The role of water-treated municipal solid waste incineration (MSWI) bottom ash in microstructure formation and strength development of blended cement pastes

Title

The role of water-treated municipal solid waste incineration (MSWI) bottom ash in microstructure formation and strength development of blended cement pastes

 Author

Chen, B. (TU Delft Materials and Environment)
Ye, G. (TU Delft Materials and Environment; Universiteit Gent) ORCID 0000-0001-8566-3863

 Date

2024

 Abstract

This research explored the microstructure formation and strength development of blended cement pastes prepared with municipal solid waste incineration (MSWI) bottom ash. A new sample preparation approach involving water treatment of MSWI bottom ash was developed to prevent sample cracking caused by the presence of metallic aluminum (Al) in bottom ash. The result showed that ions released during water treatment of MSWI bottom ash delayed cement hydration but promoted ettringite formation in blended cement pastes during the first day. Due to water treatment, the compressive strength of MSWI bottom ash blended cement paste increased to a level similar to that of Class F coal fly blended cement paste after 28 days. Blending water-treated MSWI bottom ash (WMBA) with cement promoted clinker hydration at later stages. The reaction products of WMBA in blended cement system were C-S-H gel and sodicgedrite, which contributed to strength development by filling the capillary pores.


 Subject

Blended cement
Hydration
Municipal solid waste incineration bottom ash
Supplementary cementitious materials
Water treatment

 To reference this document use:

http://resolver.tudelft.nl/uuid:7664983e-1c4f-4488-ae8b-38cc4e019108

 DOI

https://doi.org/10.1016/j.cemconres.2024.107440

 ISSN

0008-8846

 Source

Cement and Concrete Research, 178

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2024 B. Chen, G. Ye
Files
PDF 1-s2.0-S0008884624000218-main.pdf 21.3 MB
Close viewer