Cement-based wood crack elastic repairing agent

Abstract

The invention relates to a cement-based wood crack elastic repairing agent.The cement-based wood crack elastic repairing agent is composed of, by weight, 20-40 parts of cement, 5-30 parts of saw dust, 5-10 parts of rubber powder, 0.1-0.3 part of cellulose ether, 0.05-0.8 part of lignocelluloses, 0.1-0.02 part of a water reducing agent, 0.2-0.5 part of a defoaming agent, 45-60 parts of lightweight calcium powder, 1-2 parts of a surfactant and 0.3-0.8 part of a shrinkage reducing agent, wherein water addition quantity is 23-28% of the weight of powder.The cement-based wood crack elastic repairing agent has the advantages of environment friendliness and freeness of pollution; the repairing agent can be prepared in required quantity when needed, so that waste is reduced, and fine adjustment of thickness of the repairing agent can be realized according to crack sizes; the repairing agent is elastic after being dried, high in adhesiveness to wood and free of shrinkage; the repairing agent is applicable to cracks in a range of 0.1-10mm, thereby being extensive in application range.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a repair material, in particular to an elastic repair material for wood cracks. Background technique [0002] Timber has been a very important resource since ancient times. With the rapid development of the current economy and society, forest resources are becoming increasingly scarce. At the same time, the country has increased the protection of forest resources. Combining multiple factors, timber resources are becoming more and more tense. Efficient use of existing timber Resources have become an important topic. Partial defects of wood often affect the beauty of the whole wood and are discarded. Cracks are a very common defect of wood. This kind of crack not only seriously affects the appearance, but also easily causes later deformation and bacteria breeding. [0003] At present, various wood repair agents have been sold on the market. These repair agents are mainly organic repair ...

AI Technical Summary

Problems solved by technology

Partial defects of wood often affect the beauty of the whole wood and are discarded. Cracks are a very common defect in wood. This kind of crack not only seriously affects the appearance, but also easily causes later deformation and bacteria breeding.

[0003] At present, various wood repair agents have been sold on the market. These repair agents are mainly organic repair agents such as latex, but these materials generally have poor wettability, and their surface tension is large, so it is difficult to fill cracks. Fine parts, and for larger cracks, defects such as flow, bulge, and depression are prone to occur

More importantly, such materials generally contain more volatile organic solvents, which can cause environmental pollution especially when used indoors

There are also wood putty for repair, but this material is mainly inorganic material, poor elasticity, it is difficult to match the high volume change performance of wood, especially in larger cracks, and this material does not Water resistance, powder shedding, sunken after drying

The invention patent "A Wood Repairing Agent" (application number: 201210548256.7) provides a technical solution for a wood repairing agent, but more than 90% of its composition is organic materials, although compared with pure organic repairing agents, it can It has improved in terms of strength, etc., but its defects of containing more organic solvents and poor wettability are still difficult to solve