrose solution with a mass fraction of 25%, 50g polyacrylamide, stir and heat for 2h, slowly heat to 70°C, and the heating rate is 2°C / min; after the above heating is completed, add 110g of triisopropanolamine to it, stir and cool down to 35°C, and the cooling rate is 8°C / min, add 5g of copper sulfate to the container each time the temperature is lowered, stir evenly, and then fi...

example 3

[0022] Get 800g of montmorillonite and put it into an oven for drying, then put it into a pulverizer and grind it into 80 meshes, put it in a container, add a 9% hydrochloric acid solution to it to submerge the particles for 6cm, stir for 17min, and set the temperature to 12°C, then let it stand for 10 minutes; add 125g of sodium chloride to the above solution, add ethanol to it to dissolve it completely, stop adding ethanol, set the temperature to 22°C, and then add 900g of 130 mesh calcium oxalate to it , stirred for 450 minutes, and filtered; put the obtained filtrate into a container, add sucrose solution with a mass fraction of 25%, 45g polyacrylamide, stir and heat for 1h, slowly heat to 60°C, and the heating rate is 2°C / min; after the above heating is completed, add 105g of triisopropanolamine to it, stir and cool down to 30°C, and the cooling rate is 8°C / min, add 4g of copper sulfate to the container for each cooling, stir evenly, and then filter; Mix the obtained fil...

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PUM

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Abstract

The invention relates to a preparation method of a concrete early strength agent, belonging to the field of building materials. The present invention is aimed at that the traditional concrete early strength agent contains free chloride ions, which is relatively corrosive to buildings, affects human health, and has extremely poor effect at low temperature. In the treated montmorillonite powder, polyacrylamide, triisopropanolamine and copper sulfate are added to prepare a kind of free chloride ion, which has no corrosion to buildings, and the effect of early strength agent is not affected at low temperature. Affecting concrete early-strength agents. It is proved by examples that the present invention is convenient and simple to prepare, environmentally friendly and pollution-free, raw materials are readily available, easy to operate, the use effect is not affected by temperature, and it is harmless to human health, and within 4 days after use, the concrete strength is increased by more than 98%.

Description

technical field [0001] The invention relates to a preparation method of a concrete early strength agent, which belongs to the field of building materials. Background technique [0002] With the rapid development of the economy, the requirements for concrete are getting higher and higher. In order to meet the high standard requirements of construction. Now, concrete admixtures are constantly developing in the direction of high efficiency, multi-function and compounding. The use of admixtures can significantly improve various physical and chemical indicators of concrete. [0003] Concrete early strength agent is one of the concrete admixtures, and concrete early strength agent refers to the admixture that can improve the early strength of concrete and has no significant effect on the later strength. The main function of early strength agent is to accelerate the hydration speed of cement and promote the development of early strength in coagulation; the admixture with both ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C04B103/12
Inventor 林沃荣张辉坤冯显杭
Owner 广东中澳高科新技术服务中心有限公司
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