A kind of preparation method and product thereof of anti-segregation agent for concrete

An anti-segregation agent and concrete technology, which is applied in the field of concrete admixtures, can solve problems such as segregation, and achieve the effects of simple production process, large water absorption effect, and enlarged volume capacity.

Active Publication Date: 2022-03-29
四川鼎德商品混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the inventor found in the process of using the polyacrylamide anti-segregation agent that after adding the anti-segregation agent to the concrete mixture, in the process of pouring the building, it was found that in the poured building materials, there would still be Segregation occurs

Method used

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  • A kind of preparation method and product thereof of anti-segregation agent for concrete
  • A kind of preparation method and product thereof of anti-segregation agent for concrete
  • A kind of preparation method and product thereof of anti-segregation agent for concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] An anti-segregation agent for concrete is prepared through the following steps:

[0050] Step 1: Put 46 parts of acrylamide, 6 parts of acrylic acid and 100 parts of water into the reaction kettle, and stir at room temperature until the acrylamide is completely dissolved for 20 minutes to form a mixed solution A;

[0051] Step 2: Heat the mixed solution A obtained in Step 1, the temperature is controlled at 85° C., and the holding time is 3 hours. In the mixed solution A, acrylamide and acrylic acid are copolymerized, and acrylamide is homopolymerized to form a mixed solution B;

[0052] Step 3: Cool down the mixed solution B, control the temperature at 50° C., slowly add 20 wt % sodium hydroxide aqueous solution dropwise, adjust the pH value to 7.8, and form mixed solution C;

[0053] Step 4: Add 48 parts of sodium p-styrene sulfonate to the mixed solution C obtained in step 3, control the temperature at 50° C., add water while stirring to dissolve the sodium p-styrene...

Embodiment 2

[0057] An anti-segregation agent for concrete is prepared through the following steps:

[0058] Step 1: Put 44 parts of acrylamide, 10 parts of acrylic acid and 100 parts of water into the reaction kettle, and stir at room temperature until the acrylamide is completely dissolved for 20 minutes to form a mixed solution A;

[0059] Step 2: Heat the mixed solution A obtained in Step 1, the temperature is controlled at 90° C., and the holding time is 3 hours. In the mixed solution A, acrylamide and acrylic acid are copolymerized, and acrylamide is homopolymerized to form a mixed solution B;

[0060] Step 3: Cool down the mixed solution B, control the temperature at 55° C., slowly add 20 wt % sodium hydroxide aqueous solution dropwise, adjust the pH value to 8.2, and form mixed solution C;

[0061] Step 4: Add 46 parts of sodium p-styrene sulfonate to the mixed solution C obtained in step 3, control the temperature at 55° C., add water while stirring to dissolve the sodium p-styren...

Embodiment 3

[0065] An anti-segregation agent for concrete is prepared through the following steps:

[0066] Step 1: Put 40 parts of acrylamide, 12 parts of acrylic acid and 100 parts of water into the reaction kettle, and stir at room temperature until the acrylamide is completely dissolved for 20 minutes to form a mixed solution A;

[0067] Step 2: Heating the mixed solution A obtained in Step 1, the temperature is controlled at 95° C., and the holding time is 3 hours. In the mixed solution A, acrylamide and acrylic acid are copolymerized, and acrylamide is homopolymerized to form a mixed solution B;

[0068] Step 3: Cool down the mixed solution B, control the temperature at 60°C, slowly add 28%wt ammonia solution dropwise, adjust the pH value to 9.5, and form the mixed solution C;

[0069] Step 4: Add 42 parts of sodium dodecylbenzene sulfonate to the mixed solution C obtained in step 3, control the temperature at 60°C, add water while stirring to dissolve the sodium dodecylbenzene sulf...

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Abstract

The application relates to the field of admixtures for concrete, and specifically discloses a preparation method of an anti-segregation agent for concrete and a product thereof. Its preparation method is: dissolving acrylamide in acrylic acid aqueous solution, heating and copolymerizing, adjusting the pH value to weak alkalinity, and then introducing aromatic hydrocarbon sulfonate for reaction to finally obtain the anti-segregation agent of the application. The anti-segregation agent of the present application has good hydrophilicity and certain thickening performance, which can enhance the cohesion between the components in the concrete and reduce the bleeding rate of the concrete. Furthermore, due to the electric repulsion and The combined effect of steric hindrance enables the prepared anti-segregation agent to be fully dispersed in concrete, giving full play to the effect of the anti-segregation agent of this application, and adding the anti-segregation agent to concrete to enhance the cohesion between concrete mixtures properties, reduce the bleeding rate, and improve the segregation resistance of cement; in addition, the preparation method of the present application has a simple production process and is easy for industrial production.

Description

technical field [0001] The application relates to the field of admixtures for concrete, more specifically, it relates to a preparation method of an anti-segregation agent for concrete and a product thereof. Background technique [0002] Concrete is one of the most important civil engineering materials in the contemporary era. Cement is used as cementitious material, sand and stone are used as aggregate; it is mixed with water (may contain admixtures and admixtures) in a certain proportion, and the cement concrete obtained by mixing . Because concrete has the characteristics of abundant raw materials, low price and simple production process, 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 engineer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C08F8/36C08F220/56C08F220/06
CPCC04B40/0039C08F8/36C08F220/56C08F220/06C04B18/08C04B24/163
Inventor 徐东熊恩贵
Owner 四川鼎德商品混凝土有限公司
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