Steam-cured concrete member repairing agent and preparation method and application thereof

A repairing agent and concrete technology, which is applied in the field of steam-cured concrete member repairing agent and its preparation, can solve the problems of powder dropping, low strength of the repaired part, large color difference between the repaired part and the member, etc., and achieve the purpose of increasing the hydration rate, increasing the strength, The effect of promoting cement hydration

Active Publication Date: 2021-11-09
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of large color difference between the repaired part and the member itself, low strength of the repaired part, and even powder drop after repairing the steam-cured concrete member by the existing method

Method used

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  • Steam-cured concrete member repairing agent and preparation method and application thereof

Examples

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no. 1 example

[0028] A preparation method of a steam curing concrete component repair agent, comprising the following steps:

[0029] (1) Take 12 parts by weight of white Portland cement, 13 parts by weight of white α hemihydrate gypsum, 8 parts by weight of 42.5 ordinary Portland cement, 6 parts by weight of 42.5 quick-hard sulfoaluminate cement, 60 parts by weight of sand, 1 part by weight of diatomaceous earth, 0.2 part by weight of retarder, 0.05 part by weight of water reducing agent, 1.0 part by weight of water retaining agent, and 15 parts by weight of water, for later use.

[0030] Wherein: the retarder is a mixture of tartaric acid and PE retarder in a mass ratio of 1:1. The water-reducing agent is a high-efficiency water-reducing agent of polycarboxylic acid. The water-retaining agent is polyacrylamide. The diatomite is an industrial raw material, and the diatomite is treated as follows: soaking in water and then blowing the air until the surface is slightly dry. The fineness m...

no. 2 example

[0035] A preparation method of a steam curing concrete component repair agent, comprising the following steps:

[0036](1) Take 10 parts by weight of white Portland cement, 10 parts by weight of white α hemihydrate gypsum, 7 parts by weight of 42.5 ordinary Portland cement, 7 parts by weight of 42.5 quick-hard sulfoaluminate cement, 55 parts by weight of sand, 2 parts by weight of diatomaceous earth, 0.05 part by weight of retarder, 0.1 part by weight of water reducing agent, 0.5 part by weight of water retaining agent, and 20 parts by weight of water, for subsequent use.

[0037] Wherein: the retarder is a mixture of tartaric acid and PE retarder in a mass ratio of 1:2. The water-reducing agent is a high-efficiency water-reducing agent of polycarboxylic acid. The water-retaining agent is sodium polyacrylamide. The diatomite is a chemically pure reagent, and the diatomite is treated as follows: soaking in water and then blowing the air until the surface is slightly dry. The...

no. 3 example

[0042] A preparation method of a steam curing concrete component repair agent, comprising the following steps:

[0043] (1) Take 15 parts by weight of white Portland cement, 15 parts by weight of white α hemihydrate gypsum, 10 parts by weight of 42.5 ordinary Portland cement, 10 parts by weight of 42.5 quick-hard sulfoaluminate cement, 50 parts by weight of sand, 2 parts by weight of diatomaceous earth, 0.05 part by weight of retarder, 0.1 part by weight of water reducing agent, 1.0 part by weight of water retaining agent, and 20 parts by weight of water, for subsequent use.

[0044] Wherein: the retarder is a mixture of tartaric acid and PE retarder in a mass ratio of 1:1.5. The water-reducing agent is a high-efficiency water-reducing agent of polycarboxylic acid. The water-retaining agent is ammonium polyacrylate. The diatomite is a chemically pure reagent, and the diatomite is treated as follows: soaking in water and then blowing the air until the surface is slightly dry....

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Abstract

The invention discloses a steam-cured concrete member repairing agent and a preparation method and application thereof. The repairing agent comprises the following components: 50-66 parts by weight of sand, 1-3 parts by weight of diatomite, 0.6-1.7 parts by weight of an additive, 15-20 parts by weight of water and a composite cementing material formed by 7-10 parts by weight of Portland cement, 7-10 parts by weight of sulphoaluminate cement, 10-15 parts by weight of white Portland cement and 10-15 parts by weight of white alpha semi-hydrated gypsum. By designing a material system of thecomposite cementing material mainly formedby the white Portland cement, the white alpha semi-hydrated gypsum, the Portland cement and the sulphoaluminate cement, the color of the obtained repairing agent is consistent with that of a steam-cured concrete member, so that the problems that since the color difference between a repaired part and the member is large, the appearance quality of concrete steam cured member is poor, and the concrete steam cured member is often mistakenly regarded as a defective goods are overcome, and meanwhile, the problem that the repairing mortar is low in strength and even powder falls off is solved.

Description

technical field [0001] The invention relates to the technical field of repairing concrete components, in particular to a steam curing concrete component repairing agent and a preparation method and application thereof. Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] Prefabricated concrete components are building components that are prefabricated in factories with concrete as the basic material, mainly including beams, slabs, columns and building decoration accessories. conservation. Compared with cast-in-place concrete, factory-produced prefabricated concrete has many advantages, such as better construction safety, easier quality control, improved construction efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B7/02C04B7/32C04B14/08C04B24/26C04B111/72C04B103/46
CPCC04B28/146C04B7/02C04B7/32C04B14/08C04B24/2652C04B24/2688C04B2111/72C04B2103/465C04B2201/50C04B14/06C04B2103/22C04B2103/302Y02W30/91
Inventor 黄永波张爱军孙长彪刘宗武王启玲张国辉刘诚诚王诗涵王海英芦令超程新
Owner UNIV OF JINAN
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