American Journal of Engineering Research (AJER) 2017 American Journal of Engineering Research (AJER) e-ISSN: 2320-0847 p-ISSN : 2320-0936 Volume-6, Issue-10, pp-212-220 www.ajer.org Research Paper Open Access www.ajer.org Page 212 Effect of Using Different Supplementary Cementitious Materials in High Strength Self Compacting Concrete Kamal G. Sharobim 1 , Hassan Mohammedin 1 , Arab Mohamed 2 , Mohy S. Fattouh 3 1 (Testing and Properties of Materials Department, Faculty of Engineering, Suez Canal University, Ismailia, Egypt) 2 (Testing and Properties of Materials Department, Faculty of Engineering, BeniSuef University, Egypt) 3 (Testing and Properties of Materials Department, Faculty of Engineering, Sinai University, Egypt) ABSTRACT: High strength self-compacting concrete (HSSCC) is one of the most significant recent advances in concrete technology. Replacing cement with different supplementary cementitious materials has a good impact on the environment according tothe reducing of the generated amount of carbon dioxide. Supplementary materials can be usednot only as a cement replacement but also as a filler to help in reducing the total voids content in concrete. Replacing cement with supplementary cementitiousmaterialwas affected the workability and strength of concrete and modify the microstructure of the matrix. An experimental investigation wascarried out to study the effect of replacing cement with different contents of silica-fume, fly ash and marble powder or with mix of two types of these supplementary materials. The rapid chloride penetration test (RCPT) was conductedas an indicator for concrete permeability and durability. Inaddition, the micro-structural analysis using SEM helped in confirming the compressive strength results. Keywords: High strength self-compacting concrete, Silica-fume, Fly ash, Marblepowder. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 07-10-2017 Date of acceptance: 23-10-2017 --------------------------------------------------------------------------------------------------------------------------------------- I. INTRODUCTION High strength concrete is defined as "a concrete having a minimum 28-day compressive strength of 60MPa" [1].While, self-consolidating concrete (SCC) as "highly flowable, no segregating concrete that can spread into place, fill the form work, and encapsulate the reinforcement mechanical consolidation"[2]. Cement content reduction could be achieved by replacing with various supplementary cementitious materials [3].For high strength self-compacted concrete (HSSCC),silica fume is an extremely effective material for achieving very high strength and significant decrease in permeability [4]. Silica fume improves both strength and durability of concrete when using silica fume from 10% to 30% of silica fume by replacement [5].The mineral additives as fly ash may increase the workability, durability and long-term properties of concrete [6].Marble powder mainly obtained from the processing plants out of sawing and polishing of marble blocks. In addition, the workability of SCC found to be increasing with increase in waste marble powder percentage from 10-50% by replacement with cement content. It has been observed that, on addition of waste marble powder, the filling ability of SCC by Slump flow and V-Funnel tests found to be increasing with the increase in percentage of waste marble powder [7]. The use of different supplementary cementitious materials such as silica fume, and fly ash reduce both pore sizes and porosity. However, the chemistry, fineness and dosage of the supplementary cementitious material affect the early strength development of concrete [8].Reducing the water-cement ratio and the addition ofpozzolanic admixtures are often used to modify the microstructure of the matrix and to optimize the transition zone. The Reduction of the water-cement ratio results in a decrease in porosity and refinement of capillary pores in matrix [9]. Rapid chloride permeability test (RCPT) has developed as a quick test able to measure the rate of transport of chloride ions in concrete. [10].This study aims to achieve high strength self-compacting concrete while partially replacing cement with different contents of silica-fume, fly ash and marble powder or with mix of two types of these supplementary cementitious materials. Theeffect of adding different types and contents of supplementary cementitious materials on fresh and hardened properties of HSSCC is discussed. II. EXPERIMENTAL PROGRAM