International Journal of Technology Enhancements and Emerging Engineering Research (ISSN 2347-4289)

IJTEEE >> Volume 2 - Issue 6, June 2014 Edition

International Journal of Technology Enhancements and Emerging Engineering Research  
International Journal of Technology Enhancements and Emerging Engineering Research

Website: http://www.ijteee.org

ISSN 2347-4289

Strength Development Characteristics Of High Strength Concrete Incorporating An Indian Fly Ash

[Full Text]



Arka Saha, Dr. Samaresh Pan, Soumen Pan



Keywords: Aggregate, Admixture, Compressive strength, Fly ash, Fly ash replacement percentages, High strength concrete, Water-cementitious material ratio.



ABSTRACT: In the present investigation a humble effort has been made to finding the possibilities of an Indian fly ash in the production high strength high performance concrete and to evaluate the contributions of some significant mix composition parameters and age upon the strength development characteristics of concrete. A siliceous fly ash having a glass content of 34% and a fineness of 70% passing a 45 micron sieve was used. Experimentation has been performed over water-cementitious material ratios (w/cm) ranging from 0.27 to 0.42, cementitious material contents (cm) varying from 430 to 550 kg/m3 and fly ash replacements ranging from 0 to 40% by weight of cementitious material. Compressive strengths of concrete have been evaluated at 7, 28 and 90 days age. Slump values of fresh concretes are in the range of 150-200 mm. Results of the present investigation indicate that compressive strength decreases as the w/cm and the fly ash replacement percentage increase at all the ages. 28 day strength of concrete has varied between 33 to 68 MPa while that of 90 day strength has ranged from 42 to 71 MPa. It is also revealed that a judicious use of fly ash has a tremendous potential in producing HSC. Based on statistical analysis of the database of the work, optimum fly ash replacements leading to strength similar to control (0% fly ash) have been determined as 10% and 17% for 28 and 90 days respectively. The results also suggest that HSC incorporating fly ash as a partial replacement of cement may be developed with a w/cm less than 0.34. Contribution of fly ash in improving strength of concrete increases with increasing replacement levels beyond 28 days. The average ratio of fly ash concrete strength between 7 and 28 days has been observed as 0.61 whereas gain in strengths from 28 to 90 days is about 20%.



[1] ACI Committee 211 (1993), “Guide for Selecting Proportions for High Strength Concrete with Portland Cement and Fly ash”, ACI Materials Journal, Vol.90, No.3, pp. 272 – 283.

[2] Bharatkumar, B. H., Narayanan, R., Raghuprasad, B. K., Ramachandramurthy, D. S. (2001)., “Mix proportioning of high performance concrete”, Cement & Concrete Composites, Vol.23, pp. 71 – 80.

[3] Gopalan, M. K., Haque, M. N. (1986), “Strength development of fly ash concretes”, Engineering Materials and Structures, Vol.19, No.1, pp. 33-37.

[4] Mehta, P. K. (1985), “Influence of Fly Ash Characteristics on the Strength of Portland Fly Ash Mixtures”, Vol.15, pp.669 – 674.

[5] Xu, A., Sarkar, S.L. (1993), “Hydration and Properties of Fly ash Concrete”, in S.N.Ghosh edited Mineral Admixtures in Cement and Concrete, Progress in Cement and Concrete series, Akademia Books International, New Delhi, India, pp. 174 – 225.

[6] Slanicka, S. (1991), “The Influence of Fly Ash Fineness on the Strength of Concrete”, Cement and Concrete Research, Vol.21, pp. 285 – 296.

[7] Popovics, S. (1982), “Strength Relationships for Fly Ash Concrete”, ACI Journal, Vol.79, No.5, 1982, pp. 43 – 49.

[8] Oner, A., Akyuz, S., Yildiz., R. (2005), “An Experimental Study on Strength Development of Concrete Containing Fly Ash and Optimum usage of Fly Ash in Concrete”, Cement and Concrete Research, Vol.35, pp. 1165 – 1171.

[9] Oluokun, F. A. (1994), “Fly Ash Concrete Mix Design and the Water - Cement Ratio Law”, ACI Materials Journal, Vol.91, No.4, pp. 362 – 371.

[10] Neville, A. M. (1996), “Properties of Concrete”, Fourth Edition ELBS with Addison Wesley Longman Limited, England.

[11] IS: 8112-1989, Indian Standard, "Specification for 43 Grade Ordinary Portland Cement". Bureau of Indian Standards.

[12] IS: 3812(Part 1 & 2)-2003, Indian Standard, "Pulverized Fuel Ash - Specification". Bureau of Indian Standards.

[13] Pan, S., Bhanja, S., (2012) “Strength Prediction Models for Fly ash concrete” UKIERI Concrete Congress Innovations in Concrete Construction, Jalandhar, India, 5-8 March.

[14] Bhanja, S., Pan, S., (2013) “ Modified Water cement ratio law for fly ash concrete” The Indian Concrete Journal, Vol.87, No.10, pp. 21 –28, October, 2013.

[15] Pan, Samaresh (2013), “Effect of Fly Ash as a Cement replacement material on the characteristics of concrete” PhD dissertation, Jadavpur University, Kolkata, India.

[16] Gopalakrishnan, S., Rajamane, N. P., Neelamegam, M., Peter, J. A., Dattatreya, J. K. (2001), “Effect of Partial Replacement of Cement with Fly ash on the Strength and Durability of HPC”, The Indian Concrete Journal, pp.335 – 340.

[17] Haque, M. N., Kayali, O. (1998), “Properties of High-Strength Concrete Using a Fine Fly Ash”, Cement and Concrete Research, Vol.28, No.10, pp. 1445 – 1452.

[18] Bhanja, S., Sengupta, B. (2003), “Modified water-cement ratio law for silica fume concretes”, Cement and Concrete Research, Vol.33, pp. 447 – 450.

[19] Aitcin, P. C. (1984), “High performance Concrete”, E & FN SPON, London, England.