PSI - Issue 81

Oleksandr Matviiuk et al. / Procedia Structural Integrity 81 (2026) 493–498

497

It was found that autoclave impregnation of wood with Silor significantly improves strength and deformability under water exposure. In particular: Maximum compressive stresses increase by 2.15-2.47 times, and the modulus of elasticity increases by 1.70-1.99 times; Relative critical strains decrease by 1.32-1.42 times; Ultimate strains decrease by 1.39-1.41 times; Residual strains decrease by 1.26-1.39 times, compared to untreated wood under the same conditions. Therefore, it can be concluded that water exposure has almost no effect on Silor-modified wood. 4.Conclusions 1. Field experimental studies of untreated and Silor-modified spruce and ash wood samples under single short-term axial compression along the grain in water environments under a rigid loading regime were carried out. 2. Deformation diagrams of the tested prisms were constructed, and the main parameters in the pre-critical and post-critical stages of behaviour were determined. 3. Silor modification via autoclave impregnation significantly improves the strength and deformability of wood under water exposure. Specifically, maximum stresses increase by 2.15-2.47 times, the modulus of elasticity increases by 1.70-1.99 times, relative critical strains decrease by 1.32-1.42 times, ultimate strains decrease by 1.33-1.41 times, and residual strains decrease by 1.26-1.39 times compared to untreated wood in the same environment. 4. Water exposure has negligible effect on the mechanical performance of Silor-modified wood. References Abolore, R.S., Jaiswal, S., Jaiswal, A.K., 2025. A comprehensive review on sustainable lignin extraction techniques, modifications, and emerging applications. Ind. Crop. Prod. 235 , 121696. Albrektas, D., Juciene, M., Dobilaite, V., 2020. The influence of thermal modification on the resistance to water impact properties and strength of wood used in outdoor conditions. Wood research 65(3), 353-364. 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