Study on Behaviour of High Volume Fly-Ash Concrete

International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue V, May 2018 | ISSN 2321–2705

Study on Behaviour of High Volume Fly-Ash Concrete

N. Bharathi¹, N. Poornima²

^{1, 2} Department of Civil Engineering, Kakatiya Institute of Technology & Science, Telangana, India

Abstract – Cement is the main ingredient and acts as a binding material in preparation of concrete, which is largely produced to reach its requirement in construction industry and out of all types of cements, ordinary portland cement is commonly used. In the process of manufacturing cement large amount of carbon-dioxide is emitted into the atmosphere and to control the emission pozzolanic and cementitious such as Fly-Ash, GGBS, Lime stone fines and Silica fume are used as substitutes for cement in concrete. Fly-ash is mainly used as substitute of cement and sand to produce concrete in construction industry. Fly-ash is a product of coal which is composed of fine particles that are driven out of the boiler with the fuel gases and captured by electrostatic precipitators. Fly-ash has the potential and ability to be replaced as substitute to cement in construction industry and has good strength performances and 50% replacement of cement by fly-ash in concrete is recommended in the studies. The present study is aimed to determine the mechanical properties of concrete when ordinary portland cement is replaced by 80% of fly-ash (Class F) in concrete. The study is focused on concrete mix of M50 grade having mix proportions of 1: 1.6: 3.1, with a water/cement ratio 0.42. The variation in percentage of fly-ash that replaces cement in concrete is 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70% and 80%. The specimens of cubes (150mm x 150mm x 150mm) and cylinders (150mm x 300mm) are casted to evaluate properties like compression strength and split tensile strength of high volume fly-ash concrete.

Keywords: Fly-ash, compression strength, split tensile strength

I. INTRODUCTION

Concrete is a material with the combination of cement, fine aggregate, coarse aggregate and water which is strong in compression and weak in tension. To reduce initial cost of concrete cement is replaced with other cementitious materials. Cement acts as a binding material in preparation of concrete and out of all types of cements, portland cement is the common type of cement which is used in concrete, widely around the world.

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