Influence of thermal treatment and polymer impregnation on the strength and deformation properties of wood
EDN: EDFFAP
Abstract
Introduction. Despite its widespread use, wood is relatively weak. This has led to the development of methods to enhance its properties. This article examines two primary methods of modification: thermal treatment and impregnation with polymer compounds. Thermal treatment increases resistance to decay and reduces water absorption. Impregnation provides protection against biological agents, enhances wear resistance, and achieves nearly zero water absorption.
Aim. This paper aims to compare the physical, mechanical, and strength properties of untreated, thermally treated, and polymer-impregnated pine wood.
Materials and methods. Natural compression tests were conducted on second-grade pine wood specimens along the fiber direction. Vertical compressive stresses and deformations were recorded. The tests were performed using a hydraulic press with a maximum load capacity of 50 tons. Strain and stress measurements were taken using a strain gauge.
Results. During the in-place tests, the physical-mechanical properties of untreated, thermally treated, polymer-impregnated, and both thermally treated and polymer-impregnated wood were determined. The ultimate strength of the samples was identified and graphs of relative deformations were constructed to show changes in wood strength limits during the elastic stage of material behavior. According to the in-place test results, the elastic stage of wood compression extends up to 120 kN.
Conclusions. In-place tests revealed that thermal treatment and polymer impregnation of wood results in reduced deformability and increased brittleness and friability of the material, as evidenced by the nature of sample failure. Additionally, there is a 5–10 % decrease in material strength and elastic modulus. However, wood modification enhances protection against biological agents and moisture, thereby extending the service life of the structure.
About the Authors
N. V. Kolesnikov
Penza State University of Architecture and Construction
Russian Federation
Russian Federation
Nikita V. Kolesnikov*, Graduate Student, Department of Building Structures, Penza State University of Architecture and Construction, Penza
German Titov str., 28, Penza, 440028, Russian Federation
e-mail: ko1esnikov.1998@list.ru
M. V. Ariskin
Penza State University of Architecture and Construction
Russian Federation
Russian Federation
Maxim V. Ariskin, Cand. Sci. (Engineering), Associate Professor, Department of Building Structures, Penza State University of Architecture and Construction, Penza
German Titov str., 28, Penza, 440028, Russian Federation
e-mail: m.v.ariskin@mail.ru
D. O. Martyshkin
Penza State University of Architecture and Construction
Russian Federation
Russian Federation
Daniil O. Martyshkin, Assistant, Department of Building Structures, Penza State University of Architecture and Construction, Penza
German Titov str., 28, Penza, 440028, Russian Federation
e-mail: historical95@mail.ru
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Review
For citations:
Kolesnikov N.V., Ariskin M.V., Martyshkin D.O. Influence of thermal treatment and polymer impregnation on the strength and deformation properties of wood. Bulletin of Science and Research Center of Construction. 2025;45(2). (In Russ.) EDN: EDFFAP
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