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Micro-durability of SCC mixtures containing limestone dust and natural pozzolan

Author(s): G. Fares, A. Al-Negheimish, M.I. Khan, R. Al-Zaid and A. Alhozaimy
Paper category: conference
Book title: Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. van Breugel, Wei Sun and Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Publication year: 2012
Pages: 309 - 316
Total Pages: 8
Language: English

Abstract: Cement, water, fine and coarse aggregate are the most controlling parameters in conventional and SCC mix design and greatly influence the long-term micro-durability of concrete. The presence of an optimized dosage of superplasticizer and additives are required for successful SCC mixes. Two SCC mix designs with different additives such as limestone dust and natural pozzolan as 20% partial replacement of the cement were cast under dry and hot conditions and investigated. The effect of additives on the pore-size refinement and microstructural composition with respect to the control mix was studied. The hydration development of SCC mixes with different additives cast under dry and hot conditions was also assessed at 1 year. SEM- EDS analysis was used to evaluate the relative compactness of calcium silicate hydrate (C-S-H) in control and binary mixes. The effect of additives on the pore-size distribution in each cementitious matrix was studied using MIP technique. Finally, the relation among the micro-durability parameters and the long-term strength was established.
Key words: SCC, Microstructural composition, Pore-size refinement

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00

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