Print Email Facebook Twitter Potential application of MSWI bottom ash as substitute material in Portland cement concrete Title Potential application of MSWI bottom ash as substitute material in Portland cement concrete: Filler or binder Author Sun, Yubo (Student TU Delft) Chen, B. (TU Delft Materials and Environment) Zhang, Shizhe (TU Delft Materials and Environment) Blom, Kees (Gemeente Rotterdam) Lukovic, M. (TU Delft Concrete Structures) Ye, G. (TU Delft Materials and Environment) Contributor Ye, Guang (editor) Dong, Hua (editor) Liu, Jiaping (editor) Schlangen, Erik (editor) Miao, Changwen (editor) Date 2021 Abstract In recent years, the rapid industrialization and urbanization led to the explosive growth of municipal solid waste incineration (MSWI) bottom ashes (BA) production. However, most of them are directly landfilled, which not only brings environmental burden but also results in loss of potential resources. Present researches have proved that MSWI BA could be utilized as a replacement in Portland cement concrete. However, several drawbacks such as volume expansion, leaching behaviour, and relatively lower strength have been reported. In this study, as-received BA was pretreated to remove the metallic aluminium which is responsible for the hydrogen-induced expansion when blended in OPC concretes. Subsequently, the treated BA samples were used as a substitution for cement at the replacement level of 10%. Micronized sand (M300) was selected as reference materials to investigate the role of treated BA in blended cement system, either as filler or binder material. In the experimental program, the hydration process of different mixtures was monitored by isothermal calorimeter and hydration products were determined by X-ray diffraction (XRD) and Thermalgravimetric analysis (TGA). Results showed that the pretreatment effectively removed the metallic aluminum in BA and no severe expansion or strength decrement were detected. The treated BA showed limited reactivity comparing with Portland cement, however, it still worked better than micronized sand as a filler substitution. To reference this document use: http://resolver.tudelft.nl/uuid:77de14ad-91c3-4a86-8329-e8f55206ca15 Publisher Delft University of Technology ISBN 978-94-6366-422-6 Source 4th International Rilem Conference on Microstructure Related Durability of Cementitious Composites: Microdurability 2020 Event 4th International Rilem Conference on Microstructure Related Durability of Cementitious Composites, 2021-04-29 → 2021-05-27, Online, Delft, Netherlands Part of collection Institutional Repository Document type conference paper Rights © 2021 Yubo Sun, B. Chen, Shizhe Zhang, Kees Blom, M. Lukovic, G. Ye Files PDF Potential_application_of_ ... ncrete.pdf 1.53 MB Close viewer /islandora/object/uuid:77de14ad-91c3-4a86-8329-e8f55206ca15/datastream/OBJ/view