Simulating Experimental Study of Phosphate and Fluoride on the Influence of Phosphogypsum Properties and Microstructure
Publication: Journal of Materials in Civil Engineering
Volume 20, Issue 7
Abstract
In this paper, phosphate and fluoride were added into the gypsum, respectively, to simulate phosphate and fluoride in the phosphogypsum. The affect of adding different impurities on setting time, compressive strength, and bulk density were inspected by simulation experiments. The pore structure of hardened gypsum was analyzed by mercury intrusion porosimetry, and the micromorphology of hardened gypsum was observed by scanning electric micrograph in sequence to get the influencing rule of different impurities and its contents on the performance and micromorphology of phosphogypsum. The results indicate that phosphate prolongs the setting time, while the fluoride shortens it. Meanwhile, the strength gets lower because of the coarsening crystal resulting from the phosphate and fluoride.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers acknowledge the support of the National Natural Science Foundation of Shandong Province of China (No. NNSFCY2004F17). At the same time, the writers would like to thank the teachers in their school for their technical assistance in SEM and MIP.
References
Jiang, H.-Y., and Liu, T. (2004). “Study on the influence of grading and impurities distribution for the properties of phosphogypsum.” J. Wuhan Univ. of Technology, 26(1), 28–30.
Ma, L., Liu, L., Yang, L., Wu, H., and Cao, J. (2004). “Comprehensive utilization of phosphogypsum.” Guizhou Chemical Industry, 29(2), 14–17.
Manjit, S. (2005). “Role of phosphogypsum impurities on strength and microstructure of selenite plaster.” Constr. Build. Mater., 19, 486–486.
Manjit, S., et al. (1996). “An improved process for the purification of phosphogypsum.” Constr. Build. Mater., 8 597–600.
Peng, J.-h., Wan, T.-Z., Tang, L., and Zhang, J.-X. (2003). “Organic matters and in crystal lattice and their influence on properties of phosphogypsum.” J. Building Material, 6(3), 221–226.
Zhao, J., and Mamuti, M. (2004). “Discussion on synthetic utilization.” Arid Environmental Monitoring, 18(2), 95–97.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 20 • Issue 7 • July 2008
Pages: 464 - 469
Copyright
© 2008 ASCE.
History
Received: Sep 11, 2006
Accepted: Jul 25, 2007
Published online: Jul 1, 2008
Published in print: Jul 2008
Notes
Note. Associate Editor: Chiara F. Ferraris
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.