Effect of TiO<sub>2</sub> Addition on Mortars: Characterization and Photoactivity
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 TiO<sub>2</sub> photocatal...
Main Authors: | , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-06-01
|
Series: | Applied Sciences |
Subjects: | |
Online Access: | https://www.mdpi.com/2076-3417/9/13/2598 |
id |
doaj-0789d116e6ab4113b6c8159f12113f1b |
---|---|
record_format |
Article |
spelling |
doaj-0789d116e6ab4113b6c8159f12113f1b2020-11-25T01:49:48ZengMDPI AGApplied Sciences2076-34172019-06-01913259810.3390/app9132598app9132598Effect of TiO<sub>2</sub> Addition on Mortars: Characterization and PhotoactivityM. J. Hernández-Rodríguez0R. Santana Rodríguez1R. Darias2O. González Díaz3J. M. Pérez Luzardo4J. M. Doña Rodríguez5E. Pulido Melián6Grupo de Fotocatálisis y Espectroscopia para Aplicaciones Medioambientales (FEAM, Unidad Asociada al CSIC), Dpto. de Química, Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, SpainDepartamento de Construcción Arquitectónica (Materiales Ecoestructurales), Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, SpainDepartamento de Construcción Arquitectónica (Materiales Ecoestructurales), Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, SpainGrupo de Fotocatálisis y Espectroscopia para Aplicaciones Medioambientales (FEAM, Unidad Asociada al CSIC), Dpto. de Química, Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, SpainDepartamento de Construcción Arquitectónica (Materiales Ecoestructurales), Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, SpainGrupo de Fotocatálisis y Espectroscopia para Aplicaciones Medioambientales (FEAM, Unidad Asociada al CSIC), Dpto. de Química, Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, SpainGrupo de Fotocatálisis y Espectroscopia para Aplicaciones Medioambientales (FEAM, Unidad Asociada al CSIC), Dpto. de Química, Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, SpainIn 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 TiO<sub>2</sub> photocatalyst were incorporated in the preparation of the mortar samples. The effect of the addition of TiO<sub>2</sub> 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.https://www.mdpi.com/2076-3417/9/13/2598mortarcementTiO<sub>2</sub>NOxphotocatalysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. J. Hernández-Rodríguez R. Santana Rodríguez R. Darias O. González Díaz J. M. Pérez Luzardo J. M. Doña Rodríguez E. Pulido Melián |
spellingShingle |
M. J. Hernández-Rodríguez R. Santana Rodríguez R. Darias O. González Díaz J. M. Pérez Luzardo J. M. Doña Rodríguez E. Pulido Melián Effect of TiO<sub>2</sub> Addition on Mortars: Characterization and Photoactivity Applied Sciences mortar cement TiO<sub>2</sub> NOx photocatalysis |
author_facet |
M. J. Hernández-Rodríguez R. Santana Rodríguez R. Darias O. González Díaz J. M. Pérez Luzardo J. M. Doña Rodríguez E. Pulido Melián |
author_sort |
M. J. Hernández-Rodríguez |
title |
Effect of TiO<sub>2</sub> Addition on Mortars: Characterization and Photoactivity |
title_short |
Effect of TiO<sub>2</sub> Addition on Mortars: Characterization and Photoactivity |
title_full |
Effect of TiO<sub>2</sub> Addition on Mortars: Characterization and Photoactivity |
title_fullStr |
Effect of TiO<sub>2</sub> Addition on Mortars: Characterization and Photoactivity |
title_full_unstemmed |
Effect of TiO<sub>2</sub> Addition on Mortars: Characterization and Photoactivity |
title_sort |
effect of tio<sub>2</sub> addition on mortars: characterization and photoactivity |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2019-06-01 |
description |
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 TiO<sub>2</sub> photocatalyst were incorporated in the preparation of the mortar samples. The effect of the addition of TiO<sub>2</sub> 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. |
topic |
mortar cement TiO<sub>2</sub> NOx photocatalysis |
url |
https://www.mdpi.com/2076-3417/9/13/2598 |
work_keys_str_mv |
AT mjhernandezrodriguez effectoftiosub2subadditiononmortarscharacterizationandphotoactivity AT rsantanarodriguez effectoftiosub2subadditiononmortarscharacterizationandphotoactivity AT rdarias effectoftiosub2subadditiononmortarscharacterizationandphotoactivity AT ogonzalezdiaz effectoftiosub2subadditiononmortarscharacterizationandphotoactivity AT jmperezluzardo effectoftiosub2subadditiononmortarscharacterizationandphotoactivity AT jmdonarodriguez effectoftiosub2subadditiononmortarscharacterizationandphotoactivity AT epulidomelian effectoftiosub2subadditiononmortarscharacterizationandphotoactivity |
_version_ |
1725004930714959872 |