Study on the feasibility of municipal solid waste incineration bottom ash reutilization

The municipal solid waste incineration(MSWI) bottom ash was sampled in Tianjin MSW incineration power plant to investigate the engineering and environmental properties of different sized bottom ash.The MSWI bottom ash was applied as aggregate to prepare construction stick specimen,and possible influences of the special components contained in bottom ash on engineering properties of the recycled construction material were analyzed.The results showed that MSWI bottom ash had similar properties to natural construction aggregates,such as particle size distribution,major elements and theirconcentrations,sand equivalent,compaction density.Meanwhile,reutilization of the bottom ash was friendly to environment.However,a few cracks in the construction stick specimen were found during testing period.The factors influencing the cracks in the stick was analyzed in terms of the specific components of the bottom ash and other physical properties.Finally,method and technology of improving the properties of the recycled bottom ash aggregate were proposed.