Behavior of Cement Pastes and Mortar Containing Phosphogypsum

Abstract:

The aim of this study is to investigate the effects of phosphogypsum on the properties of both cement pastes and mortars. Normal Portland cement CEM Ι 32,5N, Limestone Blended cement CEM ΙΙ B-L32,5N, and Slag cement CEM ΙΙ A-S32,5N were used. These cements were partially substituted by 0,2,4,6,8,10,and 15% of phosphogypsum. The test program was divided to two stages. In the first stage, tests were conducted according to BSEN 196, namely setting times (initial and final), soundness, and compressive strength (at ages 7 and 28 days). In the second stage, X-ray diffraction (XRD), and scanning electron microscope (SEM) were conducted on selected mixes from first stage. The results show that the three types of cements with the various replacement percentages of phosphogypsum met the limit of initial setting time, as well as, provided soundness of 2 mm. Also, in terms of compressive strength, it was proven, that it is possible to partially replace the three tested types of cements by phosphogypsum by up to 8%and 15% with regard to cement/sand ratio of (1:3) and (1:2) respectively.

• Periodical: Key Engineering Materials (Volume 668)
• Pages: 181-188
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.668.181
• Online since: October 2015
• Authors: Hanan El Nouhy*, Enas Khattab, Sayieda Zeedan
• Keywords: Cement Mortar, Compressive Strength, Phosphogypsum

References

[1] T. Sen,U. Mishra , Usage of Industrial Waste Products in Village Road Construction, International Journal of Environmental Science and Development. 1 (2010)122-126.

DOI: 10.7763/ijesd.2010.v1.25

[2] M. Safiuddin, M. Jumaat, M. Salam, Y. Islam, R. Hashim , Utilization of Solid Wastes in Construction, International Journal of Physics Sciences. 5 (2010)1952-(1963).

[3] Annexure 4 Eco-friendly Building Materials and Technologies. Eco-housing Assessment Criteria-VersionΙΙ, (2009). www. ecohousingindia. org/downloads/assessment.

[4] L. Zongshou, S. Huadong, B. Essossinam , Effect of Polycarboxylate Superplasticizer on Properties of Phosphogypsum-based Cement, Key Engineering Materials. 509 (2012)13-19.

DOI: 10.4028/www.scientific.net/kem.509.13

[5] T. Kuryatnyk, C. Angulski da luz, J. Ambroise, J. Pera, Valorization of Phosphogypsum as Hydraulic Binder, Journal of Hazardous Materials. 160 (2008)681-687.

DOI: 10.1016/j.jhazmat.2008.03.014

[6] J. Zhou, H. Gao, Z. Shu, Y. Wang, C. Yan, Investigation of Abrasion Resistance of Cement Mortar with Different Pozzolanic Composition and Subjected to Sulfated Medium, Construction and Building Materials. 34 (2012) 114-119.

DOI: 10.1016/j.conbuildmat.2009.10.016

[7] M. Radwan, and M. Heikal, Hydration Characteristics of Tricalcium Aluminate Phase in Mixes Containing β-hemihydate and Phosphogypsum, Cement and Concrete Research. 35(2005)1601-1609.

DOI: 10.1016/j.cemconres.2004.06.037

[8] I. Toma, G. Taranu, A. Toma, M. Budescu, Influence of Cement and Sand Type on the Strength Characteristics of Mortars with Various Contents of Green Binder, Procedia Engineering. 21(2011)196-203.

DOI: 10.1016/j.proeng.2011.11.2004

[9] I. Toma, D. Covatariu, A. Toma, G. Taranu, M. Budescu , Strength and Elastic Properties of Mortars with Various Percentages of Environmentally Sustainable Mineral Binder, Construction and Building Materials. 43 (2013)348-361.

DOI: 10.1016/j.conbuildmat.2013.02.061

[10] I. Altun, , Y. Sert, Utilization of Weathered Phosphogypsum as a Set Retarder in Portland Cement, Cement and Concrete Research. 34(2004) 677-680.

DOI: 10.1016/j.cemconres.2003.10.017

[11] Y. Huang, Z. Lin, Investigation on Phosphogypsum- steel slag- granulated blast-furnace slag-limestone cement, Construction and Building Materials. 24(2010)1296-1301.

DOI: 10.1016/j.conbuildmat.2009.12.006

[12] M. Taher, Influence of Thermally Treated Phosphogypsum on the Properties of Portland Slag, Cement, Resources, Conservation and Recycling. 52 (2007)28-38.

DOI: 10.1016/j.resconrec.2007.01.008

[13] L. Ajam, M. Ouezdou, H. Felfoul, and R. El Mensi , Characterization of the Tunisian Phosphogypsum and its Valorization in Clay Bricks, Construction and Building Materials. 23(2009) 3240-3247.

DOI: 10.1016/j.conbuildmat.2009.05.009

[14] J. Yang, W. Liu, L. Zhang, B. Xiao, Preparation of Load-bearing Building Materials from Autoclaved Phosphogypsum, Construction and Building Materials. 23 (2009)687-693.

DOI: 10.1016/j.conbuildmat.2008.02.011

[15] S. Bhadauria, R. Thakare, Utilization of Phosphogypsum in Cement Mortar and Concrete, 31stConference on Our World in Concrete & Structures, Singapore. (2006).

[16] L. Yang, Y. Yan, Z. Hu, Utilization of Phosphogypsum for the Preparation of Non-autoclaved Aerated. Concrete, Construction and Building Materials. 44(2013)600-606.

DOI: 10.1016/j.conbuildmat.2013.03.070

[17] BSEN 196-2013 Method of Testing Cement. Chemical Analysis of Cement.

[18] H. Khater, S, Zedane, Geopolymerization of Industrial By-products and Study of their Stability upon Firing Treatment, Greener Journal of Physical Sciences. 2(2012)1-9.