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    Volume 49, Issue 4 (July 2021)

    Special Issue Paper

    Development of a Thermo-Hydro-Mechanical Device for Wood Densification Adaptable to Universal Testing Machines and Its Evaluation in a Tropical Species

    (Received 21 October 2018; accepted 5 July 2019)

    Published Online: 2021

    CODEN: JTEVAB

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    Abstract

    There is considerable interest in the development of thermo-hydro-mechanical (THM) treatments to increase the density of low-density woods. However, the development of processes for improving the properties of low-density woods in regions with lower investments in investigations and development, such as tropical areas, is often limited by the equipment and infrastructure constraints. The aim of this work is to outline the development and construction of an inexpensive THM densification device (THM device) that controls the application of heat, load, and steam, by adapting an accessory to a 60-Mg universal testing machine (UTM). The THM device was evaluated using the Vochysia guatemalensis wood (tropical species). The inexpensive densification THM device uses steaming, temperature, and compression and can be adaptable to a 60-Mg-capacity UTM. It also allowed us to successfully conduct the densification process on 20 by 70 by 300 mm wood samples of a low-density tropical species. However, there were some drawbacks discovered: for example, the steam application, pressure, and temperatures were controlled independently, which was not convenient. It would be more convenient to concentrate them in a single control unit. Additionally, a high variation was observed in the compression and stabilization thickness.

    Author Information:

    Tenorio, Carolina
    Escuela de Ingeniería Forestal, Instituto Tecnológico de Costa Rica, Cartago,

    Moya, Roger
    Escuela de Ingeniería Forestal, Instituto Tecnológico de Costa Rica, Cartago,


    Stock #: JTE20180760

    ISSN:0090-3973

    DOI: 10.1520/JTE20180760

    Author
    Title Development of a Thermo-Hydro-Mechanical Device for Wood Densification Adaptable to Universal Testing Machines and Its Evaluation in a Tropical Species
    Symposium ,
    Committee D07