Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32759
Experimental Study on Strength and Durability Properties of Bio-Self-Cured Fly Ash Based Concrete under Aggressive Environments

Authors: R. Malathy

Abstract:

High performance concrete is not only characterized by its high strength, workability, and durability but also by its smartness in performance without human care since the first day. If the concrete can cure on its own without external curing without compromising its strength and durability, then it is said to be high performance self-curing concrete. In this paper, an attempt is made on the performance study of internally cured concrete using biomaterials, namely Spinacea pleracea and Calatropis gigantea as self-curing agents, and it is compared with the performance of concrete with existing self-cure chemical, namely polyethylene glycol. The present paper focuses on workability, strength, and durability study on M20, M30, and M40 grade concretes replacing 30% of fly ash for cement. The optimum dosage of Spinacea pleracea, Calatropis gigantea, and polyethylene glycol was taken as 0.6%, 0.24%, and 0.3% by weight of cement from the earlier research studies. From the slump tests performed, it was found that there is a minimum variation between conventional concrete and self-cured concrete. The strength activity index is determined by keeping compressive strength of conventionally cured concrete for 28 days as unity and observed that, for self-cured concrete, it is more than 1 after 28 days and more than 1.15 after 56 days because of secondary reaction of fly ash. The performance study of concretes in aggressive environment like acid attack, sea water attack, and chloride attack was made, and the results are positive and encouraging in bio-self-cured concretes which are ecofriendly, cost effective, and high performance materials.

Keywords: Biomaterials, Calatropis gigantea, polyethylene glycol, Spinacea oleracea, self-curing concrete.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1129267

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2741

References:


[1] Bentz, D.P. Geiker, M.R and Hansen, K.K. “Shrinkage-reducing admixtures and early-age desiccation in cement pastes and mortars”, Cement and Concrete Research. Vol.31, No.7, pp.1075-1085, 2001.
[2] Lura, P. Jensen O.M. and Weiss, J. “Cracking in cement paste induced by autogenous shrinkage”, Materials and Structures, Vol.42, No.8, pp.1089-1099, 2009.
[3] Shah, S. Weiss, W. and Yang, W. “Shrinkage Cracking - Can It Be Prevented?”, ConcreteInternational, Vol. 20, No. 4, pp. 51-55, 1998.
[4] Weber, S. and Reinhardt, H.W. “A New Generation of High Performance Concrete”: Concrete with Autogenous Curing, Advanced Cement Based Materials, Vol. 6 pp.59-68, 1997.
[5] Van Breugel, K. “Numerical modelling of volume changes at early ages - Potential, pitfalls and challenges”, Material Structure, Vol. 34, No.239, pp.293-301, 2001.
[6] Bentur, A. Igarashi, S. and Kovler, K. “Prevention of autogenous shrinkage in high-strength concrete by internal curing using wet lightweight aggregates”, Cement Concrete Research, Vol.31, No.11, pp. 1587-1591, 2001.
[7] Dhir, R.K. Hewlett, P.C. Lota, J.S. and Dyre, T.D. “An investigation into the feasibility of formulating ‘self-curing’ concrete”, Material Structure, Vol.27, No.174, pp.606–615, 1994.
[8] Hewlett, P. “Lea's Chemistry of Cement and Concrete”, 4th edition ed: Butterworth-Heinemann, 2003.
[9] Taylor, H.F.W. Cement chemistry, Second edition, Thomas Telford edition published, 1997.
[10] Bentz, D. “Three-Dimensional Computer Simulation of Portland Cement Hydration and Microstructure Development”, Journal of the American Ceramic Society, Vol. 80, No.1, pp. 3-21, 1997.
[11] Barcelo, L. Boivin, S. Rigaud, S. Acker, P. Clavaud, B. and Boulay, C. “Linear vs. volumetric autogenous shrinkage measurement: Material behaviour or experimental artefact?”, Proceedings of 2nd International Seminar on Self-desiccation and its Importance in Concrete Technology, Lund, Sweden, pp.109-125, 1999.
[12] Sant, G. Dehadrai, M. Lura, P. Bentz, D. Ferraris, C. and Bullard, J. “Detecting the Fluid-to-Solid Transition in Cement Pastes: Part I - Assessment Techniques”, Concrete International, Vol.31, No.6, pp.53-58, 2009.
[13] Lura, P. Couch, J. Jensen, O. and Weiss, W. “Early-Age Acoustic Emission Measurements in Hydrating Cement Paste: Evidence for Cavitation during Slidification Due to Self Desiccation”, Cement and Concrete Research, accepted for publication, Vol.39, No.10, pp.861- 867, 2009.
[14] Alberty, R. and Daniels, F. Physical Chemistry. New York: John Wiley & Sons, p. 682, 1980.
[15] MacKenzie, J.K. “The elastic constants of a solid containing spherical holes”, Proceedings of the Physics Society, Vol.683, pp.2-11, 1950.
[16] Geetha, M. and Malathy, R. “Comparison of strength properties of concrete on addition of admixtures”, ISSN 0975-6744, Vol.1, No.1, pp. 7-10, 2009 ( e-journal).
[17] Geetha, M. and Malathy, R. “Comparison of strength properties of concrete on addition of admixtures”, International Journal of computer Applications in Engineering, Technology and Science (IJ-CA-ETS),ISSN 0974-3596/, Vol.2, No.1 , pp.130-133, 2009
[18] Geetha, M. and Malathy, R. (2010), ‘Durability properties of self curing concrete by addition of vegetative material as Admixtures’ in Technology today , Quarterly journal ISSN 2180-0987, March 2010 ,Volume II issue -1, pp 99-104.
[19] Geetha, M. and Malathy, R. (2011), ‘Comparative strength and durability properties of Polymeric materials as Self curing agents’, journal of International Science and Technology, ISSN : 0975- 5462, Volume 3 , issue 1,pp 776-771
[20] R. Malathy, “Effect of bio materials as self-curing agents in fly ash based concrete”, Proceedings of Advancements in structural concrete , ACECON 2015, Vol.I, pp. 177-184.