Super-absorbent-resin-type self-maintenance material for concrete and preparation method

A super absorbent resin, self-curing technology, applied in the field of building materials, can solve the problems of cracking in concrete construction, prevent and control the insufficient shrinkage of concrete, achieve a mild and stable reaction system, excellent self-curing performance indicators, and avoid poor workability. Effect

Active Publication Date: 2016-06-08
RES INST OF HIGHWAY MINIST OF TRANSPORT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a superabsorbent resin type self-curing material and its preparation method, to solve the problem that the existing external curing technology has insufficient effect on preventing concrete shrinkage and easily leads to cracking in concrete engineering construction

Method used

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  • Super-absorbent-resin-type self-maintenance material for concrete and preparation method
  • Super-absorbent-resin-type self-maintenance material for concrete and preparation method
  • Super-absorbent-resin-type self-maintenance material for concrete and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Formula composition: 100 parts of deionized water, 0.01 part of disodium edetate, 0.05 part of triethanolamine, 2.5 parts of polyoxyethylene ether monomer, 0.006 part of N, N, N'N'-tetramethylethylenediamine , 0.025 parts of N, N'-methylenebisacrylamide, 1 part of acrylic acid, 25 parts of ethacrylamide, 0.02 parts of potassium persulfate.

[0052] Preparation:

[0053] (1) Accurately weigh deionized water and disodium ethylenediaminetetraacetate in turn, add to the reaction vessel and stir evenly;

[0054] (2) Accurately weigh triethanolamine, add it into the reactor described in step (1) and stir evenly;

[0055] (3) Accurately weigh polyoxyethylene ether series monomers, add them into the reactor described in step (2) and stir evenly;

[0056] (4) Accurately weigh N, N, N'N'-tetramethylethylenediamine, and sequentially add to the reactor described in step (3) and stir evenly;

[0057] (5) Accurately weigh N,N'-methylenebisacrylamide, add it into the reaction vesse...

Embodiment 2S

[0068] Formula composition: 100 parts of deionized water, 0.02 parts of disodium edetate, 0.07 parts of triethanolamine, 20 parts of polyethylene glycol monomer, 0.02 parts of N, N, N'N'-tetramethylethylenediamine , 0.1 parts of N, N'-methylenebisacrylamide, 4 parts of methacrylic acid, 50 parts of acrylamide, 0.055 parts of ammonium persulfate.

[0069] Preparation:

[0070] (1) Accurately weigh deionized water and disodium ethylenediaminetetraacetate in turn, add to the reaction vessel and stir evenly;

[0071] (2) Accurately weigh triethanolamine, add it into the reactor described in step (1) and stir evenly;

[0072] (3) Accurately weigh polyoxyethylene ether series monomers, add them into the reactor described in step (2) and stir evenly;

[0073] (4) Accurately weigh N, N, N'N'-tetramethylethylenediamine, and sequentially add to the reactor of step (3) and stir evenly;

[0074] (5) Accurately weigh N,N'-methylenebisacrylamide, add it into the reaction vessel described...

Embodiment 3

[0085] Formula composition: 100 parts of deionized water, 0.02 parts of disodium edetate, 0.07 parts of triethanolamine, 20 parts of polyethylene glycol monomer, 0.02 parts of N, N, N'N'-tetramethylethylenediamine , 0.1 parts of N, N'-methylenebisacrylamide, 4 parts of methacrylic acid, 50 parts of acrylamide, 0.055 parts of ammonium persulfate.

[0086] Preparation:

[0087] (1) Accurately weigh deionized water and disodium ethylenediaminetetraacetate in turn, add to the reaction vessel and stir evenly;

[0088] (2) Accurately weigh triethanolamine, add it into the reactor described in step (1) and stir evenly;

[0089] (3) Accurately weigh the polyethylene glycol monomer, add it into the reactor described in step (2) and stir evenly;

[0090] (4) Accurately weigh N, N, N'N'-tetramethylethylenediamine, and sequentially add to the reactor described in step (3) and stir evenly;

[0091] (5) Accurately weigh N,N'-methylenebisacrylamide, add it into the reaction vessel describ...

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Abstract

Disclosed are a super-absorbent-resin-type self-maintenance material for concrete and a preparation method of the self-maintenance material. The method comprises: introducing a super-absorbent-resin-type functional component material for water maintenance into concrete, wherein the material includes deionized water, disodium ethylene diamine tetraacetate, triethanolamine, interpenetrating polymer networks, acrylic acid and a derivative thereof, acrylamide and a derivative thereof, a reducing agent, a cross-linking agent, and an initiator, and carrying out a constant-temperature polymerization reaction, standing, shearing, drying, and pulverizing to prepare the self-maintenance material. Disodium ethylene diamine tetraacetate, triethanolamine, and interpenetrating polymer networks which can highly absorb an alkaline ionic solution are introduced, so that the problem that a conventional super absorbent resin is poor in absorption of a cement hydrated solution is overcome. (Un-neutralized) acrylic acid and the derivative thereof are adopted, and the preparation method and device are simplified. The self-maintenance material has an absorption rate ratio of water to a concrete mixture centrifugate being 0.5-1.2, and a particle size of 0.1-50.0 mum. The risk that a self-maintenance material is liable to cause poor workability and lost mechanical properties of concrete is lowered.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a concrete superabsorbent resin type self-curing material and a preparation method thereof. Background technique [0002] At present, taking the resource-saving development path has become the inevitable development of concrete engineering. Improving the quality of engineering construction and prolonging the service life of engineering are the core of construction and development. The problem of cracking in concrete engineering construction is ubiquitous, and with the wide application of high-strength concrete, the problem of cracking is exacerbated. Construction cracks accelerate the deterioration of concrete engineering, resulting in inherent deficiencies in engineering quality, which seriously affect service safety, applicability, and durability. How to improve the crack prevention technology of concrete engineering construction is a major technical issue of intern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F220/06C08F222/38C08F220/56C08F220/58C04B24/26C04B103/46
CPCC04B24/2694C04B2103/465C08F220/54C08F220/56C08F220/58C08F220/06C08F222/38C08F220/34
Inventor 张守祺王振华傅宇方赵尚传
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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