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Differentiating the physical and chemical effects of supplementary cementitious materials in cement mortars

Author(s): Manu Santhanam, Hemalatha M S
Paper category: Proceedings
Book title: Proceedings of the International RILEM Conference
Materials, Systems and Structures in Civil Engineering 2016
Segment on Concrete with Supplementary Cementitious Materials
Editor(s): Ole M. Jensen, Konstantin Kovler and Nele De Belie
e-ISBN: 978-2-35158-179-7
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 246-255
Total Pages: 10
Language : English

Abstract: Supplementary Cementitious Materials (SCMs) influence the properties of fresh and hardened concrete. The incorporation of SCMs, either as a replacement of the cement or as an addition to the cementitious matrix, leads to an improvement in the strength and durability of concrete. While the pozzolanic reaction of the reactive siliceous components in the SCM has a large role to play in the enhancement of the properties, the secondary filler role of the SCMs can also be significant. Conventional reactivity determination for SCMs does not address the issue of understanding both physical and chemical synergies in the cementitious system, as a result of which the potential of the SCM is not fully utilized. This paper describes an experimental study on the differentiation of the physical and chemical effects of the SCM. The different SCMs used were Type ‘F’ and Type ‘C’ fly ash, Ground granulated blast furnace slag, and Quartz powder. The compressive strength and water sorptivity were assessed after 28 days. The results indicate that the physical effect can be specifically outlined by the understanding of the particle packing characteristics of the cement matrix, which helps in providing the contribution in the overall effect of the SCM.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00

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