Influence of Mineral Admixtures on Fracture Energy of Refractory Cement at Elevated Temperatures

Abstract:

The influence of three mineral admixtures, Silica Fume (SF), Fly Ash (FA), and Rice Husk Ash (RHA) on the fracture energy of Refractory Cement (RC) over a wide range of temperature from 300K to 1173K is studied. The optimum percentage replacement of RC by these admixtures is found to be around 0.5 for all the temperatures considered but for FA. Fracture energy of control (0% admixture) and blended RC (with 0.5% admixture) are determined by three point bending of notched beam specimens. Fracture energy of RC blended with the three mineral admixtures is lower than that of control RC for temperature range of 300K to 873K. But at elevated temperature of 1173K, blending plays its role as an admixture. Experimental results are corroborating with XRD. It is observed that phenomenon of pseudo dryness of Gismondine in the blended RC causes higher fracture energy which is double that of RC only at 1173K.

• Periodical: Materials Science Forum (Volume 866)
• Pages: 88-93
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.866.88
• Online since: August 2016
• Authors: B. Geethakumari*, R. Ramesh Kumar, V. Syam Prakash
• Keywords: Elevated Temperature, Fly Ash, Fracture Energy, Refractory Cement, Rice-Husk Ash, Silica Fume, Three Point Bending

References

[1] A. M. Neville, Properties of concrete, 4th Edn, Longman group Ltd, Harlow, England. (1996).

[2] W. P. S. Dias, G. A. Khoury, P. J. E. Sullivan, Mechanical properties of hardened cement paste exposed to temperatures up to 7000C, ACI Material Journal, 87(2) 160-166.

[3] J. Ding, Y. Fu, J. J. Beaudoin, Study of hydration Mechanism in the High Alumina Cement-Sodium Silicate system, Cement and Concrete Research, 26 (5), pp.799-804, (1996).

DOI: 10.1016/s0008-8846(96)85017-4

[4] K. M. Parker and J. H. Sharp, Refractory Calcium Aluminate Cements, Trans. J. British Ceram. Soc. 81(2), 35-42 (1982).

[5] G. Rodriguez de Sensale, Strength development of concrete with Rice Husk Ash, Cement and Concrete Composites 28(2006), 158-160.

DOI: 10.1016/j.cemconcomp.2005.09.005

[6] S. K. Agarwal, Pozzolanic activity of various siliceous materials, Cement and Concrete Research (2006), 1735-1739.

DOI: 10.1016/j.cemconres.2004.06.025

[7] M. S. Ismail and A. M. Waliuddin, Effect of RHA on high strength concrete, Construction and Building Materials, 10(7), (1996), 521-526.

DOI: 10.1016/0950-0618(96)00010-4

[8] R. Kishore, V. Bhikshma and P. Jeevan Prakash, Study on strength characteristics of High strength Rice Husk Ash Concrete, Procedia Engg 14 (2011), 2666-2672.

DOI: 10.1016/j.proeng.2011.07.335

[9] M. Collepardi, S. Monosi and P. Piccioli, The influence of pozzolanic materials on the mechanical stability of aluminous cement, Cement and Concrete Resarch, 5(5), pp.961-968, (1995).

DOI: 10.1016/0008-8846(95)00091-p

[10] K. Ganesan, K. Rajagopal and K. Thangavel, Rice Husk Ash blended cement, assessment of optimal level of replacement for strength and permeability properties of concrete, Construction and Building Materials. 22(2008), 1675-1683.

DOI: 10.1016/j.conbuildmat.2007.06.011

[11] M. Heikal, Effect of temperature on physic-mechanical and mineralogical properties of Homra pozzolana cement paste, Cement and Concrete Research. 30, 1835-1839.

DOI: 10.1016/s0008-8846(00)00403-8

[12] B. Geethakumari, R. Ramesh Kumar and V. Syam Prakash., Role of mineral admixtures on compressive strength of Refractory cement at elevated temperatures, ICCE-2012, Penang, Malaysia. Pp. 205-208, World Academy of Science, Engineering and Technology, 72 (2012).

DOI: 10.4028/www.scientific.net/msf.866.88

[13] B. Geethakumari, R. Ramesh Kumar and V. Syam Prakash., Role of sodium silicate on compressive strength of Refractory cement at elevated temperatures, International journal of Earth Science and Engineering, 4(6), pp.864-866.

DOI: 10.4028/www.scientific.net/msf.866.88