http://www.iaeme.com/IJCIET/index.asp 3137 editor@iaeme.com International Journal of Civil Engineering and Technology (IJCIET) Volume 10, Issue 03, March 2019, pp. 3137–3148, Article ID: IJCIET_10_03_316 Available online at http://www.iaeme.com/ijmet/issues.asp?JType=IJCIET&VType=10&IType=3 ISSN Print: 0976-6308 and ISSN Online: 0976-6316 © IAEME Publication Scopus Indexed AN EXPERIMENTAL INVESTIGATION ON SUPERHYDROPHOBIC COATING USING NANO-GGBS ON CEMENT MORTAR Jeya Sheema J PG Student, Department of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamilnadu, India Prabavathy S Senior Professor & Head, Department of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamilnadu, India ABSTRACT A novel method to achieve water-repelling character upon a cement paste has been investigated. GGBS (Ground Granulated Blast furnace Slag) is a by-product from steel industry which is preferred to produce a superhydrophobic surface coating for cement mortar. The super hydrophobic coating is prepared by sonicating Nano- scaled GGBS powder into a mixture of silane/siloxane. Different methods of application of coating, such as brushing, spraying and impregnation are used. In this paper, the super hydrophobic performance and durability of the coated cement mortar cubes has been reported based on water contact angle, water absorption and sorptivity. Also the reduction of surface porosity has been studied by using Ultrasonic pulse velocity test. As a result, The spray coated surfaces exhibited superhydrophobicity with a water contact angle of 152.2°. The performance of the impregnated samples are notably higher in water absorption, sorptivity and ultrasonic pulse velocity. Key words: Hydrophobicity, Silane, Contact angle (CA), Water-repellency, Nanoparticles Cite this Article: Jeya Sheema J and Prabavathy S, An Experimental Investigation on Superhydrophobic Coating Using Nano-GGBS on Cement Mortar, International Journal of Civil Engineering and Technology 10(3), 2019, pp. 3137–3148. http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=10&IType=3 1. INTRODUCTION Reinforced concrete is the often used construction material in buildings, roads and bridges, in any case, steel corrosion poses an incredible threat to the strength and stability of these concrete structures [1]. Ingression of water is the major cause for all the physical and chemical degradation in concrete structures [2]. Generally, the hydrophilic behavior of the concrete is induced by the micro-pores, micro-voids and micro-cracks on its surface [3]. The