Effect on Addition of Nano “Titanium Dioxide” (TiO 2 ) on Compressive Strength of Cementitious Concrete Jay Sorathiya 1 , Dr. Siddharth Shah 2 and Mr. Smit Kacha 3 1 M.E. Structural Engineering Student, Civil Engineering Department, Marwadi Education Foundation Group of Institutions-Rajkot, Gujarat, India 2 Professor & Head, 3 Assistant Professor, Civil Department, Marwadi Education Foundation Group of Institutions-Rajkot, Gujarat, India jayu.jay1992@gmail.com, siddharth.shah@marwadieducation.edu.in, smit.kacha@marwadieducation.edu.in Abstract Cementitious concrete has great practical difficulties in achieving high compressive strength and durability of high performance structures. But it becomes a challenge to increase the compressive strength and durability of particular cementitious composite and also maintaining basic desirable properties of concrete. This paper addresses these problems by the addition of nano-materials. In this study, an attempt is made to understand the effect of Anatase Nano Titanium Dioxide (TiO 2 ), on Conventional Concrete (CC) of M 20 grade with various proportions 0.5%, 0.75%, 1.0%, 1.25%, 1.5% in relation with the weight of cement. The Workability, Strength parameters at various proportions of Anatase Nano Titanium Dioxide (TiO 2 ) are tested at different durations. The results obtained are being discussed in the paper. Keywords: Nano Material, Nano Titanium dioxide, Workability, Strength, conventional concrete. Abbreviations: TiO 2: Titanium Dioxide CC: Conventional concrete NS: Nano silica Kalpa Publications in Civil Engineering Volume 1, 2017, Pages 219–225 ICRISET2017. International Conference on Re- search and Innovations in Science, Engineering &Technology. Selected papers in Civil Engineering C.D. Modhera, G.J. Joshi, D. Soni, I.N. Patel, A.K. Verma, L.B. Zala, S.D. Dhiman, D.R. Bhatt, J.M. Rathod, B.C. Goradiya, M.S. Holia and D.K. Patel (eds.), ICRISET2017 (Kalpa Publications in Civil Engineering, vol. 1), pp. 219–225