RECYCLING SYSTEM OF CONCRETE WASTE INCURRED FROM BUILDING DEMOLITION : Production of recycled aggregate concrete by staged mixing

Abstract

In this study, an original production method of recycled aggregate concrete has been proposed for the case when it is difficult for ready-mixed concrete plant to produce recycled aggregate concrete. The method proposed by the authors is that recycled coarse aggregate is mixed on-site, by using track agitator, with other material; this has been mixed in the ready-mixed concrete plant in a near city and transported to the site. In this paper, it has been confirmed by the feasibility study that this method is effective in environmental impact and cost effectiveness. Furthermore, based on the results of duplicate experiment, the factors in production that have influence on the quality of recycled concrete have been recognized. And finally this method has been concretely determined by the data of real-scale experiment.