Experimental investigation on effects of calcined bentonite on fresh, strength and durability properties of sustainable self-compacting concrete

El-Abidine Laidani, Zine and Benabed, Benchaa and Abousnina, Rajab and Gueddouda, M. Kamal and Kadri, El-Hadj (2020) Experimental investigation on effects of calcined bentonite on fresh, strength and durability properties of sustainable self-compacting concrete. Construction and Building Materials, 230:117062. pp. 1-11. ISSN 0950-0618


Abstract

With the current focus on sustainable development in the civil engineering field, it is necessary to develop construction and building materials with reasonable costs and low environmental impacts in order to reduce CO2 emissions during the production of concrete, and from the cement industry as a whole. This research studies the effect of using calcined bentonite (CB) as partial replacement of Ordinary Portland Cement (OPC) on the sustainability of self-compacting concrete (SCC). The cement in SCC mixes has been replaced with two different types of CB at 0, 5, 10, 15, 20, 25 and 30% by weight. Slump flow, V-funnel flow time, L-box test and sieve stability tests are performed to evaluate the fresh properties of SCC mixtures. Various tests are used to assess the performance of SCC mixtures in hardened states, such as compressive strength, porosity accessible to water, chloride-ions penetration and gas permeability. The results showed that the use of CB in SCC mixes reduced the fresh properties of SCC and the slump flows, flow times, and segregation tests are good enough for SCC production. At a hardened state, SCC with 10–15% of CB had a higher compressive strength up to 90 days, as well as improved porosity, chloride-ions penetration and gas permeability properties. These results indicate that a CB solution will reduce CO2 emissions and make durable and eco-friendly SCC at a low cost.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 18 Jun 2020 23:17
Last Modified: 26 Jul 2020 23:57
Uncontrolled Keywords: self-compacting concrete; calcined bentonite; fresh properties; strength; durability; porosity; chloride-ions penetration; gas permeability
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Socio-Economic Objectives (2008): D Environment > 96 Environment > 9606 Environmental and Natural Resource Evaluation > 960603 Environmental Lifecycle Assessment
Identification Number or DOI: https://doi.org/10.1016/j.conbuildmat.2019.117062
URI: http://eprints.usq.edu.au/id/eprint/37881

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