Upgrading the Technology of Chipboards Manufacturing from Softwood with Increased Biostability

Abstract

Expansion of the raw materials base for building materials production is possible at the expense of soft-wooded broadleaved species little used nowadays. All these timber species are characterized by lower strength if compared with the strength of hard-wooded broadleaved species or pine-wood. They are also prone to crackling and decay. In construction industry, they could be used after special treatment by modifiers. High porosity facilitates the improved substances absorption. As the result, impregnated wood with porous structure would have improved technical properties. Thus, the use of soft-wooded broadleaved species as a renewable available source of raw materials for manufacturing construction products is regarded as the acute practical issue from the perspective of technology, ecology and economy. The implemented experimental studies for treatment of broadleaved wood by the wood preservative “Ksilostat” have shown that the wood preservative has proved to 100% efficient to perform the task. The results of experimental tests are presented. The implemented work aimed at developing technological solutions for woodchip board production from broadleaved hardwood of improved biological stability allowed proposing technological scheme of manufacturing bio-retardant boards with introduction of timber preservation production unit followed by wood chip drying.