RECYCLING MOLTEN SLAG FROM WASTE TO CONCRETE
PRODUCTS AND CONSTRUCTION MATERIALS IN JAPAN
-A CASE STUDY REPORT
29th Our World in Concrete and Structures (OWICs) - 2004
Hosokawa*, Kitasato University, Japan
M. Shoya, Hachinohe Institute of Technology, Japan
Y. Tsukinaga, Hachinohe Institute of Technology, Japan
H. Aba, Hachinohe Institute of Technology, Japan
H. Yamamichi, Hachinohe Institute of Technology, Japan
T. Sugawara, Hachinohe National College of Technology, Japan
Recycle, Molten slag, Municipal waste, Concrete products, Construction materials
The objective of this paper is to introduce concrete products and construction
materials as the effective utilization of molten flag from municipal waste directly or waste incineration ash in Japan, but not from the industrial waste.
The disposal of incineration ash from municipal waste is one of serious social
problems in and near the large cities and towns, because the landfill site of the disposal became rapidly narrow and has the limited life. Unfortunately, the industrial wastes damped unlawfully are sometimes found out and then become a large scale problem. Although the solution of these problems is required rapidly, it is important to recycle the waste into the useful resources.
Concrete products manufactured with molten slag from incineration ash and
directly from municipal refuse were confirmed to keep the enough strength and durability and to check no difference of concrete surface appearance. The asphalt concrete material mixing with molten slag as one of construction material samples were manufactured and checked the satisfied properties for asphalt road pavement.
In Japan, recycling molten slag has been recently developed to manufacture
concrete products and construction materials, e.g., interlocking concrete blocks for sidewalk and road pavement, concrete flume for drainage, concrete gutters and curbs for road construction, asphalt concrete materials and roadbed materials for road pavement and so on. We would like to introduce them and also the recent tackles of recycling molten slag for the public works.