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Low-sensitive type polycarboxylic acid slump retaining agent and preparation method thereof

The technology of a type of polycarboxylic acid and slump retention agent is applied in the field of low-sensitivity polycarboxylic acid slump retention agent and its preparation, which can solve the problems of bleeding or segregation, inconvenient use of commercial concrete, and excessive loss of concrete over time. To achieve the effect of improving dosage sensitivity, wide molecular distribution and reducing activity

Active Publication Date: 2017-02-01
KZJ NEW MATERIALS GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For a long time, the rapid loss of commercial concrete slump has caused certain difficulties to on-site construction. Scholars at home and abroad have been devoting themselves to the research of high-slump polycarboxylates, which have effectively solved the problem of excessive concrete loss over time. In the process of high slump polycarboxylate, due to the "lag amplification" effect of high slump polycarboxylate, the fluidity of concrete over time is affected by the amount of polycarboxylate and it is difficult to control, and even bleeding or segregation after standing Phenomena such as this have brought inconvenience to the use of ready-made concrete

Method used

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  • Low-sensitive type polycarboxylic acid slump retaining agent and preparation method thereof
  • Low-sensitive type polycarboxylic acid slump retaining agent and preparation method thereof
  • Low-sensitive type polycarboxylic acid slump retaining agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get 85 parts of monomer prenol polyoxyethylene ether (TPEG) (molecular weight: 2400) and 100 parts of water into the reaction container, stir until the monomer is completely dissolved, and drop A, B, C, D four kinds of solution, A, B, D solution dropwise time is 1.5h, C solution dropwise time is 1.6h, reaction temperature is controlled at 10 ~ 45 ℃, keep warm for 1h after dropwise addition, add NaOH solution to adjust the pH to 5 , replenishing water so that the solid content of the reaction solution is reduced to 40%, to obtain the low-sensitivity polycarboxylate slump-retaining agent;

[0028] Among them, A solution is: take 3.3 parts of acrylic acid, 1 part of sodium acrylate and 9 parts of hydroxyethyl acrylate, dissolve them in 10 parts of water, and obtain A solution;

[0029] B solution is: take 0.5 parts of hydrogen peroxide and dissolve in 10 parts of water to obtain B solution;

[0030] C solution is: take 0.3 parts of ascorbic acid and dissolve in 10 parts o...

Embodiment 2

[0035] Get 85 parts of monomer prenol polyoxyethylene ether (TPEG) (molecular weight: 2400) and 100 parts of water into the reaction container, stir until the monomer is completely dissolved, and drop A, B, C, D four kinds of solution, A, D solution dropwise time is 1h, B, C solution dropwise time is 1.2h, reaction temperature is controlled at 10~45 ℃, keep warm for 1h after dropwise addition, add NaOH solution to adjust pH to 5.5, Replenish water so that the solid content of the reaction solution is reduced to 40%, to obtain the low-sensitivity polycarboxylate slump-retaining agent;

[0036] Among them, the A solution is: take 3.3 parts of methacrylic acid, 1.6 parts of sodium methacrylate and 8 parts of hydroxypropyl acrylate, and dissolve them in 10 parts of water to obtain the A solution;

[0037] Solution B is: take 0.8 parts of hydrogen peroxide and dissolve in 10 parts of water to obtain solution B;

[0038] Solution C is: take 0.6 parts of diaobai and dissolve in 10 p...

Embodiment 3

[0041] Take 80 parts of monomer prenol polyoxyethylene ether (TPEG) (molecular weight: 2400) and 100 parts of water into the reaction container, stir until the monomer is completely dissolved, and drop A, B, C, D four kinds of solutions, A solution dripping time is 1h, B, C, D solution dripping time is 1.2h, the reaction temperature is controlled at 10 ~ 45 ℃, keep warm for 1h after dropping, add NaOH solution to adjust the pH to 5, Replenish water so that the solid content of the reaction solution is reduced to 40%, to obtain the low-sensitivity polycarboxylate slump-retaining agent;

[0042] Among them, the A solution is: take 5 parts of acrylic acid, 1.5 parts of sodium acrylate and 11.3 parts of hydroxyethyl acrylate, and dissolve them in 10 parts of water to obtain the A solution;

[0043] B solution is: take 0.9 parts of hydrogen peroxide and dissolve in 10 parts of water to obtain B solution;

[0044] Solution C is as follows: take 0.5 parts of diaobai and dissolve in ...

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Abstract

The invention discloses a low-sensitive type polycarboxylic acid slump retaining agent and a preparation method thereof. A structural formula of effective components of the low-sensitive type polycarboxylic acid slump retaining agent is shown as below (please see the formula in the description). The low-sensitive type polycarboxylic acid slump retaining agent can effectively reduce sensitivity of age flowing of concrete, and the phenomena that due to the fact that the mixing amount of the polycarboxylic acid slump retaining agent is too high or too low, after standing is conducted on the concrete, bleeding (even segregation) occurs, or the flowability is too poor can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a low-sensitivity polycarboxylic acid slump-retaining agent and a preparation method thereof. Background technique [0002] For a long time, the rapid loss of commercial concrete slump has caused certain difficulties for on-site construction. Scholars at home and abroad have been devoting themselves to the research of high-slump polycarboxylates, which have effectively solved the problem of excessive concrete loss over time. In the process of high slump polycarboxylate, due to the "lag amplification" effect of high slump polycarboxylate, the fluidity of concrete over time is affected by the amount of polycarboxylate and it is difficult to control, and even bleeding or segregation after standing Phenomena such as, have brought inconvenience to the use of ready-made concrete. Since the time-dependent fluidity test period of concrete is much longer than the i...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F220/28C04B24/26C04B103/30
CPCC04B24/2694C04B2103/30C08F283/065C08F220/281
Inventor 代柱端方云辉蒋卓君官梦芹陈小路
Owner KZJ NEW MATERIALS GROUP CO LTD
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