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A kind of segregation bleeding inhibitor for cement concrete and preparation method thereof

A technology of cement concrete and inhibitor, which is applied in the field of cement concrete admixtures in building materials, can solve problems such as poor workability, and achieve the effects of improving work performance and durability, good benefits, and improved workability

Active Publication Date: 2017-12-05
山东江泰建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem of poor workability caused by the poor quality of concrete raw materials in the mixing process, the purpose of the present invention is to provide a segregation bleeding inhibitor for cement concrete, so that it can effectively meet the technical performance requirements of high-performance concrete structures and modern construction technology

Method used

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  • A kind of segregation bleeding inhibitor for cement concrete and preparation method thereof
  • A kind of segregation bleeding inhibitor for cement concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the segregation bleeding inhibitor for cement concrete of the present invention, the steps are:

[0028] (1) In parts by weight (unit: gram), take respectively 0.05 parts of initiator ammonium persulfate, 5 parts of alkali, 18 parts of acrylic acid, and 40 parts of water, and add them together to a tank equipped with a thermometer, a stirrer and a dropping device. In a four-neck flask, stir evenly;

[0029] (2) In parts by weight (unit: gram), take concentration respectively and be 1.4 parts of 5% hydrogen peroxide as oxidant, 1.0 part of reducing agent vitamin C and 0.006 part of chain transfer agent mercaptopropionic acid, add dropwise to step (1) ) in the prepared solution, control the reaction for 1.2 hours to obtain a solution that generates sodium polyacrylate with large molecular weight;

[0030] (3) In parts by weight (unit: gram), respectively weigh 5 parts of acrylic acid, 4 parts of acrylamide, and 23 parts of water, and then add th...

Embodiment 2

[0038] (1) In parts by weight (unit: gram), weigh 0.05 parts of initiator sodium bisulfite, 5 parts of alkali, 18 parts of acrylic acid, and 40 parts of water, and add them together to the In a four-neck flask, stir evenly;

[0039] (2) In parts by weight (unit: gram), take 1.6 parts of potassium permanganate as an oxidizing agent, 1.2 parts of reducing agent vitamin C and 0.008 part of chain transfer agent mercaptopropionic acid, and add them dropwise to step (1) In the prepared solution, the reaction was controlled for 1.5 hours to obtain a solution that generated sodium polyacrylate with large molecular weight;

[0040] (3) In parts by weight (unit: gram), weigh 5 parts of acrylic acid, 5 parts of acrylamide, and 23 parts of water, and then add them together to the solution prepared in step (2), and continue to react for 5 hours. Let stand for 1 hour;

[0041] (4) Add alkali to the solution prepared in step (3), adjust the pH value of the solution to 7.2, and obtain the p...

Embodiment 3

[0043] The preparation method of the segregation bleeding inhibitor for cement concrete of the present invention, the steps are:

[0044] (1) In parts by weight (unit: gram), take respectively 0.05 parts of initiator ammonium persulfate, 5 parts of alkali, 20 parts of acrylic acid, and 40 parts of water, and add them together to a tank equipped with a thermometer, a stirrer and a dropping device. In a four-neck flask, stir evenly;

[0045](2) In parts by weight (unit: gram), take concentration respectively and be 1.5 parts of 5% hydrogen peroxide as oxidizing agent, 1.1 parts of reducing agent vitamin C and 0.005 part of chain transfer agent mercaptopropionic acid, add dropwise to step (1) ) in the prepared solution, control reaction 1 hour, obtain the solution that generates the sodium polyacrylate with large molecular weight;

[0046] (3) In parts by weight (unit: gram), weigh 5 parts of acrylic acid, 3 parts of acrylamide, and 23 parts of water, and add them to the solutio...

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Abstract

The invention discloses a segregation and weeping inhibitor for cement concrete. The segregation and weeping inhibitor for cement concrete is composed of organic polymer and a compounding ingredient. The organic polymer contains, by weight, 18-25 parts of acrylic acid and 3-5 parts of acrylamide. The compounding ingredient comprises, by weight, 0.05 part of an initiator, 1.4-1.6 parts of an oxidizing agent, 1.0-1.2 parts of a reducing agent, 0.005-0.008 part of a chain transferring agent and 5-10 parts of alkali. The reaction process of external heat source is not required for the preparation of the segregation and weeping inhibitor. Thus, energy can be saved and emission can be minimized. The prepared product can effectively inhibit segregation and weeping phenomena of cement concrete and improve workability of cement concrete, and has wide industrial application.

Description

technical field [0001] The invention relates to a segregation bleeding inhibitor for cement concrete and a preparation method thereof, belonging to the technical field of cement concrete admixtures in building materials. Background technique [0002] As one of the main materials in the field of civil engineering, cement concrete is widely used in industrial and civil construction, transportation infrastructure construction, marine engineering and other fields. [0003] The increasing consumption of concrete by large-scale civil engineering structures is also showing a sharp increase trend, resulting in the depletion of stones and sand as raw materials, the quality declines, and the gradation deviates from the use standard of concrete. [0004] Adding appropriate chemical additives into concrete can significantly improve the workability and performance of concrete, save cement and reduce costs. Therefore, concrete admixture has become an important measure to optimize the mix...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/56C08F120/06C08F2/38C08F265/02C04B24/26
CPCC04B40/0046C04B2103/0067C08F2/38C08F120/06C08F265/02C08F220/06C08F220/56C04B24/2641C04B24/2652C04B24/04
Inventor 冯正义庞来学刘昆明
Owner 山东江泰建材科技有限公司