Effect of nano-CuO and fly ash on the properties of self-compacting mortar

Mehrinejad Khotbehsara, Mojdeh and Mohseni, Ehsan and Yazdi, Mohammad Ali and Sarker, Prabir and Ranjbar, Malek Mohammad (2015) Effect of nano-CuO and fly ash on the properties of self-compacting mortar. Construction and Building Materials, 94. pp. 758-766. ISSN 0950-0618

Abstract

This paper presents the fresh and hardened properties of self-compacting mortar (SCM) incorporating
nano-CuO (NC) and fly ash (FA). CuO nanoparticles at the rates of 1%, 2%, 3% and 4%, and low-calcium
fly ash at the rates of 20%, 25%, and 30% of the binder by weight were considered. Mini slump flow diameter
and mini V-funnel flow time tests were conducted to determine the rheological properties of SCMs
incorporating fly ash and nano-CuO. Compressive strength was determined at the ages of 7 days as an
early age, 28 days as the standard age and 90 days as a late age. Water absorption, electrical resistivity
and rapid chloride permeability tests (RCPT) were also performed to determine the durability properties.
The results showed significant improvement in the mechanical properties of the samples incorporating
the replacement of cement with a combination of 3% CuO nanoparticles and 25% FA. Chloride permeability
and electrical resistivity of the FA blended mixtures improved with the increase of nano-CuO content
up to 4%. The SEM micrographs indicated more packed pore structure of the SCMs containing nanoparticles
which could lead to increasing the strength and durability of specimens.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 13 Jul 2017 00:01
Last Modified: 13 Jul 2017 00:01
Uncontrolled Keywords: compressive strength; CuO nanoparticles; durability; fly ash; self-compacting mortar; workability; RCPT; electrical resistivity
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
Identification Number or DOI: 10.1016/j.conbuildmat.2015.07.063
URI: http://eprints.usq.edu.au/id/eprint/32721

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