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Auto-waterproof bridging particle

A technology of waterproof plugging and plasticizer, which is applied in the field of engineering materials, can solve the problems of difficult construction operation, fast setting time, and insufficient strength, and achieve the effects of shortening setting time, improving early strength, and improving impermeability

Inactive Publication Date: 2010-07-07
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of its fast solidification, it is often mixed unevenly and it can be used, and the cement shrinks greatly, and the surrounding area often seeps
Moreover, the material lacks cohesion with the old concrete base, and it is easy to separate from the base, which eventually leads to the failure of plugging
In addition, water glass has a strong corrosive effect on the skin, easily burns the skin, and brings difficulties to the construction operation.
The second type is cement-organic coagulant. This type of material is based on ordinary cement, and a certain proportion of plugging materials such as organic solution, synthetic resin solution and water-soluble resin are added. The advantage of this type of material is that the setting time is fast. , but the price is expensive, and the performance is not stable, the durability is poor, and it is not resistant to acid and alkali corrosion
However, the rapid plugging materials that only use fluoroaluminate cement and sulfoaluminate cement as the main components have the disadvantage that although they can set in a few minutes, their early strength is not high enough. Although compared with general cement, the hourly strength is relatively High, generally the 6h compressive strength can reach about 10.0MPa, but it is far from meeting the technical requirements of the 1h compressive strength not less than 4.5MPa and the flexural strength not less than 1.5MPa required by the building materials industry standard, which is not enough to To the role of water plugging
Secondly, the bonding performance cannot meet the standard requirement of 7d not less than 1.2MPa, and the bonding performance with the old surface is poor, so it is not suitable for repairing the existing surface leakage
In addition, measures to improve the waterproof performance of the material are not considered, such as improving the expansion performance of the material to reduce the occurrence of cracks
[0008] Judging from the rapid plugging materials currently on the market, some materials have the disadvantage of late shrinkage, and most of them use expansion agents as the expansion source to compensate for shrinkage. Once the amount of expansion agent is not properly controlled, adverse reactions will occur and affect the building. Durability; In addition, the waterproof performance of these leak-stopping materials is not obvious

Method used

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Embodiment Construction

[0019] In order to disclose more clearly, the present invention is described from several aspects below.

[0020] For waterproof plugging materials, from a mechanism point of view, the three most important indicators are: setting time, strength, and impermeability (expansion rate). Only by meeting the requirements of these three indicators can we get good results in engineering.

[0021] The self-waterproof high-performance quick-acting plugging agent provided by the present invention is based on sulphoaluminate cement (including iron-aluminate cement) and aluminum materials that meet the current standard requirements, adding appropriate amount of gypsum, micro-expansion components, coagulation The time adjusting agent, hardening agent, plasticizer, adhesive and other materials for improving the performance of waterproof and leak-proofing are prepared together, so that the above-mentioned performance of the material is obviously better than that of the existing waterproof and ...

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Abstract

The invention provides an auto-waterproof bridging particle which belongs to the field of engineering materials. The particle is formed by mixing 20 to 85 weight parts of sulphoaluminate cement, 5 to 26 weight parts of aluminoferrite cement, 5 to 20 weight parts of alumina material, 3 to 10 weight parts of gypsum, 2 to 10 weight parts of microdilatancy component, 0 to 5.0 weight parts of setting time regulating agent, 0 to 5.0 weight parts of hardening accelerator, 0 to 1.0 weight parts of plasticizing agent and 0 to 3.0 weight parts of binding material. The bridging particle of the invention is characterized by rapid bridging, swelling in water, permeating crystallization, auto-healing for fine crack and permanent waterproof property and can efficiently solve the problem of bridging the concrete structure which is leaked.

Description

technical field [0001] The invention relates to engineering materials, in particular to a self-waterproof high-performance quick-acting plugging agent made of sulphoaluminate cement, ferroaluminate cement and aluminum materials as the base material and compounded with various functional admixture materials . Background technique [0002] In construction engineering, water conservancy engineering, and municipal engineering, leakage of buildings and structures is often caused by poor structural design, improper selection of waterproof materials, poor construction quality, and uneven foundation settlement. Because the impermeability of concrete materials and the brittle cracking of concrete structures are not fully considered in the design and construction, many large concrete buildings, concrete cut-off walls, basements, tunnels, etc. have different degrees of leakage diseases, which seriously affect their The function of use will affect the normal use and life of the structu...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/00284C04B2111/27C04B2111/00663C04B2103/0008C04B2111/343
Inventor 刘云王显斌刘克忠
Owner CHINA BUILDING MATERIALS ACAD
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