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http://dx.doi.org/10.14190/JRCR.2018.6.2.108

Mechanical Performance Evaluation in Concrete Impregnated with Silicate for TiO2 Utilization  

Kim, Hyeok-Jung (Industry Academic Cooperation Foundation, Hankyong National University)
Kim, Young-Kee (Department of Chemical Engineering, Hankyong National University)
Kwon, Seung-Jun (Department of Civil Engineering, Hannam University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.6, no.2, 2018 , pp. 108-114 More about this Journal
Abstract
Degradations of durability and aesthetic performance in concrete happen during service life due to surface deterioration and dirt stains. Recently, many researches have been performed on self-cleaning and surface enhancement through surface impregnant using photocatalytic reaction with VOCs(Volatile Organic Compounds) removal. This paper is for preliminary study on surface impregnation with silicate and photocatalysis - $TiO_2$. For the work, two types of silicate based impregnants(CS - Coloidal Silica and SC - Sodium Alumina Silicate) are considered. Several tests for viscosity and surface tension are performed, and pull-off test on impregnated concrete is performed. For the surface impregnated concrete, $TiO_2$ is absorbed through submerging and spraying conditions. Through compressive strength test and SEM analysis, it is evaluated that spraying $TiO_2$ on surface impregnated concrete after 30min. of drying period is very effective both for strength enhancement and surface densification.
Keywords
Photocatalysis; $TiO_2$; Surface impregnant; Durability; SEM(Scanning Electron Microscope);
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