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Concrete segregation repairing agent and preparation method thereof

A concrete and repair agent technology, applied in the field of building materials, can solve the problems affecting the fluidity and strength of concrete, and achieve the effect of not affecting the pumping performance, good viscoelasticity, and good compatibility

Pending Publication Date: 2020-12-08
卫辉市东科新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing concrete segregation repairing agents contain air-entraining components and thickening components, which affect the fluidity and strength of concrete. Therefore, a concrete segregation repairing agent and its preparation method are needed to overcome the occurrence of the above problems

Method used

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  • Concrete segregation repairing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method for concrete segregation repairing agent, comprising the following steps:

[0019] Step 1. Mixing: Weigh 80 parts of deionized water, 19 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 parts of acrylic acid, 3 parts of fumaric acid, and 19 parts of acrylamide crystals, and put them into the reaction kettle in turn , stir evenly to obtain a mixture;

[0020] Step 2, neutralization: adding sodium hydroxide solution to the reaction kettle, neutralizing the mixture obtained in step 1 to a pH of 5.5 to 7.0 to obtain a neutralized product;

[0021] Step 3, Polymerization: Warm up the neutralized product obtained in Step 2 to 68-72°C, under the protection of nitrogen, add 0.05 parts of potassium persulfate solution prepared by potassium persulfate at one time, initiate polymerization, and obtain a polymerization product ;

[0022] Step 4. Cool down: when the temperature rises to 95-100°C, add 20 parts of deionized water to the polymerization produc...

Embodiment 2

[0025] A preparation method for concrete segregation repairing agent, comprising the following steps:

[0026] Step 1. Mixing: Weigh 90 parts of deionized water, 15 parts of 2-acrylamide-2-methylpropanesulfonic acid, 4 parts of acrylic acid, 2 parts of fumaric acid, and 17 parts of acrylamide crystals, and put them into the reaction kettle in turn , stir evenly to obtain a mixture;

[0027] Step 2, neutralization: adding sodium hydroxide solution to the reaction kettle, neutralizing the mixture obtained in step 1 to a pH of 5.5 to 7.0 to obtain a neutralized product;

[0028] Step 3, Polymerization: Warm up the neutralized product obtained in Step 2 to 68-72°C, under the protection of nitrogen, add 0.03 parts of potassium persulfate solution prepared by potassium persulfate at one time, initiate polymerization, and obtain a polymerization product ;

[0029] Step 4. Cool down: when the temperature rises to 95-100°C, add 20 parts of deionized water to the polymerization produc...

Embodiment 3

[0032] A preparation method for concrete segregation repairing agent, comprising the following steps:

[0033] Step 1. Mixing: Weigh 100 parts of deionized water, 11 parts of 2-acrylamide-2-methylpropanesulfonic acid, 3 parts of acrylic acid, 1 part of fumaric acid, and 16 parts of acrylamide crystals, and put them into the reaction kettle in turn , stir evenly to obtain a mixture;

[0034] Step 2, neutralization: adding sodium hydroxide solution to the reaction kettle, neutralizing the mixture obtained in step 1 to a pH of 5.5 to 7.0 to obtain a neutralized product;

[0035] Step 3, Polymerization: Warm up the neutralized product obtained in Step 2 to 68-72°C, under the protection of nitrogen, add 0.02 parts of potassium persulfate solution prepared by potassium persulfate at one time, initiate polymerization, and obtain a polymerization product ;

[0036] Step 4. Cool down: when the temperature rises to 95-100°C, add 20 parts of deionized water to the polymerization produc...

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Abstract

The embodiment of the invention relates to the technical field of building materials, in particular to a concrete segregation repairing agent and a preparation method thereof. The concrete segregationrepairing agent is prepared from the following components in parts by weight: 10-20 parts of 2-acrylamide-2-methyl propanesulfonic acid, 3-5 parts of acrylic acid, 1-3 parts of fumaric acid, 10-20 parts of acrylamide crystals, 100-120 parts of deionized water and 0.01-0.05 part of potassium persulfate. The beneficial effects are that the concrete segregation repairing agent is formed by polymerization of a high-molecular biopolymer, and the production and use processes are green and pollution-free; acid and alkali resistance is high, compatibility is high, and compatibility is good; the repairing agent does not contain an air entraining component and a thickening component; an aqueous solution of the repairing agent has good viscosity and consistency; when applied to the concrete, the repairing agent can make the concrete have good viscoelasticity, plasticity and toughness, and the phenomena of cracking, hollowing, bubbling, peeling and the like of the concrete can be effectively improved; and bleeding and segregation of the concrete are effectively repaired, so that the concrete structure is more uniform, the pumping performance is not influenced, and the strength of the concreteis not influenced.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a concrete segregation repairing agent and a preparation method thereof. Background technique [0002] Concrete is one of the most important civil engineering materials today. It is composed of cementitious materials, granular aggregates (also known as aggregates), water, and if necessary, admixtures and admixtures prepared in a certain proportion, uniformly stirred, densely formed, cured and hardened. artificial stone. Concrete has the characteristics of rich raw materials, low price and simple production process, so its consumption is increasing. At the same time, concrete also has the characteristics of high compressive strength, good durability, and a wide range of strength grades. These characteristics make it widely used, not only in various civil engineering, but also in shipbuilding, machinery industry, marine development, geothermal engineering, etc. Concre...

Claims

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Application Information

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IPC IPC(8): C08F220/58C08F220/56C08F220/06C08F222/02C04B24/16
CPCC08F220/585C08F220/56C04B24/163C04B2103/0082C08F220/06C08F222/02
Inventor 李沛龙杨付增李璐宇
Owner 卫辉市东科新型材料有限公司
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