Incorporation of titanium dioxide nanoparticles in mortars - Influence of microstructure in the hardened state properties and photocatalytic activity
authors Lucas, SS; Ferreira, VM; de Aguiar, JLB
nationality International
journal CEMENT AND CONCRETE RESEARCH
author keywords Mortar; Microstructure; Mechanical Properties; Cement
keywords INDOOR AIR-QUALITY; HETEROGENEOUS PHOTOCATALYSIS; BUILDING-MATERIALS; CONCRETE PAVEMENT; TIO2; OXIDATION; DEGRADATION; PRODUCTS; WATER; PHOTOACTIVITY
abstract The environmental pollution in urban areas is one of the causes for poor indoor air quality in buildings, particularly in suburban areas. The development of photocatalytic construction materials can contribute to clean the air and improve sustainability levels. Previous studies have focused mainly in cement and concrete materials, disregarding the potential application in historic buildings. In this work, a photocatalytic additive (titanium dioxide) was added to mortars prepared with aerial lime, cement and gypsum binders. The main goal was to study the way that microstructural changes affect the photocatalytic efficiency. The photocatalytic activity was determined using a reactor developed to assess the degradation rate with a common urban pollutant, NOR. The laboratory results show that all the compositions tested exhibited high photocatalytic efficiency. It was demonstrated that photocatalytic mortars can be applied in new and old buildings, because the nanoadditives do not compromise the mortar hardened state properties. (C) 2012 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0008-8846
year published 2013
volume 43
beginning page 112
ending page 120
digital object identifier (doi) 10.1016/j.cemconres.2012.09.007
web of science category Construction & Building Technology; Materials Science, Multidisciplinary
subject category Construction & Building Technology; Materials Science
unique article identifier WOS:000313850200011
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journal analysis (jcr 2017):
journal impact factor 5.430
5 year journal impact factor 5.703
category normalized journal impact factor percentile 90.808
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