A study on reuse of municipal waste ashes as construction materials

严厉地指出了城市生活垃圾灰复垦后产生的二恶英和重金属对环境的污染。此外，有明粘土的质量低，含水率高，难以重复利用。如何对城市废灰和软土进行资源化利用已成为一个亟待解决的问题。本研究采用专门设计的处理系统，对长崎市和佐贺市的生活垃圾灰进行无害化处理，并对其力学和化学特性进行测定，评价其回收利用的可能性。将城市垃圾破坏灰与有明黏土混合材料应用于软土地基的地表稳定，并通过数值模拟和离心模型试验研究了其抑制沉降的效果。论证了城市废灰和建筑土作为地表土壤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.