2013 Volume 67 Issue 1 Pages 507-513
As buildings need to have not only high design but also durability, it’s necessary to think about multifunction materials. In this study, for the purpose of clarifying the basic properties of mortar and concrete using titanium oxide（TiO2）as an admixture, the authors have carried out experiments on the fresh and hardened properties focusing on the W/C and TiO2 ratios such as compressive strength, drying shrinkage, carbonation depth, chloride content and so on. The results suggest that workability properties could be satisfied and higher strength achieved by substituting optimum levels of TiO2. In addition, when examining brightness retention it was found that mortar containing 10％～20％ TiO2 had good resistance to brightness degradation and self-cleaning performance with TiO2 as a photocatalyst. As a result, using proper TiO2 as an admixture in mortar or concrete can be useful for giving additional performance such as brightness retention and self-cleaning effects on the surface, as well as strength development and some durability properties of the specimen itself.
