Synergistic chemical and microbial cementation for stabilization of aggregates

Article

Porter, Hannah, Dhami, Navdeep Kaur and Mukherjee, Abhijit. 2017. "Synergistic chemical and microbial cementation for stabilization of aggregates." Cement and Concrete Composites. 83, pp. 160-170. https://doi.org/10.1016/j.cemconcomp.2017.07.015

Article Title	Synergistic chemical and microbial cementation for stabilization of aggregates
ERA Journal ID	21082
Article Category	Article
Authors	Porter, Hannah (Author), Dhami, Navdeep Kaur (Author) and Mukherjee, Abhijit (Author)
Journal Title	Cement and Concrete Composites
Journal Citation	83, pp. 160-170
Number of Pages	11
Year	2017
Publisher	Elsevier
Place of Publication	United Kingdom
ISSN	0958-9465
	1873-393X
Digital Object Identifier (DOI)	https://doi.org/10.1016/j.cemconcomp.2017.07.015
Web Address (URL)	https://www.sciencedirect.com/science/article/pii/S0958946517301154
Abstract	The use of Portland cement as a stabilizer of granular materials such as sand, is comparable to that in concrete. Although a relatively small percentage of cement is used for a stabilized soil system, the consumption of cement in Australian road bases and mining backfills is only second to the concrete industry. Conventionally, Portland cement is used as a binder for these applications. This paper explores low embodied energy alternative binders such as geopolymers and microbial cementation. A combination of the chemical and microbial binders has been attempted. The performance of the stabilized systems in terms of compressive strength, elastic modulus and water absorption was determined. It is noted that the chemical and the microbial cementation work synergistically. A microstructural investigation has been performed to reveal the synergistic nature of the two binding systems. The new technology is able to significantly reduce the embodied energy and emission of stabilized granular materials.
Keywords	Bacteria; Cement stabilization; Geopolymer; Maintenance; Microbial calcite; Road bases; Sustainability
ANZSRC Field of Research 2020	400502. Civil geotechnical engineering
	401699. Materials engineering not elsewhere classified
	400505. Construction materials
Public Notes	Files associated with this item cannot be displayed due to copyright restrictions.
Byline Affiliations	Curtin University
Institution of Origin	University of Southern Queensland

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