Thermal Stability of Geopolymer - Sr Contaminated Zeolite A Blends

Abstract:

Geopolymer have gradually become an alternative materials for hazardous and radioactive waste immobilization. However, the compatibility between radioactive waste and geopolymer in various extreme conditions are still not clear. In this study, the thermal stability of geopolymer solidified product of Sr contaminated zeolite A was investigated. For this purpose, the specimens after standard curing were subjected to temperatures of 600, 700 and 800 degrees C for 2h. Freeze-thaw cycles were also employed to test the thermal stability of geopolymer matrices. Meanwhile, changes in the leaching characteristics and physical properties were analyzed. Analysis showed that geopolymer - Sr contaminated zeolite A blends exhibited excellent thermal stability. Although elevated temperature and freeze-thaw cycles led to the deterioration of geopolymer matrices, the leaching rate and mechanical properties of solidified product were still acceptable. The resluts obtained indicated that geopolymer appeared to be very suitable for radioactive waste immobilization.

• Periodical: Key Engineering Materials (Volume 727)
• Pages: 1089-1097
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.727.1089
• Online since: January 2017
• Authors: Zao Jiang, Zhong Hui Xu, Qin Shuai, Ping Li, Ya Hong Xu
• Keywords: Freeze-Thaw Cycles, Geopolymer, Radioactive Wastes, Thermal Stability, Zeolite A

References

[1] K. Komnitsas and D. Zaharaki: Minerals Engineering, Vol. 20 (2007) No. 14, p.1261.

[2] C. Kuenzel, J.F. Cisneros, T.P. Neville, L.J. Vandeperreb, S.J.R. Simonsc, J. Benstedc and C.R. Cheesemanaetc: Journal of Nuclear Materials, Vol. 466 (2015) p.94.

[3] C.J. Shi and A. Fernández-Jiménez: Journal of Hazardous Materials, Vol. 173 (2006) No. 3, p.1656.

[4] Y. Luna Galiano, C. Fernández Pereira and J. Vale: Journal of Hazardous Materials, Vol. 185 (2011) No. 1, p.373.

[5] Z.H. Xu and D.D. WU: Research Journal of Chemistry and Environment, Vol. 17 (2013) No. 2, p.223. (In Chinese).

[6] Q. Li, Z. Sun, D.J. Tao, Y. Xu, P.M. Li, H. Cui and J.P. Zhai: Journal of Hazardous Materials, Vol. 262 (2013) No. 22, p.325.

[7] J.Y. Ye, W.S. Zhang and D. Shi: Construction and Building Materials, Vol. 69 (2014), No. 11, p.41.

[8] S.B. Eskander, S.M. Abdel Aziz, H. El-Didamony and M.I. Sayed: J Hazard Mater, Vol. 190 (2011), No. 1, p.969.

[9] A.J. Klemm, M. Wieloch, P. Klemm and W. Marks: Jama the Journal of the American Medical Association, Vol. 216 (2004), No. 2, p.278.

[10] M.W. Hussin, M.A. R Bhutta, M. Azreen, P.J. Ramadhansyah and J. Mirza: Materials and Structures. Vol. 48 (2014), No. 3, p.709.

[11] Y.N. Chan, X. Luo and W. Sun: Cement and Concrete Research, Vol. 30 (2000), No. 2, p.247.

[12] D. Khale and R. Chaudhary: Journal of Materials Science, Vol. 42 (2007), No. 3, pp.729-746.

[13] M.T. Jin, Y. Sun and L.W. Chen: Acta Mineralogica Sinica, Vol. 35 (2015), No. 2, p.185. (In Chinese).

[14] J.L. Provis, P.A. Walls and J.S. J van Deventer: Chemical Engineering Science., Vol. 63 (2008) No. 18, p.4480.

[15] P. Duxson, G.C. Lukey and J.S. J van Deventer: Langmuir, Vol. 22 (2006) No. 21, p.8750.

[16] X.K. Jiao, Y.M. Zhang and T.J. Chen: Construction and Building Materials, Vol. 38(2013), No. 38, p.43.

[17] S. Andini, R. Cioffi, F. Colangelo, T. Grieco, F. Montagnaro and L. Santoro: Waste Management. Vol. 28 (2008) No. 2, p.416.

DOI: 10.1016/j.wasman.2007.02.001