Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Development of accelerated processing techniques for cement-bonded wood particleboard
AbstractThe potential for substantial acceleration of the curing process of cement-bonded wood particleboard by injection of diluted carbon dioxide gas was investigated experimentally. Milled particles of softwood and hardwood were used as reinforcement in cement boards processed under pressure. Injection of pure as well as diluted carbon dioxide gas greatly reduced (by two orders of magnitude) the press time required to yield dimensionally stable products of sufficient strength for initial handling. Diluted carbon dioxide gas (about 25% CO2 concentration in air) yielded immediate flexural attributes (upon press release) which were competitive against those obtained with pure carbon dioxide gas. It is hypothesized that dilution of CO2 gas lowers the excess rate of reactions, thereby controlling the rise in temperature and allowing for more thorough penetration (and reaction) of CO2 gas. These benefits seem to compensate for the reduced rate of reactions of diluted CO2 gas. Competitive immediate performance characteristics are thus achieved with diluted CO2 gas with in spite of the lower CO2 gas consumption (and thus lower processing costs).
Development of accelerated processing techniques for cement-bonded wood particleboard
AbstractThe potential for substantial acceleration of the curing process of cement-bonded wood particleboard by injection of diluted carbon dioxide gas was investigated experimentally. Milled particles of softwood and hardwood were used as reinforcement in cement boards processed under pressure. Injection of pure as well as diluted carbon dioxide gas greatly reduced (by two orders of magnitude) the press time required to yield dimensionally stable products of sufficient strength for initial handling. Diluted carbon dioxide gas (about 25% CO2 concentration in air) yielded immediate flexural attributes (upon press release) which were competitive against those obtained with pure carbon dioxide gas. It is hypothesized that dilution of CO2 gas lowers the excess rate of reactions, thereby controlling the rise in temperature and allowing for more thorough penetration (and reaction) of CO2 gas. These benefits seem to compensate for the reduced rate of reactions of diluted CO2 gas. Competitive immediate performance characteristics are thus achieved with diluted CO2 gas with in spite of the lower CO2 gas consumption (and thus lower processing costs).
Development of accelerated processing techniques for cement-bonded wood particleboard
Soroushian, Parviz (Autor:in) / Won, Jong-Pil (Autor:in) / Chowdhury, Habibur (Autor:in) / Nossoni, Ali (Autor:in)
Cement and Concrete Composites ; 25 ; 721-727
21.06.2002
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Development of accelerated processing techniques for cement-bonded wood particleboard
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