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THE EFFECT OF TIO2 ON THE PROPERTIES OF CEMENTIOUS COMPOSITE MATERIALS –THE CURRENT STATE-OF-THE ART

A. Hegyi, A. Lazarescu, C. Dico, H. Szilagyi
Thursday 11 October 2018 by Libadmin2018

ABSTRACT

Nowadays, raised awareness about the importance of sustainability and also the environmental impact of using concrete in the construction industry has led to numerous studies on how to create an environmental friendly material, with self-cleaning properties and how to possibly use it in urban areas and to ensure a cleaner environment and reduce maintenance costs. Nitrogen oxide (NOx) is the air pollutant which is directly responsible for the air pollution due to smog, smoke, vehicle emission, etc. The self cleaning process of concrete can be obtained by oxidizing the NOx gases into powdered or dust like particles by using the UV rays from the sun as resource and using a photocatalytic substance in order to obtain that effect. Self-cleaning concrete is a special material because the technology of producing it can only be applied by incorporating TiO2 into photocatalytic coatings for concrete specimens. When sunlight hits the surfaces most of the organic and inorganic pollutants are neutralized. This can lead to a higher level of cleanliness of the buildings surfaces and the surrounding air pollution can be drastically reduced. The aim of this paper is to briefly review the self-cleaning concrete, to present the main principles on which self-cleaning concrete is based and also to present it current applications.

Keywords: self-cleaning, environment friendly, sustainability


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