Leaching characteristics of biomass ash-based binder in neutral and acidic media
Name
Leachingcharacteristicsofbiomassash-basedbinderinneutralandacidicmedia_ElsevierEnhancedReader.pdf
Description
Accepted version
Size
8.37 MB
Format
Adobe PDF
Checksum (MD5)
709dea7e4302cf26e7f01b053ad2ff28
Author(s)
Chaunsali, Piyush
Uvegi, Hugo
Traynor, Bryan
Olivetti, Elsa
Date Issued
July 2019
Journal
Cement and Concrete Composites
Publisher
Elsevier BV
Citation
Chaunsali, Piyush et al. "Leaching characteristics of biomass ash-based binder in neutral and acidic media." Cement and Concrete Composites 100 (July 2019) © 2019 Elsevier Ltd
Version
Author's final manuscript
Abstract
Biomass ash results from the combustion of agricultural residues, which, in many developing countries, are a primary source of power generation for small and medium size industries. This study focuses on the performance of a binder synthesized from an Indian biomass ash, Indo-Gangetic clay, hydrated lime, and aqueous 1M NaOH solution. To measure the extent of leaching and its impact on physicochemical properties, the biomass ash binder in powder form (<45 μm size) was exposed to two different leaching media: deionized water and 0.1M HNO₃ at two different solution-to-sample ratios (by wt.) of 10 and 100. Sodium leaching was found to be prominent in the biomass ash binder irrespective of leaching medium and solution-to-sample ratio. However, calcium leaching was significantly higher in 0.1M HNO₃ than in deionized water. Calcium silicate hydrate present in the biomass ash binder was found to be less chemically stable in 0.1M HNO₃, exhibiting complete calcium leaching at a solution-to-sample ratio of 100. Furthermore, significant leaching of calcium in 0.1M HNO₃ solution resulted in phase modification of calcium silicate hydrate, the main reaction product of the biomass ash binder.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.cemconcomp.2019.04.001
