Abstract
Fly ash is used as a supplementary cementitious material in concrete. In order to determine the strength of fly ash concrete similar to ordinary Portland cement concrete at a required age, one of the methods of designing concrete mix is by using efficiency factor (k-value ) concept. This paper presents the utility of this concept for predicting the strength of fly ash concrete. The 28 days strength-based efficiency factor is 0.54 for 25 % fly ash and 0.35 for 45 % fly ash. The proposed efficiency factor is applicable to wide range of strength and fly ash percentage.
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Acknowledgment
The authors would like to thank personnel of Badarpur Thermal Power Station of National Thermal Power Corporation (NTPC) Ltd. for providing fly ash freely. Assistance rendered by Mr. Gautam Barai, Mr. Pradeep Negi and other staffs of Concrete Structures Laboratory, Department of Civil Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi, India is gratefully acknowledged.
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Murumi, K., Gupta, S. (2015). Evaluating the Efficiency Factor of Fly Ash for Predicting Compressive Strength of Fly Ash Concrete. In: Matsagar, V. (eds) Advances in Structural Engineering. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2187-6_133
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DOI: https://doi.org/10.1007/978-81-322-2187-6_133
Publisher Name: Springer, New Delhi
Print ISBN: 978-81-322-2186-9
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