http://www.iaeme.com/IJCIET/index.asp 193 editor@iaeme.com International Journal of Civil Engineering and Technology (IJCIET) Volume 8, Issue 3, March 2017, pp. 193–200 Article ID: IJCIET_08_03_020 Available online at http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=3 ISSN Print: 0976-6308 and ISSN Online: 0976-6316 © IAEME Publication Scopus Indexed EFFECT OF FLY ASH ON MECHANICAL PROPERTIES OF M30 AND M60 GRADE CONCRETE A. Venkateswara Rao Associate Professor, Department of Civil Engineering, K.L University, Vijayawada - 522502, Andhra Pradesh, India K. Srinivasa Rao Professor, Department of Civil Engineering, College of Engineering, Andhra University, Visakhapatnam - 530003, Andhra Pradesh, India ABSTRACT Concrete is one of the highest consumed primary construction material in the world with a vital role in the construction field. Production of one ton of cement produces nearly one ton of CO2 causing environmental problems. So there is a need to reduce cement production and use some additives to make concrete sustainable. Due to growing environmental awareness, there is an increasing interest in the use of fly ash. It can be used either as an admixture or as partial replacement of cement or as partial replacement of fine aggregate and also as supplementary addition to achieve different properties of concrete. This paper presents the experimental investigations on the effect of fly ash content on compressive strength of M60 and M30 grades of concrete at an age of 7, 28, 56 and 91 days. Key words: Concrete, Fly ash, Compressive strength, Cement. Cite this Article: A. Venkateswara Rao and K. Srinivasa Rao, Effect of Fly Ash On Mechanical Properties of M30 and M60 Grade Concrete. International Journal of Civil Engineering and Technology, 8(3), 2017, pp. 193–200. http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=3 1. INTRODUCTION Concrete has been the leading, extensively used construction material as its ingredients are easily available, manufacturing cost of it is less and also durable over other construction material. Cement is one of the chief ingredients, also responsible for strength of concrete and globally the demand for cement is increasing year by year due to increase in utility of cement for the development of infrastructure and sustainability, Previous investigations reveals that concrete has been prepared by introducing some additives called as mineral admixtures, beside its basic ingredients to investigate their effect on strength, durability and other properties of concrete. Fly ash is one such material easily available as it (fly ash) is the waste product in