Semiflexible rapid leakstopping mortar with high impermeability

Abstract

The invention provides semiflexible rapid leakstopping mortar with high impermeability and certain flexibility, which comprises the following components in percentage by weight: 45-65% of aluminate cement used as a gelled material, 20-40% of mineral filler, 0.5-2% of bentonite used as a waterproofing agent, 2-5% of plaster used as an expanding agent, 0.1-0.5% of coagulant, 0.2-0.5% of water reducing agent, 2-4% of spurrite and 1-2% of redispersible latex power, wherein the coagulant, the water reducing agent, the spurrite and the redispersible latex power are used as auxiliary materials. The leakstopping mortar has the advantages of high setting speed, high strength, no later strength shrinkage, high bonding strength, high impermeability, microdilatancy, high deformation resistance and the like and can be widely applied to leakstopping of concrete structures, such as a water pool, a house, a basement and a tunnel.

Description

technical field [0001] The present invention relates to a plugging mortar, in particular to a plugging mortar for cement-concrete structures, and more particularly to a plugging mortar suitable for repairing projects such as pools, houses, basements, and tunnels, etc. Flexible semi-flexible fast plugging mortar. Background technique [0002] Existing buildings mostly adopt cement and concrete as structural materials to construct. Cement concrete structures often have cracks due to self-hydration shrinkage, insufficient compactness, substandard impermeability, foundation settlement, deformation caused by temperature changes, design defects, and construction that do not meet the requirements, forming leakage points. There is leakage in the building structure, which not only affects the normal use, but also shortens the service life of the building. Therefore, waterproofing and plugging treatment is an effective solution. [0003] At present, there are many kinds of rapid plu...

AI Technical Summary

Problems solved by technology

These two types of plugging materials have more or less disadvantages in terms of the effect of use. Some have low bonding strength, are easy to fall off, and cannot meet the plugging requirements; Some leak points; some contain harmful substances, which is not conducive to the long-term performance of concrete buildings;

In recent years, some people have been modifying the defects of plugging products on the market. For example, the Chinese patent application number is 03111858.5, and the patent named "rapid plugging agent" provides a fast plugging agent with high strength and short setting time. The plugging agent improves the early strength and shortens the setting time by changing the composition of the cement base material, but does not improve the impermeability strength, and uses chloride salt as a coagulant, which is not conducive to the concrete structure. Rebar Protection

The Chinese patent application No. 200410099364.6 provides a plugging and waterproofing material. The plugging and waterproofing material is a cementitious material system compounded with Portland cement and high alumina cement clinker, and is solved by adding bentonite. The problem of water seepage in cracks, because the whole system is affected by the fluctuation of the mineral composition of Portland cement and high alumina cement clinker, it is easy to lead to uncontrollable setting and hardening time, and the patent does not consider the problem of negative growth in the late strength of the compound cementitious material system

However, the use of high-volume bentonite may easily lead to a decrease in the strength of the waterproof material, thereby reducing the compactness of the waterproof material and ultimately affecting the impermeability.

Images