Conference: Publication Date: 13 March 2017Testing Method:
The durability of concrete is widely recognized to be controlled by the ingress of detrimental agents. Here, preventing penetration of water, oxygen, carbon dioxide along with minimizing ionic migration within the material is key to maximize material performance and longevity. Recently, investigations have demonstrated that electrical methods such as surface resistivity are accurate means for assessing the quality of a concrete mixture based on its performance in resisting ionic flow. However, there are many factors which may influence the accuracy of the measured values due to the test principle itself and the inherent variability of concrete materials. This study investigates the influence of sample conditioning, curing method and curing temperature, on resistivity measurement. It evaluates whether variations of curing temperature within ASTM specified limits have a significant effect on the surface resistivity measurement along with ASTM acceptable means of saturation (moist curing and immersion curing).
[1] Samson, E., Marchand, J., and Beaudoin, J., 2000, "Modeling the influence of chemical reactions on the mechanisms of ionic transport in porous materials: an overview," Cement and Concrete Research, 30(12), pp. 1895-1902.
[2] Neithalath, N., and Jain, J., 2010, "Relating rapid chloride transport parameters of concretes to microstructural features extracted from electrical impedance," Cement and Concrete Research, 40(7), pp. 1041-1051.
[3] Vivas, E., Boyd, A. J., Hamilton III, H., and Bergin, M., 2007, "Permeability of Concrete―Comparison of Conductivity and Diffusion Methods."
[4] Kessler, R. J., Powers, R. G., Vivas, E., Paredes, M. A., and Virmani, Y. P., "Surface resistivity as an indicator of concrete chloride penetration resistance," Proc. Concrete Bridge Conference, St. Louis, Missouri, pp. 20.
[5] Rupnow, T., and Icenogle, P., 2012, "Surface resistivity measurements evaluated as alternative to rapid chloride permeability test for quality assurance and acceptance," Transportation Research Record: Journal of the Transportation Research Board(2290), pp. 30-37.
[6] Spragg, R., Bu, Y., Snyder, K., Bentz, D., and Weiss, J., 2013, "Electrical testing of cement-based materials: role of testing techniques, sample conditioning, and accelerated curing."
[7] AASHTO TP 95, “Standard Test Method for Surface Resistivity of Concrete’s Ability to Resist Chloride Ion Penetration,” American Association of State Highway and Transportation Officials, Washington, DC, 2014, pp. 10.
[8] Bu, Y., Spragg, R., Villani, C., and Weiss, J., 2014, "The influence of accelerated curing on the properties used in the prediction of chloride ingress in concrete using a Nernst–Planck approach," Construction and Building Materials, 66, pp. 752-759.
[9] Layssi, H., Ghods, P., Alizadeh, A. R., and Salehi, M., 2015, "Electrical Resistivity of Concrete," Concrete International, 37(5), pp. 41-46
[10] Standard, A. "C511. 2016." Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes (ASTM C511-13). West Conshohocken, PA: ASTM International.
[11] Bentur, A., Berger, R. L., Kung, J. H., Milestone, N., and Young, J., 1979, "Structural properties of calcium silicate pastes: II, Effect of curing temperature," Journal of the American Ceramic Society, 62(78), pp. 362-
| Usage | Shares |
|---|---|
Total Views 143 Page Views |
Total Shares 0 Tweets |
143 0 PDF Downloads |
0 0 Facebook Shares |
| Total Usage | |
| 143 |