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Amelioration of crushed brick-Lime composites using nano-additives

Theodoridou, M, Charalambous Elisavet, Maravelaki Pagona, Ioannou Ioannis

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Year 2016
Type of Item Peer-Reviewed Journal Publication
Bibliographic Citation M. Theodoridou, E. Charalambous, P. Maravelaki-Kalaitzaki and I. Ioannou, "Amelioration of crushed brick-Lime composites using nano-additives," Cement Concrete Comp., vol. 68, pp. 77-87, Apr. 2016. doi: 10.1016/j.cemconcomp.2016.02.009
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Crushed brick is widely known as a pozzolanic additive for composite building materials. However, crushed brick-lime composites usually show high porosity, low compressive strength and slow reaction kinetics. In this paper, we present multidisciplinary research on the amelioration of crushed brick-lime composites, using nanosilica (SiO2) and nanotitania (TiO2) as additives at 3% w/w of binder. The results suggest that despite the dominant effect of the crushed brick, nanosilica significantly improves the early-age properties of the composites, while nanotitania potentially increases their resistance against salt crystallization. Supplementary FTIR, DTA/TG and SEM analyses confirm the better hydration and carbonation evolution of lime composites with crushed brick and nano-additives.