Title:

Change in the chemical composition and strength of wood that has been used for a long time under water

Alternative title:

Zmiana składu chemicznego i wytrzymałości drewna użytkowanego przez długi czas pod wodą

Creator:

Chernykh, Aleksandr ; Shkarovskiy, Alexander ; Kudryavtsev, Ivan ; Koval, Pavel ; Mamedov, Shirali

Subject:

mechanical properties of wood ; long-term durability ; chemical composition of wood ; water-soluble extractive substances

Description:

The article shows the importance of analyzing old wood strength properties in restoration and monitoring the structure's condition. The issue of the characteristics of wooden structures destruction in the salty water of the Gulf of Finland is discussed. In particular, wood's physical and mechanical properties are analyzed during the long-term operation in water. The result of testing of small standard samples for different types of stress states is shown. Changes in the chemical composition of wood are identified. The change in the chemical composition of the material affecting its strength properties is described on the example of Fort Kronschlot crib foundation. It has been established that the process of diffusion, amplified by alternating wave loads, led to the washing of extractive substances, a decrease in potassium, and a lack of calcium in the cell walls of tracheids. The results of this research work may be useful in assessing the residual life of long-term wooden structures underwater and in predicting the restoration time for these structures more accurately.

Place of publishing:

Koszalin

Publisher:

Politechnika Koszalińska

Date:

2025

Type:

artykuł w czasopiśmie

Language:

eng

Is part of:

Rocznik Ochrona Środowiska. Vol. 27, s. 19-24

Rights:

Biblioteka Politechniki Koszalińskiej

Access rights:

internet

License:

Creative Commons BY-SA 4.0