Influence of thermal treatment on mechanical properties of pine wood with regard to prime cost

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Abstract

Currently, it is relevant to create new and modify existing building materials in order to improve their physical, mechanical and operational properties. Wood is one of the common building materials. In order to improve the service life of wooden structures and products, it is necessary to protect them from negative factors. The most eco-friendly is thermal treatment. As an alternative to thermal modification in the hot steam/gas environment and wood burning, it is proposed to use the surface treatment with low-temperature plasma. To determine the possibility of using this type of treatment, it is necessary to study the plasma flow effect on mechanical properties of wood. However, its prime cost restricts the application of this method. The paper presents results of compressive strength testing along the fiber for pine samples before and after the treatment with low-temperature plasma and gas burner. Both methods have no effect on the compressive strength. It is shown that the treatment cost is significantly lower than that with the gas burner. Comparatively low cost of the plasma treatment is provided by the high process performance, which, in turn, is achieved through a significant value of specific heat flows.

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