DEVELOPMENT ON MATERIAL OF MAKING TO WARM-MIX-ASPHALT USING ARTIFICIAL ZEOLITE

Although there is a technology for producing warm-mix asphalt mixtures, which reduces environmental load, the quality of asphalt pavement has not yet been established. The authors investigate the warm-mix material, which forms fine foam in the asphalt by adding zeolite to the asphalt, by focusing on the crystalline void and ion-exchange capacity among chemical and physical characteristics of zeolite. In this study, research and development were carried out on an add-in warm-mix material whose major component was an artificial zeolite that can be produced by converting the paper sludge ash discharged from the paper manufacturing industry. A laboratory experiment and a manufacturing experiment at the plant were performed on the technology for producing warm-mix-asphalt mixtures by the prototype add-in warm-mix material. It is confirmed to be able to construct asphalt pavement by adding the warm-mix-asphalt mixture developed in this study under the condition of decreasing at 30°C more than a usual mixing temperature. アスファルト混合物製造において，環境負荷を低減する技術として中温化アスファルト混合物製造技術がある．そこで我々は，アスファルトに微細発泡を発生させる中温化用添加材について検討を行った．本研究開発は，人工ゼオライトが持つ結晶空隙によりアスファルト中に微細発泡する特性に着目した．使用する人工ゼオライトは，製紙業界から排出される製紙スラッジ焼却灰から転換製造できるものを対象として中温化用添加材の開発を行った．これにより，さらなる環境負荷の低減に繋がる．また，本論文では，試作した中温化用アスファルト混合物用添加材による室内実験ならびにプラント製造実験を行った．本実験で得られた結果より，混合温度を30℃低下可能な人工ゼオライトを用いた中温化材の性能を確認した．