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Title: Effect of TiO2 Addition on Mortars: Characterization and Photoactivity
Authors: Hernandez Rodriguez, María José 
Santana Rodríguez, Ricardo Javier 
Darias, R.
González Díaz, O. 
Pérez Luzardo, José Manuel 
Doña-Rodríguez, J.M. 
Pulido Melián, E. 
UNESCO Clasification: 330301 Tecnología de la catálisis
Keywords: Titanium-Dioxide
Photocatalytic Degradation
Microstructure, et al
Issue Date: 2019
Project: Hormigones Fotocatalíticos 
Eliminacion Fotocatalitica de Mezclas de Nox y Covs en Emisiones Gaseosas Con Ti02 y Oxidos Mixtos. 
Journal: Applied Sciences (Basel) 
Abstract: In this study, mortar specimens were prepared with a cement:sand:water ratio of 1:3:0.5, in accordance with standard EN196-1. Portland CEM I 52.5 R grey (G) and white (W) cements were used, together with normalised sand and distilled water. Different amounts of TiO2 photocatalyst were incorporated in the preparation of the mortar samples. The effect of the addition of TiO2 was studied on mechanical properties of the mortar and cement including compressive and flexural strength, consistency (the flow table test), setting time and carbonation. Characterization techniques, including thermogravimetry, mercury porosimetry and X-ray diffraction spectroscopy (XRD), were applied to study the physico-chemical properties of the mortars. It was shown that adding the photocatalyst to the mortar had no negative effect on its properties and could be used to accelerate the setting process. Specimen photoactivity with the incorporated photocatalyst was tested for NOx oxidation in different conditions of humidity (0% RH and 65% RH) and illumination (Vis or Vis/UV), with the results showing an important activity even under Vis radiation.
ISSN: 2076-3417
DOI: 10.3390/app9132598
Source: Applied Sciences-Basel [ISSN 2076-3417],v. 9 (13), 2598
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