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Mix Design and Selected Properties of Concrete Containing Condensed Silica Fume

Magee, Bryan and Alexander, Mark (1999) Mix Design and Selected Properties of Concrete Containing Condensed Silica Fume. Journal of South African Institution of Civil Engineers, 41 . pp. 12-18. [Journal article]

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URL: https://journals.co.za/content/civileng/41/3/EJC26870


The paper describes a study carried out to investigate the use of South African condensed silica fume as a Portland cement replacement material in structural concrete. Aspects dealt with in the paper are fresh properties, strength development and the development of a mix design method. Results indicated a significant effect by condensed silica fume on all concrete properties. Concrete workability was found to reduce dramatically with increasing dosages of condensed silica fume. However, rates of workability decrease were found to be test-dependent. Reduced quantities of bleeding were recorded for concrete with increasing condensed silica fume replacement, and concrete strength development was greatly improved. A unique mix design method, capable of proportioning concrete with a range of condensed silica fume replacements for chosen values of 28-day strength and taking into account the water/binder ratio and dosage of condensed silica fume used, is proposed. Consideration is given to the practical implications of the work for concrete specifiers and producers.

Item Type:Journal article
Keywords:silica fume, mix design, concrete, performance, waste materials
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Studies Allied to Built Environment Research (SABER)
ID Code:36907
Deposited By: Dr Bryan Magee
Deposited On:15 Feb 2017 13:45
Last Modified:17 Oct 2017 16:27

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