Abstract
Phosphorus Gypsum (PG) based Self-Leveling mortar (GSL) is a green and efficient material for floor construction. Its hydration kinetics, rheology property and their effect on mechanical strength of hydrated GSL were crucial to its final application. This study analyzed the effect on setting time of three retarders, namely Protein Salt (PS), Citric Acid (CA), and Sodium Tripolyphosphate (STPP). The fluidity of GSL was investigated individually using three different types of superplasticizer, namely naphthalene (FDN), polycarboxylate (PCE) and melamine (MSF). Finally, the effect of these chemical admixtures on mechanical properties of GSL hardened was examined. Results showed that the optimal contents of PS were 0.1%-0.15% by weight. With 0.1% PS, setting time of GSL retarded to 80min. To reach a maximum fluidity of GSL to 350mm, the optimal contents of PCE, MSF and FDN were 0.2%, 0.6% and 1.0% respectively and corresponding compressive strength of GSL were 54.25MPa, 53MPa and 52.25MPa. Suggesting PCE is the most effective dispersant in PG based GSL system.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Aiad, I., Abd EI-Aleem, S., and EI-Didamony, H. (2002). “Effect of delaying addition of some concrete admixtures on the rheological properties of cement pastes.” Cement and Concrete Research, Vol. 32, No. 11, pp. 1839–1843, DOI: 10.1016/S0008-8846(02)00886-4.
Anderberg, A. and Wadsö, L. (2007). “Drying and hydration of cement based self-leveling flooring compounds.” Drying Technology, Vol. 25, No. 12, pp. 1995–2003, DOI: 10.1080/07373930701728372.
ASTM C472-99 (2014). Standard test methods for physical testing of gypsum, gypsum plasters and gypsum concrete.
ASTM D7573 (2009). Standard Test Method for Total Carbon and Organic Carbon in Water by High Temperature Catalytic Combustion and Infrared Detection.
Cao, Z., Cao, Y. D., Zhang, J. S., Sun, C. B., and Li, X. L. (2015). “Preparation and characterization of high-strength calcium silicate boards from coal-fired industrial solid wastes.” International Journal of Minerals, Metallurgy and Materials, Vol. 22, No. 8, pp. 892–900, DOI: 10.1007/s12613-015-1147-2.
Charola, A. E., Pühringer, J., and Michael, S. (2007). “Gypsum: A review of its role in the deterioration of building materials.” Environmental Geology, Vol. 52, No. 2, pp. 339–352, DOI: 10.1007/s00254-006-0566-9.
Ding, Y., Fang, Y. C., and Fang, H. (2015). “Study on the retarding mechanism and strength loss of gypsum from hydrolyzed wheat protein retarder.” Journal of The Korean Ceramic Society, Vol. 52, No. 1, pp. 28–32, DOI: 10.4191/kcers.2015.52.1.28.
Do, J. and Soh, Y. (2003). “Performance of polymer-modified selfleveling mortars with high polymer-cement ratio for floor finishing.” Cement and Concrete Research, Vol. 33, No. 10, pp. 1497–1505, DOI: 10.1016/S0008-8846(02)01057-8.
Guan, B. H., Ye, Q. Q., Zhang, J. L., Lou, W. B., and Wu, Z. B. (2010). “Interaction between a-calcium sulfate hemihydrate and superplasticizer from the point of adsorption characteristics, hydration and hardening process.” Cement and Concrete Research, Vol. 2, No. 40, pp. 253–259, DOI: 10.1016/j.cemconres.2009.08. 027.
Guerinet, J. P., Mosquet, M., Bose, F., and Chappuis, J. (2001). Cementbased self-leveling composition, US. Pat. No. US6309457B1.
ISO 679:2009. Cement-Test methods-Determination of strength. ISO 9597:2008. Cement-Test methods-Determination of setting time and soundness.
Karni, J. and Karni, E. Y. (1995). “Gypsum in construction: origin and properties.” Materials and Structures, Vol. 28, No. 2, pp. 92–100, DOI: 10.1007/BF02473176.
Katsiadramis, N. J., Sotiropoulou, A. B., and Pandermarakis, Z. G. (2010). “Rheological and mechanical response modifications for a self-leveling mortar.” EPJ Web of Conferences, DOI: 10.1051/epjconf/20100623002.
Kurihara, K., Kuniya, M., and Tazawa, S. (1987). Cement self-leveling material, Japan, Pat. No. JP63319240(A).
Lanzón, M. and García-Ruiz, P. A. (2012). “Effect of citric acid on setting inhibition and mechanical properties of gypsum building plasters.” Cement and Concrete Research, Vol. 1, No. 28, pp. 506–511, DOI: 10.1016/j.conbuildmat.2011.06.072.
Li, L. L. and Li, G. Z. (2015). “Study on the preparation and properties of desulfurization gypsum-based self-leveling material.” Applied Mechanics and Materials. 5th International Conference on Mechanical, Industrial, and Manufacturing Technologies (MIMT). No. 541-542: 100–103. DOI: 10.4028/www.scientific.net/AMM.541-542.100.
Ma, B. G., Ru, X. H., and Lu, S. W. (2012). “Preparation of alphacalcium sulfate hemihydrate from phosphogypsum in CaCl2 solution under atmospheric pressure.” 2nd International Conference on Chemical Engineering and Advanced Materials (CEAM 2012), No. 554-556: 570–574, DOI: 10.4028/www.scientific.net/AMR.554-556.570.
Nilles, V. and Plank, J. (2012). “Study of the retarding mechanism of linear sodium polyphosphates on a-calcium sulfate hemihydrate.” Cement and Concrete Research, Vol. 5, No. 42, pp. 736–744, DOI: 10.1016/j.cemconres.2012.02.008.
Onishi, K. and Bier, T. A. (2010). “Investigation into relations among technological properties, hydration kinetics and early age hydration of self-leveling underlayments.” Cement and Concrete Research, Vol. 40, No. 7, pp. 1034–1040, DOI: 10.1016/j.cemconres.2010. 03.004.
Peng, J. H., Qu, J. D., Zhang, J. X., Chen, M. F., and Wan, T. Z. (2005). “Adsorption characteristics of water-reducing agents on gypsum surface and its effect on the rheology of gypsum plaster.” Cement and Concrete Research, Vol. 35, No. 3, pp. 527–531, DOI: 10.1016/j.cemconres.2004.04.016.
Plank, J. and Winter, Ch. (2008). “Competitive adsorption between superplasticizer and retarder molecules on mineral binder surface.” Cement and Concrete Research, Vol. 38, No. 5, pp. 599–605, DOI: 10.1016/j.cemconres.2007.12.003.
Ru, X. H., Ma, B. G., Huang, J., and Huang Y. (2012). “Phosphogypsum transition to a-calcium sulfate Hemihydrate in the presence of omongwaite in NaCl solutions under atmosphere pressure.” Journal of the American Ceramic Society, Vol. 95, No. 11, pp. 3478–3482, DOI: 10.1111/j.1551-2916.2012.05429.x.
Singh, M. (2003). “Effect of phosphatic and fluoride impurities of phosphogypsum on the properties of selenite plaster.” Cement and Concrete Research, Vol. 9, No. 33, pp. 1363–1369, DOI: 10.1016/S0008(03)00068-1.
Singh, M. and Garg, M. (1997). “Retarding action of various chemicals on setting and hardening characteristics of gypsum plaster at different pH.” Cement and Concrete Research, Vol. 6, No. 27, pp. 947–950, DOI: 10.1016/S0008-8846(97)00045-8.
Tan, H. B., Ma, B. G., Li, X. G., Jian, S. W., and Yang, H. (2014). “Effect of competitive adsorption between sodium tripolyphosphate and naphthalene superplasticizer on fluidity of cement paste.” Journal of Wuhan University of Technology-Mater. Sci. Ed., Vol. 29, No. 2, pp. 334–340, DOI: 10.1007/s11595-014-0917-4.
Uretskaya, Y. and Plotnikova, E. (2012). “Self-leveling floors and screeds based on gypsum binders: theory and practice.” Advanced Construction. 3rd International Conference on Advanced Constructon. Kaunas Univ Technol, Kaunas, LITHUANIA. No. OCT 18-19:137–143.
Xie, J. H., Kang, H. N., Shi, Z. L., and Xiang, R. K. (2011). “Study on FGD gypsum self-leveling material.” New Building Materials, Vol. 9, pp. 67–69.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhi, Z., Huang, J., Guo, Y. et al. Effect of chemical admixtures on setting time, fluidity and mechanical properties of phosphorus gypsum based self-leveling mortar. KSCE J Civ Eng 21, 1836–1843 (2017). https://doi.org/10.1007/s12205-016-0849-y
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12205-016-0849-y