A novel short-term immersion test to determine the chloride ion diffusion coefficient of cementitious materials

作者：Park Byoungsun; Jang Seung Yup; Cho Jae Yeol^*; Kim Jae Young

来源：Construction and Building Materials, 2014, 57: 169-178.

DOI：10.1016/j.conbuildmat.2014.01.086

• Chloride ions
• Diffusion coefficient
• Durability
• Cementitious materials
• Short-term immersion test

The chloride ion diffusion coefficient is a crucial factor in the durability of concrete structures exposed to seawater. A number of test methods have been developed to determine the chloride ion diffusion coefficient of concrete. Most of these test methods require an excessive test duration or represent a chloride ion penetration mechanism that applied an electrical potential to accelerate chloride ion penetration. This study proposes a new test method to determine the chloride ion diffusion coefficient while avoiding these deficiencies. The proposed method incorporates a new analytical approach that calculates the diffusion coefficient from the change in chloride ion concentration in a source solution. The proposed method can be called a short-term immersion test in comparison with traditional long-term immersion tests. The short-term immersion test was validated by comparison with a long-term immersion test and an electrical migration-diffusion test. It was found that the proposed test method and analytical solution can estimate the chloride ion diffusion coefficient within two weeks.

• 出版日期2014-4-30