Development and Utilization of New Geo-materials by the Reuse of Municipal Waste Ashes and Construction Waste Surplus

严格指出了城市生活垃圾焚烧复垦土地产生的二恶英和重金属对环境的污染。此外，有明粘土质量低、含水率高，再利用难度较大。利用专门设计的处理系统对长崎市和佐贺市的城市垃圾灰渣进行无害化处理，并对其力学和化学特性进行测试，以评价其回收利用的可能性。将城市垃圾焚烧灰土与有利克粘土混合应用于软土地基处理，通过数值模拟和离心机模型试验研究了软土地基的沉降抑制效果。论证了城市垃圾焚烧灰渣和建筑土作为表土稳定材料回收利用的可能性。

Environmental pollution caused by dioxin and heavy metal from the reclaimed land using the city municipal waste ashes is rigorously pointed out. In addition, the reuse of Ariake clay is difficult due to its low quality and high moisture content. How to recycling municipal waste ashes and soft clay is becoming an urgent problem.In this study, municipal waste ashes in Nagasaki city and Saga city are made harmless by using the specially designed processing system, and their mechanical and chemical characteristics are measured for evaluating the recycling possibility. A mixture of city trash destruction ash with the Ariake clay has been applied to the ground surface for the surface-soil stabilization of soft ground, and the effect of subsidence restraint has also been investigated based on the numerical simulations and the model experiments by using centrifuge model test. As the result, recycling possibility of the municipal waste ashes and the construction soil as the surface-soil stabilization material are demonstrated.