Effects of mineral admixtures on mechanical and thermal properties of magnesium cement-based composites

Author(s): B. W. Xu, Z. J. Li, H. G. Zhu
Paper category: Proceedings
Book title: Proceedings of the Seventh International Conference on Concrete under Severe Conditions – Environment and Loading
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 886-899
Total Pages: 14
Language : English

Abstract: In this study, mineral admixtures including silica fume (SF), metakaolin (MK) and cenosphere (CS) are incorporated into magnesium cement-based composites for improving their mechanical and thermal insulation properties. Effects of SF, MK and CS on density, compressive strength, water resistance and thermal conductivity of the composites are systematically studied. The experimental results show that the incorporation of SF/MK/CS, at replacement levels of 5%, 15% and 30%, reduces the density, compressive strength and thermal conductivity of the composites. On the other hand, the incorporation of SF/MK/CS clearly improves the water resistance property of the composites. Among them, CS demonstrates the highest reduction effect on density, compressive strength and thermal conductivity of the composites, and the best improvement effect on water resistance property. It suggests that magnesium cement-based composites with incorporation of CS can be potentially used as a lightweight thermal insulation building material.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00