Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Mineral Admixture on Bond between Structural Synthetic Fiber and Latex Modified Cement Mortar under Sulfate Environments

황산염에 노출된 구조용 합성섬유와 라텍스 개질 시멘트 모르타르의 부착특성에 미치는 광물질 혼화재의 효과

  • 김동현 (공주대학교 대학원 농공학과) ;
  • 이정우 (공주대학교 대학원 농공학과) ;
  • 박찬기 (공주대학교 지역건설공학과)
  • Received : 2012.04.18
  • Accepted : 2012.08.06
  • Published : 2012.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

It has been well known that concrete structures exposed to acid and sulfate environments such as sewer etc. show significant decrease in their durability due to chemical attack. Such deleterious acid and sulfate attacks lead to expansion and cracking in concrete, and thus, eventually result in damage to cement mortar by forming expansive hydration products due to the reaction between cement hydration products and acid and sulfate ions. In this study, the effect of fly ash and blast furnace slag on the bond performances of structural synthetic fiber in latex modified cement mortar under sulfate environments. Fly ash and blast furnace slag contents ranging from 0 % to 20 % are used in the mix proportions. The latex modified cement mortar specimens were immersed in fresh water, 8 % sodium sulfate ($Na_2SO_4$) solutions for 28 and 50 days, respectively. Pullout tests are conducted to measure the bond performance of structural synthetic fiber from latex modified cement mortar after sulfate environments exposure. Test results are found that the incorporation of fly ash and blast furnace slag can effectively enhance the PVA fiber-latex modified cement mortar interfacial bond properties (bond behavior, bond strength and interface toughness) after sulfate environments exposure. The microstructural observation confirms the findings on the interface bond mechanism drawn from the fiber pullout test results under sulfate environments.

Keywords

References

  1. Al-Amoudi, O. S. B., 1998, Sulfate Attack and Reinforcement Corrosion in Plain and Blended Cements Exposed to Sulfate Environments, Building and Environment 33(1): 53-61. https://doi.org/10.1016/S0360-1323(97)00022-X
  2. Bae, S. H, Park, J. I, and Lee, K. M, 2010, Influence of Mineral Admixtures on the Resistance to Sulfuric Acid and Sulfate Attack in Concrete, Journal of the Korea Concrete Institute 22(2): 219-228 (In korean). https://doi.org/10.4334/JKCI.2010.22.2.219
  3. Bentur, A., and S. Mindess., 1990, Fibre reinforced cementitious composites, Elsevier Applied Science, London.
  4. Chan, Y. W., and S. H., Chu, 2004, Effect of silica fume on steel fiber bond characteristics in reactive powder concrete, Cement and Concrete Research 34(7): 1167-1172. https://doi.org/10.1016/j.cemconres.2003.12.023
  5. Kim, J. H., C. G., Park, S. W., Lee, S. W., Lee, and J. P., Won, 2008, Effects of the geometry recycled PET fiber reinforcement on shrinkage of cement-based composites, Composites Part B: Engineering 39(3): 442-450 (In korean). https://doi.org/10.1016/j.compositesb.2007.05.001
  6. Lee, J. H. and C. G., Park, 2011a, Effect of Polyvinyl Alcohol Fiber Volume Fraction on Pullout Behavior of Structural Synthetic Fiber in Hybrid Fiber Reinforced Cement Composites, Journal of Korea Concrete Institute 23(4): 461-469 (In korean). https://doi.org/10.4334/JKCI.2011.23.4.461
  7. Lee, J. H. and C. G., Park, 2011b, Effect of Mineral Admixture on Bond Properties between Polyolefin Based Synthetic Fiber and Cement Mortar, Journal of Korea Concrete Institute 23(3): 339-346 (In korean). https://doi.org/10.4334/JKCI.2011.23.3.339
  8. Mangat, P. S. and Khatib, J. M., 1995, Influence of Fly Ash, Silica Fume, and Slag on Sulfate Resistance of Concrete, ACI Materials Journal 92(5): 542-552.
  9. Mehta, P. K., 1983, Mechanism of Sulfate of Attack on Portland Cement Concrete-Another Look, Cement and Concrete Research 13(3): 401-406 https://doi.org/10.1016/0008-8846(83)90040-6
  10. Park, S. K., J. P. Won, and C. G. Park, 2008a, Prediction of Corrosion Threshold Reached at Steel Reinforcement Embedded in Latex Modified Concrete with Mix Proportion Factor, Journal of KSAE 50(6): 49-60 (In korean).
  11. Park, S. K., J. P. Won, and C. G. Park, 2008b, Strength Properties and Determination Method of Mix Proportion Factor of Latex Modified Concrete, Journal of KSAE 50(5): 39-50 (In korean).
  12. Park, S. K., J. P. Won, and C. G. Park, 2008c, Evaluation of Diffusion Property of Latex Modified Concrete, Journal of KSAE 50(4): 27-37. (In korean)
  13. Park, C. G., and J. P. Won, 2008, Flexural Performance and Fire Resistance of Polyolefin Based Structural Synthetic Fiber Reinforced Concrete, Journal of KSAE 50(1): 49-57 (In korean).
  14. Santhanam, M., Cohen, M. D., and Olek, J., 2003, Mechanism of Sulfate Attack : A Fresh Look Part 2 : Proposed Mechanisms, Cement and Concrete Research 33(3): 341-346. https://doi.org/10.1016/S0008-8846(02)00958-4
  15. Shazali, M. A., Baluch, M. H., and Al-Gadhib, A. H., 2006, Predicting Residual Strength in Unsaturated Concrete Exposed to Sulfate Attack, Journal of Materials in Civil Engineering 18(3): 343-354. https://doi.org/10.1061/(ASCE)0899-1561(2006)18:3(343)
  16. Wee, T. H., Suryavanshi, A. K., Wong, S. F., and Anisur Rahman, A. K. M., 2000, Sulfate Resistance of Concrete Containing Mineral Admixtures, ACI Materials Journal 97(5): 536-549.

Cited by

  1. The Compressive Strength and Durability Properties of Polypropylene Fiber Reinforced EVA Concrete vol.57, pp.4, 2015, https://doi.org/10.5389/KSAE.2015.57.4.011
  2. Mechanical Properties and Durability of Abrasion of EVA Concrete Reinforced Steel Fiber vol.56, pp.5, 2014, https://doi.org/10.5389/KSAE.2014.56.5.045
  3. Mechanical Properties and Impact Resistance of Hybrid Fiber Reinforced Concrete with Type of Reinforcing Fibers for Precast Concrete vol.55, pp.4, 2013, https://doi.org/10.5389/KSAE.2013.55.4.029
  4. Pullout Performance of Reinforcing Fiber Embedded in Nano Materials Cement Mortar with Nano Clay Contents vol.55, pp.3, 2013, https://doi.org/10.5389/KSAE.2013.55.3.113