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Optimization of fly ash based soil stabilization using secondary admixtures for sustainable road construction
journal contribution
posted on 2021-04-20, 00:00 authored by Rintu Renjith, Dilan Robert, Sujeeva Setunge, Susanga CostaSusanga Costa, Abbas MohajeraniFly ash, despite being a suitable cement substitute, is only utilized at a low rate in engineering applications, hence not contributing to its current waste mitigation efforts. Under a five-part comprehensive testing program, this study investigated the efficiency of fly ash stabilized soil when combined with secondary additives (enzymes and lime). Part one explored the suitable fly ash and enzyme dosages. Parts two and three assessed the effect of time and lime on enzymatic fly ash stabilized soil, respectively. Part four unveiled the mechanism of stabilization by secondary additives. Part five analyzed the significance and benefits of these additives in pavement stabilization. The study found that the efficiency of fly ash stabilization can be significantly improved when combined with 1% of 1:500 diluted enzyme. Addition of 2% lime has also supplemented with improved load-bearing capacity. Benefits of this research include enhanced fly ash waste mitigation, saving natural resources used as wearing course materials, and development of an alternative solution for pavement stabilization.
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Journal
Journal of Cleaner ProductionVolume
294Article number
126264Publisher
Elsevier BVLocation
Amsterdam, NetherlandsPublisher DOI
ISSN
0959-6526Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2021, ElsevierUsage metrics
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