콘크리트학회논문집 (Journal of the Korea Concrete Institute)

  • 제22권1호
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  • Pages.77-84
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  • 2010
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  • 1229-5515(pISSN)
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  • 2234-2842(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
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라텍스 개질 콘크리트 교량 교면 포장부 균열에 대한 수치해석 연구

Numerical Investigation on Cracking of Bridge Deck Slabs with Latex Modified Concrete Overlays

  • 발행 : 2010.02.28
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초록

라텍스개질콘크리트(LMC)는 일반 콘크리트에 비하여 인장강도와 내구성 등 개선된 재료 특성을 가지고 있으며, 따라서 교량 데크 슬래브의 생애주기를 증대시키기 위하여 교면 포장재로 많이 사용되고 있다. 이러한 사용에는 LMC 포장부와 콘크리트 모반 사이의 우수한 부착성능이 전제된다. 한편 교량 데크 슬래브의 구조적 성능을 향상시키기 위하여 고성능 콘크리트(HPC) 슬래브가 현재 사용되고 있다. 이 연구에서는 일반 콘크리트(NSC) 또는 HPC 교량 데크 슬래브에 타설된 LMC 포장부의 부착거동을 모사하기 위하여, 유한요소해석을 이용한 변수 연구가 수행되었다. 이 연구에서 콘크리트 모반의 수축, 강성, 균열강도와 LMC 포장부의 두께가 콘크리트-LMC 포장부의 균열 발생에 미치는 영향을 분석하였다. 수치해석연구 결과, HPC 슬래브는 높은 수축량과 강성으로 인하여 콘크리트-LMC 교면 포장부에 균열을 유발할 가능성이 높은 것으로 사료된다.

Latex modified concrete (LMC) exhibits improved material properties including high tensile strength and durability compared with conventional concrete, and hence LMC has been used as protective layers over the bridge deck slabs to increase their service life with underlying assumption of excellent bond behavior between the LMC overlay and the concrete substrate. In this study, the effect of the primary parameters of the concrete substrate (i.e., shrinkage, stiffness and cracking capacity) as well as the LMC overlay thickness on the probability of cracking of the bridge deck slabs using LMC overlays was investigated by carrying out the finite element analysis that simulated the bond behavior of LMC overlays on normal strength concrete (NSC) and HPC bridge deck slabs. Based on the results of the numerical analysis, it is concluded that the relatively high shrinkage strains and stiffness of HPC slabs can increase its probability of cracking in bridge deck slabs using LMC overlay.

키워드

참고문헌

  1. Kirkpatrick, S. M., British Patent 242, 345, Nov. 6, 1925.
  2. American Concrete Institute Committee 548, Polymer-modified concrete, ACI 548.3R-03, ACI, 2003, 40 pp.
  3. Walters, D. G., "The Effect of Polymer Variables and Other Parameters on the Properties of Polymer-Modified Cement Mixtures," Polymer-Modified Hydraulic-Cement Mixtures, ASTM STP1176, L.A. Kuhlmann and D.G. Walters, eds., ASTM International, West Conshohocken, PA, 1992, 162 pp.
  4. Shi, Z. and Chung, D. L. L., "Improving the Abrasion Resistance of Mortar by Adding Latex and Carbon Fibers," Cement and Concrete Research, Vol. 27, No. 8, 1997, pp. 1149-1153. https://doi.org/10.1016/S0008-8846(97)00097-5
  5. Ohama, Y., "Study on Properties and Mix Proportioning of Polymer-Modified Mortars for Buildings," Report of the Building Research Institute, No. 65, Tokyo, Japan, Building Research Institute (in Japanese), 1973, pp. 100-104.
  6. Torgal, F. P., Castro-Gomes, J., and Jalali, S., "Evaluation of Inorganic Polymer As Adhesive Material for Repair of Reinforced Concrete," International Congress on Polymers in Concrete, Chuncheon, Korea, 2007, pp. 365-372.
  7. Kweon, J., Lee, B., Doh, Y., and Kim, K., "Estimation of Resistance Against Reflection Cracking of Polymer Modified Concrete," International Congress on Polymers in Concrete, Chuncheon, Korea, 2007, pp. 665-672.
  8. Fowler, D. W., "State of the Art in Concrete Polymer Materials in the US," International Congress on Polymers in Concrete, Chuncheon, Korea, 2007, pp. 29-36.
  9. Baalbaki, W., Benmokrane, B., Chaallal, O., and Aïtcin, P.– C., Influence of Coarse Aggregate on Elastic Properties of High-performance Concrete," ACI Materials Journal, Vol. 88, No. 5, 1991, pp. 499-503.
  10. Aïtcin, P.-C., High-Performance Concrete, E&FN Spon, NewYork, NY, USA, 1998, 628 pp.
  11. Whiting, D. A., Detwiler, R. J., and Lagergren, E. S., "Cracking Tendency and Drying Shrinkage of Silica Fume Concrete for Bridge Deck Applications," ACI Materials Journal, Vol. 97, No. 1, 2000, pp. 71-77.
  12. SAS, ANSYS 11 Finite Element Analysis SYStem, SAP IP, Inc., 2000.
  13. Canadian Highway Bridge Design Code, CAN/CSA-S6-06, CSA International, 2006, 800 pp.
  14. Chen, W. F., Plasticity in Reinforced Concrete, McGraw-Hill, NewYork, 1982, 474 pp.
  15. Kupfer, H. B., Hildorf, H. K., and Rusch.,H., "Behavior of Concrete under Biaxial Stresses," ACI J., Vol. 66, No. 8, 1969, pp. 656-666.
  16. Choi, K., Park, H., and Shin, Y., "Moment Magnifier Method for Long-term Behavior of Flat Plate Subjected to In-plane Compression," J. Struct. Engr. ASCE, Vol. 129, No. 1, 2003, pp. 87-95. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:1(87)
  17. American Concrete Institute, Building Code Requirements for Structural Concrete, ACI 318-08, 2008, 473 pp.
  18. CEP-FIP Model Code 90. Model Code for Concrete Structures, "Comite Euro-International du Beton (CEB)-Federation Internationale de la Precontrainte (FIP)," Thomas Telford Ltd., London, UK, 1993, 464 pp.
  19. Hashimoto, H. and Ohama, Y.," Strengths of Polymer-modified Concretes," Concrete Journal, Vol. 15, No. 11, 1977, pp. 117-124. https://doi.org/10.3151/coj1975.15.11_117
  20. Walters, D. G., "A Comparison of Latex-Modified Portland Cement Mortars," ACI Materials Journal, Vol. 87, No. 4, 1990, pp. 371-377.
  21. Miyazawa, S. and Tazawa, E., "Prediction Model for Shrinkage of Concrete Including Autogenous Shrinkage," Creep, Shrinkage and Durability Mechanics of Concrete and Other Quasi-brittle Materials, Ulm, F.-J., Bazant, Z. P. and Wittmann, F. H., Ed., Elsevier Science Ltd, 2001, pp. 735-740.
  22. Bazant, Z. P. and Baweja, S., "Justification and Refinements of Model B3 for Concrete Creep and Shrinkage 2. Updating and Theoretical Basis," Materials and Structures, Vol. 28, No. 8, 1995, pp. 488-495. https://doi.org/10.1007/BF02473171
  23. Sakata, K. and Shimomura, T., "Recent Progress in Research on and Code Evaluation of Concrete Creep and Shrinkage in Japan," Journal of Advanced Concrete Technology, Vol. 2, No. 2, 2004, pp. 113-140. https://doi.org/10.3151/jact.2.113
  24. De Schutter, G., "Fundamental Study of Early Age Concrete Behaviour as a Basis for Durable Concrete Structures", Materials and Structures, Vol. 35, No. 1, 2002, pp. 15-21. https://doi.org/10.1007/BF02482085
  25. Gilliland, J. A. and Dilger, W. H., "Monitoring Concrete Temperature during Construction of the Confederation Bridge," Proceedings of the CSCE Annual Conference, Sherbrooke, Canada, Vol. 1, 1997, pp. 187-196.