Plywood for concrete formwork and preparation method thereof

Abstract

The invention provides plywood for a concrete formwork and a preparation method thereof. The plywood for the concrete formwork comprises a core layer, bonding layers, reinforcing layers and sealing layers, wherein the bonding layers and the reinforcing layers are arranged sequentially on the two bottom faces of the core layer, and the sealing layers are used for at least sealing the side faces of the core layer and the reinforcing layers correspondingly. Each bonding layer comprises a bonding medium layer and a bonding agent layer. The preparation method comprises the steps that the bonding medium layers are formed on one bottom faces of the reinforcing layers; the bonding agent layers are formed on the upper bottom face and the lower bottom face of the core layer correspondingly; the bonding medium layers bonded with the reinforcing layers cover the bonding agent layers; and the sealing layers are laid on the side faces of all the layers, and thus the plywood for the concrete formwork is obtained. The plywood for the concrete formwork has high strength and waterproof performance and is long in service life and high in reusing time, wood is effectively saved, and protecting of the environment is facilitated.

Description

technical field [0001] The invention belongs to the technical field of composite materials and wood materials, and relates to a plywood for concrete formwork and a preparation method thereof. Background technique [0002] Building formwork is an important tool for construction in concrete structure engineering. In cast-in-place concrete structure engineering, formwork engineering generally accounts for 20%-30% of the cost of concrete structure engineering, 30%-40% of engineering labor costs, and about 50% of the construction period. Formwork technology directly affects the quality, cost and benefit of engineering construction. Therefore, it is an important content to promote the progress of my country's construction technology. [0003] In recent years, with the development of my country's social economy and the acceleration of urbanization, the annual new construction area is about 2 billion square meters. In 2010, my country's construction scale has ranked first in the wo...

AI Technical Summary

Problems solved by technology

In order to solve this problem, there are two commonly used methods. One is to change the raw materials of building formwork, such as using metal building formwork (such as steel formwork), bamboo integrated boards or aluminum alloy formwork to replace plywood; the other is to improve the strength of wood plywood formwork. Turnover times, such as steel frame or aluminum alloy frame-plywood assembly formwork made of steel frame or aluminum alloy frame reinforced plywood, but the above construction formwork still has many defects

The proportion of metal building formwork (such as steel formwork) is large, not only its own cost is high, but also transportation and installation will consume a lot of labor costs. Although there are many turnover times, the one-time cost investment is large; Bamboo chips are bonded and integrated, and generally can be used 8-10 times, so it is difficult to meet the durability requirements when used as a building formwork

If the use of wood plywood is increased by assembling the formwork with steel frame or aluminum alloy frame-plywood, the effect of assembling the formwork will be affected because the wood plywood itself is not durable

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