Characteristics of EVA-Polymer Modified Mortars Recycling Rapid-chilled Steel Slag Fine Aggregate

급냉 제강슬래그를 재활용한 EVA-폴리머 시멘트 모르타르의 특성

  • Hwang, Eui-Hwan (Department of Chemical Engineering, Kongju National University) ;
  • Kim, Jin-Man (Department of Architectural Engineering, Kongju National University)
  • Received : 2008.09.08
  • Accepted : 2008.09.29
  • Published : 2008.12.10

Abstract

For the recycling of rapid-chilled steel slag, the mechanical strengths and physical properties of EVA-polymer modified mortars with the various replacement ratios of rapid-chilled steel slag were investigated. Twenty five specimens of polymer modified mortars were prepared with the five different amounts of EVA-polymer modifier (0, 5, 10, 15, 20 wt%) and rapid-chilled steel slag (0, 25, 50, 75, 100 wt%). For the investigation of the characteristics of polymer modified mortars, the measurements such as water-cement ratio, unit volume weight, air content for fresh mortar and compressive strength, flexural strength, water absorption, hot water resistance, porosity and SEM investigation for curing specimens were conducted. As a results, with an increase in the replacement ratio of rapid-chilled steel slag, water-cement ratios decreased but unit volume weight increased remarkably. With increasing EVA-polymer modifier and the replacement ratio of rapid-chilled steel slag, percent of water absorption decreased but compressive and flexural strengths increased remarkably. By the hot water resistance test, mechanical strengths decreased but total pore volume and porosity increased remarkably. In the SEM observation, the components of specimen were shown to stick to each other in the form of co-matrix phase before hot water resistance test, but polymer modifier of co-matrix phase was decomposed or deteriorated after hot water resistance test.

Keywords

polymer modifier;polymer-modified mortar;rapid-chilled steel slag;replacement ratio

Acknowledgement

Supported by : 공주대학교 자원재활용신소재혁신센터(RIC/NMR)

References

  1. E. H. Hwang and T. S. Hwang, J. of Ind. Eng. Chem., 13, 585 (2007).
  2. E. H. Hwang, D. S. Kil, and T. S. Hwang, J. Korean Ind. Eng. Chem., 11, 792 (2000).
  3. E. H. Hwang, J. J. Choi, and T. S. Hwang, J. Korean Ind. Eng. Chem., 16, 317 (2005).
  4. E. H. Hwang, T. S. Hwang, and Eiji Kamada, J. of the Korean Ceramic Society, 31, 949 (1994).
  5. R. N. Swamy, 8th Int. cong. on. Polymers in Concrete, D. Van Gemert and K. U. Leuven Eds., 8, 21, Oostende, Belgium (1995).
  6. Y. Ohama, M. Demura, and M. Komiyama, J. of the Society of Materials Science, 29, 266 (1980). https://doi.org/10.2472/jsms.29.266
  7. Y. Ohama, 12th Int. Cong. on Polymers in Concrete, Kyu-Seok Yeon Ed., 12, 37, Chuncheon, Korea (2007).
  8. E. H. Hwang, Y. S. Ko, and J. K. Jeon, J. of Ind. Eng. Chem., 13, 387 (2007).
  9. E. H. Hwang, T. S. Hwang, and Y. Ohama, J. Korean Ind. Eng. Chem., 5, 786 (1994).
  10. Y. Ohama, 5th Asian symp. on Polymers in Concrete, N. Laksmanan, C. V. Vaidyanathan, Y. Ohama, and M. Neelamegam Eds., 3, Chennai, India (2006).
  11. J. M. Kim, S. H. Cho, K. J. Kwon, and M. H. Kim, J. of Archi. Institute of Korea, 21, 121 (2005).
  12. Y. Ohama, 9th Int. cong. on Polymers in Concrete, Franco Sandrolini Ed., 9, 1, Bologna, Italy (1998).
  13. P. Mani, A. K. Gupta, and S. Krishnamoorthy, Int. J. of Adhesion and Adhesives, 7, 157 (1987). https://doi.org/10.1016/0143-7496(87)90071-6
  14. E. H. Hwang, D. S. Kil, and I. S. Oh, J. Korean Ind. Eng. Chem., 8, 979 (1997).
  15. V. V. Paturoev and V. P. Trambovetsky, 8th Int., cong. on. Polymers in Concrete, D. Van Gemert and K. U. Leuven Eds., 8, 451, Oostende, Belgium (1995).
  16. E. H. Hwang, T. S. Hwang, and D. S. Kil, J. Korean Ind. Eng. Chem., 10, 1066 (1999).
  17. D. W. Fowler and G. W. Depuy, 8th Int. cong. on. Polymers in Concrete, D. Van Gemert and K. U. Leuven Eds., 8, 67, Oostende, Belgium (1995).
  18. T. Satoh, Y. Ohama, and K. Demura, Summary of Technical Papers of Architectural Institute of Japan, 137 (1994).
  19. D. W. Fowler, 8th Int. cong. on. Polymers in Concrete, D. Van Gemert and K. U. Leuven Eds., 8, 13, Oostende, Belgium (1995).
  20. D. W. Fowler and T. U. Taylor, 6th Int. Cong. on Polymers in Concrete, Huang Yiun-Yuan, Wu Keru, and Chen Zhiyuan Eds. 6, 10 Shanghai, China (1990).
  21. K. S. Yeon, 5th Asian symp. on Polymers in Concrete, N. Laksmanan, C. V. Vaidyanathan, Y. Ohama, and M. Neelamegam Eds., 13, Chennai, India (2006).
  22. Y. Ohama and K. Shiroishida, SP-89, American Concrete Institute, 313 (1985).