Auto-waterproof bridging particle

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...

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 i...

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