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The disposal of Municipal Solid Waste incineration residue (MSW ashes) is in very critical condition due to the tightness of landfill spaces in Japan. As relieves to this predicament, many technologies have been developed to prolong the lifetime of landfill spaces. Ecocement system and Ash rinsing system, typical of those technologies, were developed to utilize as a raw material of cement. Understanding the characteristics of MSW ashes is very important to maintain the quality of cement and to control the cement manufacturing process. In this study, a variety of MSW ashes were analyzed for the peurpos of promoting their utilization as an alternative cement raw material. These analyses were carried out for 237 samples of MSW ashes collected from 142 incineration facilities in Japan. As a result, although principal chemical compositions of MSW ashes vary due to which type of incineration process they came from, they can be used as a cement raw material in all cases. Fly ash with higher compressibility requires bridging prevention measures. Making a best use of these results, Ecocement system and Ash rinsing system were established and started operation.

Characterization of MSW incineration residue as a raw material for cement for the establishment of Zero Emission in Japan.