Title: Recent Trends in Recycling of Concrete Waste and Use of Recycled Aggregate Concrete in Japan

Author(s): Y. Kasai

Publication: Symposium Paper

Volume: 219

Issue:

Appears on pages(s): 11-34

Keywords: concrete waste; construction waste; Japan; recycled aggregate; recycled concrete

DOI: 10.14359/13136

Date: 3/1/2004

Abstract:
This paper addresses first the generation of construction waste in Japan, the extent of recycling, and the shortage of landfill capacity. Second, it chronicles the trend of recycling concrete rubble from 1970 until today. Third, it discusses methods of manufacturing recycled concrete aggregate and introduces the recently developed equipment and methods to produce good aggregate for concrete. Fourth, the problems associated with the use of recycled concrete aggregate are mentioned. Also, the utilization of concrete fines, eco-concrete, and slurries from ready-mix concrete plants are addressed. Land in Japan is very scarce and resources limited. These conditions are similar to those faced by Europeans and Scandinavians. Therefore, this paper should be of interest to those countries and their efforts to build closed-loop material cycles.