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Method for preparing high-strength frost-resistant concrete

A concrete and high-strength technology, which is applied in the field of preparation of high-strength frost-resistant concrete, can solve problems affecting the long-term use and safe operation of buildings, slow strength development, concrete damage, etc., to inhibit the generation of harmful cracks and reduce bleeding and shrinkage value, the effect of lowering the freezing point of the liquid phase

Inactive Publication Date: 2017-12-01
新沂市中诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concrete freeze-thaw damage is one of the main problems of building aging diseases in my country, which seriously affects the long-term use and safe operation of buildings. An important problem of concrete construction at negative or low temperatures is that the strength develops very slowly, and negative temperatures can cause The phase change of water causes the volume to expand, so that the concrete suffers extremely serious damage.

Method used

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  • Method for preparing high-strength frost-resistant concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of high-strength frost-resistant concrete is characterized in that the method comprises the following steps:

[0026] Add 300 parts of cement, 60 parts of quicklime, 600 parts of aggregate, 2.5 parts of activator and 5.8 parts of amphoteric dispersant into 300 parts of water, stir and mix evenly, control the dispersion degree of the slurry at 18cm, the temperature at 45°C, and the stirring speed 650r / min;

[0027] The material obtained in the above steps is poured, and after pouring, it is sent to a static chamber with a temperature of 50°C and a humidity of 60°C for thickening for 3 hours;

[0028] After thickening, the material is demolded and cut to obtain the green body of the required specification and size, and then the green body is

[0029] Send it to the autoclave for steam curing for 2 hours. After leaving the autoclave, it will be naturally cured for one week to obtain the final high-strength frost-resistant concrete.

[0030] Wherein t...

Embodiment 2

[0044] Add 300 parts of cement, 60 parts of quicklime, 600 parts of aggregate, 1 part of activator and 8 parts of amphoteric dispersant into 300 parts of water, stir and mix well, control the dispersion degree of the slurry at 18 cm, the temperature at 45 °C, and the stirring speed 650r / min;

[0045] The material obtained in the above steps is poured, and after pouring, it is sent to a static chamber with a temperature of 50°C and a humidity of 60°C for thickening for 3 hours;

[0046]After the thickening is completed, the material is demoulded and cut to obtain the green body of the required specification and size, and then the green body is sent to the autoclave for steam curing for 2 hours. After leaving the autoclave, it is naturally cured for a week to obtain the final high-strength antifreeze concrete;

[0047] All the other preparations are the same as in Example 1.

Embodiment 3

[0049] Add 400 parts of cement, 10 parts of quicklime, 500 parts of aggregate, 2.5 parts of activator and 5.8 parts of amphoteric dispersant into 300 parts of water, stir and mix evenly, control the dispersion degree of the slurry at 18cm, the temperature at 45°C, and the stirring speed 650r / min;

[0050] The material obtained in the above steps is poured, and after pouring, it is sent to a static chamber with a temperature of 50°C and a humidity of 60°C for thickening for 3 hours;

[0051] After the thickening is completed, the material is demoulded and cut to obtain the green body of the required specification and size, and then the green body is sent to the autoclave for steam curing for 2 hours. After leaving the autoclave, it is naturally cured for a week to obtain the final high-strength antifreeze concrete;

[0052] All the other preparations are the same as in Example 1.

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Abstract

The invention discloses a method for preparing high-strength frost-resistant concrete. The high-strength frost-resistant concrete is prepared by using acrylic acid, mercapto acetic acid, acryloyloxyethyl trimethyl ammonium chloride, ascorbic acid,allyl polyethenoxy ether, ammonium persulphate, maleic anhydride, allyl polyethylene glycol, sodium p-toluenesulfonate, methyl methacrylate, sodium methylallyl sulfonate and acrylamide, performing hydrogen peroxide alkaline treatment and doping an amphoteric dispersant and an activating agent in HZSM-5 / bentonite nano-material. The frost-resistant concrete prepared from the amphoteric dispersant and activating agent doped HZSM-5 / bentonite compound nano-material has the advantages of easily available preparation materials, low cost, strong frost resistance, good stability and long service life.

Description

technical field [0001] The invention relates to a preparation method of high-strength frost-resistant concrete, which belongs to the field of concrete manufacture. Background technique [0002] The frost resistance durability of concrete has aroused the interest of scholars at home and abroad, not only because it is a very important factor affecting the service life and service quality of concrete, but also because of the wide range of frost damage in concrete. Our country has a vast territory, and a considerable part is in the severe cold zone, and many buildings have been damaged by freezing and thawing. Concrete freeze-thaw damage is one of the main problems of building aging diseases in my country, which seriously affects the long-term use and safe operation of buildings. An important problem of concrete construction at negative or low temperatures is that the strength develops very slowly, and negative temperatures can cause The phase change of water makes the volume ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/32C04B24/26
CPCC04B28/00C04B40/0039C04B2201/50C04B2201/52C04B24/04C04B24/12C04B24/00C04B24/32C04B22/14C04B24/02C04B22/10C04B22/062C04B24/26C04B24/20C04B24/16C04B24/124C04B14/02C04B22/064
Inventor 赵蕊
Owner 新沂市中诺新材料科技有限公司
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