Changes in Some Mechanical and Physical Properties and Anatomical Structure of Spruce and Larch Wood after Fire-Retardant Treatment
Chun-Won Kang,
Ming-Yu Wen,
Hee-Jun Park,
Ho-Yang Kang,
Seog-Goo Kang,
Junji Matsumura
Affiliations
Chun-Won Kang
Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University, Jeonju561-756, Korea; Korea, Republic Of
Ming-Yu Wen
Wood Material Science and Engineering Key Laboratory, Beihua University; China
Hee-Jun Park
Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University, Jeonju561-756, Korea; Korea, Republic Of
Ho-Yang Kang
Department of Bio-based Materials, Chungnam National University, Daejeon 305-764, Korea; Korea, Republic Of
Seog-Goo Kang
Department of Bio-based Materials, Chungnam National University, Daejeon 305-764, Korea; Korea, Republic Of
Junji Matsumura
Division of Sustainable Bioresources Science, Department of Agro-environmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka 812-8581, Japan; Japan
Changes in the physical and mechanical properties and anatomical structures of spruce (Picea) and larch (Larix) specimens before and after fire-retardant impregnation were studied. Results indicated that the static modulus of elasticity (MOE), dynamic modulus of elasticity (DMOE), and the Brinell hardness of the specimens decreased for both wood species upon post-treatment. This could be accounted for by the degradation of hemicelluloses by the phosphorus-based compound, the minute cracks in the latewood cell wall, and the enlarged width of the cell lumen of the specimen resulting from the vacuum-pressure treatment. However, the decreased ratio of the MOR and DMOE to density contributed to lower sound transmission, which is expected to be important in a housing environment.
