Relationship Study and Primary Application between Gas Permeability and Crack State on Bridge Joint Concrete

Abstract:

For evaluating the crack state on solid bridge joint on site, the relationship between gas permeability and crack width of joint concrete is studied both on material and structural levels in this article. In laboratory tests, gas permeability tests on concrete samples with macrocrack are performed, the relationship between the relative gas permeability rate k/k₀ and the relative variation of crack width a_c is established combining with regression analysis, the fitting curve equation is . when a_c increases by 1.125×10^-2 mm, the gas permeability increases about 10 times compared with the initial state. In field tests, “pulse tests” are performed on bridge joint based on 3 embedded pulse probes to measure the evolution of gas permeability during bridge operation. The results show, firstly, the gas permeability of joint concrete are in the order of 10^-16~10^-19 m², which indicates a good compaction performance; Secondly, an order of magnitude increase of gas permeability of one probe in different ages, or the fact that the gas permeability at one position in solid joint is obviously larger than the other positions, these phenomena indicate the existence of original defects, or the possibility of macrocrack appearance from microcracks, and the crack width increases by about 0.01 mm.

• Periodical: Materials Science Forum (Volume 1018)
• Pages: 153-161
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1018.153
• Online since: January 2021
• Authors: Guo Rong Zhang, Xiao Dong Wang, Jian Kun Han, Yi Xuan Han*
• Keywords: Bridge Engineering, Compactness, Crack Width, Gas Permeability, Joint Concrete

References

[1] HUO Wentang, Joint and widening design of highway bridge, J. Highway, 64(2019)131-134.

[2] LI Liming, Research of broadening and reinforcement of existing concrete bridge, D. Changsha University of Science of Technology(2015).

[3] WANG Fayu. Widening joint technology of expressway bridge, J. Highway, 7 (2011)128-131.

[4] ZHONG Guodong, XU Heng, Defects cause analysis of Xinjitian overpass bridge, J. Guangdong Highway Communications, 5 (2013)30-32.

[5] Mehta P. K., Monteiro P. J. M., Concrete, Microstructure, properties and materials, The McGraw-Hill Companies Inc., New York, (2006).

[6] Zhang M. H., Gjorv O.E., Permeability of High-Strength Lightweight Concrete, J. ACI Materials Journal, 88 (2002)463-469.

[7] LENG Faguang, TIAN Guanfei, Investigation of test methods of chloride ion penetration in concrete, J. Journal of Southeast University (Natural Science Edition), 36(2006)32-38.

[8] Kolle J. J., The determination of the permeability of concrete to oxygen by the Cembureau method-a recommendation, J. Materials and Structures, 22 (1999)225-230.

[9] Wang Xinming, Yang Di, Han Yixuan, Research and application of nondestructive testing technique for concrete durability, J. Modern Transportation Technology, 13(2016)46-49.

[10] ZHANG Guo-rong, HAN Yi-xuan, Skoczylas F, et al. Research on new test technology of gas permeability of concrete[J]. Bulletin of the Chinese Ceramic Society, 2015, 34(S1):116-122.

[11] WANG Zhong-ping, WU Ke-ru, ZHANG Qing-yun, et al. Study of test method for coefficient of gas permeability of concrete[J]. Journal of Building Materials, 2001, 4(4):317-321.

[12] Loosveldt C H, Lafhaj Z, Skoczylas F. Experimental study of gas and liquid permeability of a motar[J], Cement and Concrete Research, 2002, 32(9):1357-1363.

DOI: 10.1016/s0008-8846(02)00793-7

[13] Chen W, Skoczylas F, Dubois T. Gas relative permeability of high-performance concrete: effect of water saturation under phase desorption and sorption. In: international RILEM conference on advances in construction materials through science and engineering[C], Hong Kong, 2011:777-784.

[14] Liu J, Agostini F, Skoczylas F. From relative gas permeability to in situ saturation measurements[J]. Construction & Building Materials, 2013, 40(40):882-890.

DOI: 10.1016/j.conbuildmat.2012.11.092

[15] C.A. Davy, F. Skoczylas, J.D. Barnichon, P. Lebon, Permeability of macro-cracked argillite under confinement: Gas and water testing, Physics and Chemistry of the Earth, Parts A-B-C, Vol.32 (8-14), 2007, pp.667-680.

DOI: 10.1016/j.pce.2006.02.055