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The influence of physico-chemical properties of fly ash and CKD on strength generation of high-volume fly ash concrete

Sadique, MM and Coakley, E (2016) The influence of physico-chemical properties of fly ash and CKD on strength generation of high-volume fly ash concrete. Advances in Cement Research, 28 (9). pp. 595-605. ISSN 0951-7197

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Abstract

This paper presents a laboratory study on the use of cement kiln dust (CKD) as an activator of fly ash when used in high volumes within concrete. Two separate batches of fly ash and CKD were tested to assess the effect of material variability on binder properties and compressive strength gain. Ternary blends of fly ash (55-65%), CEM 1 (30%) and CKD (5-15%) and quaternary blends that included moderate amounts (15-18•5%) of ground granulated blast-furnace slag (GGBS) were prepared. Physico-chemical properties of individual binder materials were compared and concrete compressive strength was measured at 2 d, 7 d and 28 d. Ternary blends of 60% fly ash, 30% cement and 10% CKD resulted in moderate early age and 28 d strength and addition of GGBS enhanced strength significantly due to increased ettringite formation. Particle fineness, water demand and loss on ignition content of fly ash, and calcium oxide and sulfur trioxide content of CKD were found to be the main physico-chemical factors that influence compressive strength gain.

Item Type: Article
Additional Information: The final published version can be found at: http://www.icevirtuallibrary.com/toc/jadcr/current http://dx.doi.org/10.1680/jadcr.15.00103
Uncontrolled Keywords: 0905 Civil Engineering
Subjects: T Technology > TE Highway engineering. Roads and pavements
Divisions: Civil Engineering
Publisher: Thomas Telford (ICE Publishing)
Date Deposited: 27 Apr 2017 10:20
Last Modified: 07 Sep 2017 08:07
DOI or Identification number: 10.1680/jadcr.15.00103
URI: http://researchonline.ljmu.ac.uk/id/eprint/6309

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