Title: Reliability of Non-Steady-State Electrophoretic Migration Test
Author(s): H. Minagawa, E. Nakamura, K. Kawaai, S. Miyazato, Y. Kato, and T. Yamaguchi
Publication: Materials Journal
Appears on pages(s): 223-233
Keywords: chloride-ion diffusion coefficient; chloride migration coefficient; electrical resistivity; non-steady-state electrophoretic migration test (NSSM); round-robin test
In designing a concrete structure under a severe chloride environment by applying a new material and mixture proportion without enough previous data, it is required to determine the chloride-ion diffusion coefficient of concrete to predict the chloride-ion concentration at the reinforcing bar position during its service life. The diffusion coefficient can be evaluated by test methods such as the immersion test or electrophoretic migration test. The electrophoretic migration test, such as NT BUILD 492, is helpful from the point of view of reducing the test period and cost. This research focused on the non-steady-state electrophoretic migration test (NSSM), which improves some problems of NT BUILD 492 proposed by the Public Works Research Institute in Japan, and conducted a round-robin test to verify the reliability of the NSSM. The test results confirmed the reliability of the NSSM and some minor issues to standardize the NSSM.