Analysis of the Influence of Adverse Climatic Effects on the Strength Characteristics of Fiberboards

The article presents the results of a full-scale experimental study and subsequent analysis of the impact of adverse climatic influences on the strength characteristics of fiberboard. In this study, the following exposures were selected as unfavorable climatic factors: alternating freeze-thaw, ultraviolet irradiation and exposure to elevated temperatures. The following are accepted as evaluation characteristics of strength properties: Brinell hardness and transverse bending strength. The relevance of the work lies in the need to identify the influence of external factors on the properties of fiberboards and take into account the results obtained when predicting long-term strength. From a theoretical point of view, the value of this work lies in demonstrating a method for determining the strength characteristics of fiberboard exposed to harmful climatic influences. From a practical point of view, this work contains experimental results that allow us to judge the strength characteristics of fiberboard. It has been proven that UV irradiation and thermal aging cause destruction of the binder between filler particles, and moisture is harmful to the filler. As a result, based on the data obtained, it was determined that it is not recommended to use fiberboard inside and outside structures that are exposed to the adverse effects of water at transition temperatures.