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Preparation method of concrete early strength agent

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

Inactive Publication Date: 2015-12-23
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] Take 700g of montmorillonite and put it in an oven for drying, then put it in a pulverizer and pulverize it to 70 mesh, put it into a container, add a 90% hydrochloric acid solution to grind the particles for 5cm, stir for 15min, and set the temperature to 10℃, then stand for 8min; add 100g of sodium chloride to the above solution, add ethanol to it to make it completely dissolved, stop adding ethanol, set the temperature to 20℃, and then add 800g of 120 mesh calcium oxalate to it , Stir for 40 minutes, filter; put the obtained filter into a container, add 25% mass fraction of sucrose solution, 40g polyacrylamide, stir and heat for 1h, slowly heat to 50 ℃, the heating rate is 2 ℃ / min; After the above heating is over, add 100g of triisopropanolamine to it, stir and cool to 28°C at a rate of 8°C / min, add 3g of copper sulfate to the container each time the temperature is lowered, stir well, and then filter; The obtained filter material is mixed with 10g sodium alkylbenzene...

example 2

[0021] Take 900g montmorillonite and put it in an oven for drying, then put it in a pulverizer and pulverize it into 90 meshes, put it into a container, add a 90% hydrochloric acid solution to grind the particles 7cm, stir for 20min, and set the temperature to 15℃, then stand for 12min; add 150g of sodium chloride to the above solution, add ethanol to it to make it completely dissolve, stop adding ethanol, set the temperature to 25℃, and then add 1000g of 140 mesh calcium oxalate to it , Stir for 50 minutes, and filter; put the obtained filter into a container, add 25% mass fraction of sucrose solution, 50g polyacrylamide, stir and heat for 2h, slowly heat to 70℃, the heating rate is 2℃ / min; After the above heating is over, add 110g of triisopropanolamine to it, stir and cool 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 filter; The obtained filter material is mixed with 15g sodiu...

example 3

[0024] Take 800g montmorillonite and put it in an oven for drying, then put it in a pulverizer and pulverize it to 80 mesh, put it in a container, add a 90% hydrochloric acid solution to grind the particles for 6cm, stir for 17min, and set the temperature to 12℃, then stand for 10min; add 125g of sodium chloride to the above solution, add ethanol to it to make it completely dissolve, stop adding ethanol, set the temperature to 22℃, then add 900g of 130 mesh calcium oxalate to it , Stir for 450 minutes, and filter; put the obtained filter into a container, add 25% sucrose solution, 45g polyacrylamide to it, stir and heat for 1h, slowly heat to 60℃, and the temperature rise rate is 2℃ / min; After the above heating is over, add 105g of triisopropanolamine to it, stir and cool to 30°C, the cooling rate is 8°C / min, add 4g of copper sulfate to the container each time the temperature is lowered, stir evenly, and then filter; The obtained filter material is mixed with 12g sodium alkyl ...

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PUM

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Abstract

The invention relates to a preparation method of a concrete early strength agent, and belongs to the field of building materials. Aiming at the disadvantages that the traditional concrete early strength agent contains free chloride ions, is high in corrosion to buildings and affects human health and poor in effect at low temperature, non-free chloride ions are prepared by crushing montmorillonite, performing acid treatment, adding calcium oxalate to be adhered to treated montmorillonite powder and then adding polyacrylamide, triisopropanolamine and copper sulfate, and the concrete early strength agent is non-corrosive to buildings, and the effect of which is not affected in low-temperature condition. Experiments show that the preparation method is convenient and simple in preparation, and environmentally friendly and pollution-free, raw materials are easy to get, the method is convenient for operation, the use effect is not affected by temperature, the method is harmless for human health, and the concrete strength is improved by more than 98 percent within four days after the concrete early strength agent is used.

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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IPC IPC(8): C04B24/26C04B103/12
Inventor 李锦宇宋国
Owner 广东中澳高科新技术服务中心有限公司
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