Journal of Environmental Conservation Engineering

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Powdered newspaper waste was solidified by the steam press method as an eco-technique. Boards of old newspaper were evaluated based on the bending strength, the detachment strength, the threshold of screws, and the expansion rate in water for 24 hours. The sections of boards were observed by Scanning Electron Microscope. When the conditions were solidified at temperature 120 and pressure of 3.0MPa with the sodium silicate diluted two times by water, the highest bending strength is obtained at 60.0MPa. With the temperature range from 100℃-180℃and pressure of 3.0MPa with the sodium silicate diluted two times by water, the detachment strength and the threshold of screws were obtained at about 0.65MPa and about 520N, respectively. When the temperature was increased from 100℃ to 200℃, the expansion rate was decreased from 36% to 26%.

Itʼs concluded that in order to obtain the bending strength, the detachment strength and the threshold of screws as equal or better to those of the commercial boards, the steam pressing method was an effective eco-technique for the solidification of paper waste.

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