Rammed earth blocks with improved multifunctional performance

Article

Porter, Hannah, Blake, Joshua, Dhami, Navdeep Kaur and Mukherjee, Abhijit. 2018. "Rammed earth blocks with improved multifunctional performance." Cement and Concrete Composites. 92, pp. 36-46. https://doi.org/10.1016/j.cemconcomp.2018.04.013
Article Title

Rammed earth blocks with improved multifunctional performance

ERA Journal ID21082
Article CategoryArticle
AuthorsPorter, Hannah (Author), Blake, Joshua (Author), Dhami, Navdeep Kaur (Author) and Mukherjee, Abhijit (Author)
Journal TitleCement and Concrete Composites
Journal Citation92, pp. 36-46
Number of Pages11
Year2018
PublisherElsevier
Place of PublicationUnited Kingdom
ISSN0958-9465
1873-393X
Digital Object Identifier (DOI)https://doi.org/10.1016/j.cemconcomp.2018.04.013
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0958946517309563
Abstract

Rammed earth is a traditional construction technology that has proven to be sustainable. This paper explores further improvement of its multifunctional performance by increasing the strength, reducing moisture permeation and increasing the thermal resistance. Surface application of microbial cementation was found to increase the strength by 25%. The water permeability and erosion of the blocks also reduced by 24% and 62% respectively, due to surface application of microbial cementation. The thermal test showed that addition of crumb rubber resulted in a temperature difference of around 30 °C even after 6 h. However, the addition of crumb rubber also reduced the strength. This research demonstrates that significant improvement of overall performance of rammed earth materials can be achieved through various treatments. However, the overall performance requirements are specific to the engineering application and synergistic and antagonistic interactions must be considered to obtain an optimal performance.

KeywordsBacteria; Bio cementation; Crumb rubber; Microbial calcite; Rammed earth; Stabilisation; Sustainability
ANZSRC Field of Research 2020400502. Civil geotechnical engineering
400505. Construction materials
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Byline AffiliationsCurtin University
Institution of OriginUniversity of Southern Queensland
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