Binary, Ternary and Quaternary Blends in Self-Compacting Concrete Rajat Jain, Navesh Kumar, Megh Patel, Kartik Gupta B. Tech (Civil), School of Technology Pandit Deendayal Petroleum University Abstract:- Experimental study on the effect of strength of binary, ternary and quaternary blends of self compacting concrete incorporating different mineral admixtures. In the present study Fly Ash (FA), Silica Fume (SF), ground granulated blast furnace slag (GGBS) and Limestone powder (LP) were blended in pre-determined proportions replacing 20-50% of Ordinary Portland Cement (OPC) by weight. SCC mix of M40 grade is developed by keeping water/binder ratio and total cementitious material constant for all mixes at 0.30 and 600 kg/m 3 , respectively. Tests were carried out to characterize the compressive and flexural strength of binary, ternary and quaternary mixes at 7, 14, 28, 56 & 90 days and the obtained results were compared with the correspond values obtained for controlled concrete (100% OPC). The entire specimens were prepared, cured and tested as per Indian Standard code of practice. In addition to that homogeneity of entire specimens was determined via Ultrasonic Pulse Velocity (UPV). Strength of quaternary mix with GGBS was found better than that of the controlled mix concrete. Based on test results, optimum mixes of FA, SF and GGBS with appropriate dosage of superplasticizers (SP) at replacement levels of 30% & 50% of cement gave good results for fresh and hardened properties as compared to controlled concrete. Keywords:- Self Compacting Concrete; Mineral Admixture; Quaternary Blends; 1. INTRODUCTION Self – compacting concrete (SCC), also known as Self- consolidating concrete, is a fluid mixture, which is able to flow under its own weightand fill around congested reinforcement whilst maintaining homogeneity, without vibration. SCC was first introduced in the late 1980’s by Japanese researcher named Okamura [3]. The main drive for the development of SCC and its research were the endangered durability of reinforced concrete structures, need for easier and high-quality fresh concrete placement and lack of skilled labour force. Self – compacting concrete is not being used in regular construction widely due to relatively high material costand also due to lack of research in the field. The cost of materials used in preparing SCC is more due to the relatively high demand of cementitious materials and chemical admixtures which includes high – range water reducing admixtures (HRWRA) and viscosity enhancing admixtures (VEA). Adding a large volume of powdered material or viscosity modifying admixture can eliminate segregation. The powdered materials that can be added are fly ash, GGBS, limestone powder, silica fume, etc. Limestone filler also helps in controlling the heat of hydration during mixes that have high PC content. The cost of SCC can be reduced by partial replacement of cement and supplementary cementitious materials by readily available mineral admixtures/fillers. The use of mineral additives as partial replacement to Portland cement in concrete is a better step towards sustainable development because of their technological, economic, and environmental benefits. Inert and pozzolanic cement additives modify the properties of concretes by their physical and chemical activities of concrete by promoting, filling of micro pores, heterogeneous nucleation and pozzolanic reactions. Heterogeneous nucleation is a physical process leading to the chemical activation of hydration of OPC such that the cement addition particles act as nucleation centers for the hydrates, thus enhancing cement hydration [8]. Concrete should be resistive from all weathering actions, therefore mechanical, durability and microstructure study of concrete should be considered [6,8,10-12]. The use of mineral additions such as limestone fillers, blast furnace slag and natural pozzolana improves the resistance of concrete to the attack of aggressive agents (sulfuric acid), because they reduce the presence of calcium hydroxide, which is the most vulnerable component to acid attacks [13].The slag has several advantages in the manufacture of cement. First, it has a relatively constant chemical composition compared to fly ash, silica fume, natural pozzolana etc. In addition, it has other advantages such as, low heat of hydration, resistance to acids and sulfates, better workability, and higher ultimate strength [14-16]. The main objective of this research is to achieve information about the effect of the simultaneous incorporation of fly ash, blast furnace slag; limestone powder and silica fume as partial replacement to the Portland cement on the compressive and flexural strength of concrete compare to conventional concrete. Our project focuses on creating a binary, ternary and quaternary blended Self Compacting Concrete (SCC) of M40 grade with better transport properties and strength similar or better to that when OPC is used. In the present work the initial mix proportion is determined by Indian Standard method of mix design because there is no Standard mix design of SCC mixes, and fine tuned by different guidelines to get the mix which satisfies the required fresh and hardened properties of SCC. International Journal of Engineering Research & Technology (IJERT) ISSN: 2278-0181 http://www.ijert.org IJERTV8IS030180 (This work is licensed under a Creative Commons Attribution 4.0 International License.) Published by : www.ijert.org Vol. 8 Issue 03, March-2019 364