Properties of Polyurethane and Epoxy Modified Cementitious Hybrids for Flooring Systems

Abstract:

This article focuses on a special kind of polymer modified mortars (PMM) which were developed especially for industrial floorings. These floorings are designed as self-leveling screeds, repair mortars or final coatings of the floor. The article investigates systems of two different binder systems (cement and PU or EP) with polymer-cement ratios between 0,2 to 0,75 [1-. Products of this range could be called cementitious hybrids. Polymers are added into cementitious mortars for different purpose. They are used mainly to improve performance of final product like the workability, adhesion, tensile strength and many other properties of cement materials. They combine several advantages compared to conventional materials like pure epoxy or self-leveling cementitious screeds. Hybrids also show good final properties like endurance against organic and inorganic acids, high abrasion resistance, good slip resistance, toughness etc.. This kind of material can be applied on relative water-saturated substrates or a few days old concrete without cracks or blister formation. It is also known, that properly designed formulations could provide a temporary moisture barrier, which is used to minimize osmotic blister formation in polymer based top coats caused by high moisture content of the substrate. The article elaborates progress of forming co-matrix of these cementitious hybrids. These show some improved properties like waterproofness and improved adhesion to the substrate compared to the conventional cementitious mortar without an organic binder. The general advantages of using this type of material for industrial floorings are also mentioned in the article.

• Periodical: Advanced Materials Research (Volume 897)
• Pages: 87-92
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.897.87
• Online since: February 2014
• Authors: Vít Petranek, Jakub Hlawiczka
• Keywords: Cementitious Hybrid, Epoxy Modified Cementitious Screed, Epoxy Mortar, Flooring Technology, Industrial Floorings, Polymer-Modified Mortar, Polyurethane Modified Cementitious Screed, Polyurethane Mortar

References

[1] Ohama Y., Handbook of polymer-modified concrete and mortars. Park Ridge, NJ.: Noyes Publications; (2005).

[2] Hongyan M., Zongjin L., Microstructures and mechanical properties of polymer modified mortars under distinct mechanisms, Construction and Building Materials, Volume 47, October 2013, Pages 579-587, ISSN 0950-0618, http: /dx. doi. org/10. 1016/j. conbuildmat. 2013. 05. 048 (http: /www. sciencedirect. com/science/article/pii/S0950061813004467).

DOI: 10.1016/j.conbuildmat.2013.05.048

[3] Jeongyun D., Yangseob S., Performance of polymer-modified self-leveling mortars with high polymer–cement ratio for floor finishing, Cement and Concrete Research, Volume 33, Issue 10, October 2003, Pages 1497-1505, ISSN 0008-8846, http: /dx. doi. org/10. 1016/S0008-8846(02)01057-8 (http: /www. sciencedirect. com/science/article/pii/S0008884602010578).

DOI: 10.1016/s0008-8846(02)01057-8

[4] Miller M. Polymers in cementitious materials. Shawbury, UK: Rapra Technology; (2005).

[5] ACI-Comitee-548., Polymer-modified concrete, ACI 548. 3R-03. Farmington Hills, MI.: American Concrete Institute; (2003).

[6] KURTIS, K. Portland Cement Hydration: School of Civil Engineering. In: [online]. Georgia Institute of Technology, Atlanta, Georgia [cit. 2013-11-25]. http: /people. ce. gatech. edu/~kk92/hyd07. pdf.

[7] Shigang A., Liqun T., Yiqi M., Yongmao P., Yiping L., Daining F., Effect of aggregate distribution and shape on failure behavior of polyurethane polymer concrete under tension, Computational Materials Science, Volume 67, February 2013, Pages 133-139, ISSN 0927-0256, http: /dx. doi. org/10. 1016/j. commatsci. 2012. 08. 029 (http: /www. sciencedirect. com/science/article/pii/S0927025612005216).

DOI: 10.1016/j.commatsci.2012.08.029

[8] Wagner H., Industrial and Engineering chemistry, Product Research and Development, 4(3): 191-196; (1965).

[9] BEELDENS A., Polymers in concrete: The Synergistic Effect between Japan and Belgium, Proceedings of ICPIC 2007. XII. Intenational Congress on Polymers in Concrete, 1sted. Chuncheon, Korea: Kangwon National University, 2007, ISBN 89-960-0450-2, pp.919-928.

[10] Ramli M., Tabassi A. A., Hoe K.W., Porosity, pore structure and water absorption of polymer-modified mortars: An experimental study under different curing conditions, Composites Part B: Engineering, Volume 55, December 2013, Pages 221-233, ISSN 1359-8368, http: /dx. doi. org/10. 1016/j. compositesb. 2013. 06. 022. (http: /www. sciencedirect. com/science/article/pii/S1359836813003338).

DOI: 10.1016/j.compositesb.2013.06.022

[11] Liguang X. 肖力光, Yujie J., Lixia G., Preparation and properties of a new composite of epoxy emulsion (EEM) modified cement. Journal of Wuhan University of Technology-Mater. Sci. Ed. October 2009, Volume 24, Issue 5, Pages 843-845, DOI: 10: 1007/s11595-009-5843-5.

DOI: 10.1007/s11595-009-5843-5

[12] S. N. Pareek, Y. Ohama, K. Demura, Adhesion of bonded mortars to polymer-cement paste coated mortar substrates, Proceedings of the International Conference on Interfaces in Cementitious Composites, E&FN Spon, London, 1992, p.89–98.

DOI: 10.1201/9781482271256-17