THE STUDY OF CHLORIDE ION TRANSPORT BEHAVIOR OF MORTAR UNDER DIFFERENT STORING ENVIRONMENT TEMPERATURES

Authors

Shih-Han Weng, Institute of Materials Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.C.
Chung-Chia Yang, Institute of Materials Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.C.Follow
Shih-Wei Cho, Department of Architecture, China University of Science and Technology, Taipei, Taiwan, R.O.C.
Kuo-Cheng Yang, Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.C

Abstract

This study presents the chloride ion transport behavior of mortar from accelerated chloride migration test (ACMT). The water/cement ratio of mortars is 0.45, and the five volume fractions of fine aggregates (0%, 15%, 30%, 50% and 60%) were evaluated. After stored under different environment temperatures (25°C, 40°C, 60°Cand 80°C), the chloride ion passing through specimens was carried out with ACMT. From the Nernest-Planck equation and modified Fick’s second law, test data could be calculate the chloride migration coefficient of non-steady-state and steady-state. For mortar structure, dilution and tortuosity effects are positive effect to resist the penetration of Chloride ion. On the contrary, ITZ and percolation effects are negative effect to resist the penetration of Chloride ion. Thus the migration coefficients of mortar at 60% volume fractions of fine aggregates is higher than other mixes because of ITZ and percolation effects.

Recommended Citation

Weng, Shih-Han; Yang, Chung-Chia; Cho, Shih-Wei; and Yang, Kuo-Cheng (2012) "THE STUDY OF CHLORIDE ION TRANSPORT BEHAVIOR OF MORTAR UNDER DIFFERENT STORING ENVIRONMENT TEMPERATURES," Journal of Marine Science and Technology: Vol. 20: Iss. 3, Article 7.
DOI: 10.51400/2709-6998.1806
Available at: https://jmstt.ntou.edu.tw/journal/vol20/iss3/7