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2. Standard test method for electrical indication of concrete's ability to resist chloride ion penetration. ASTM C 1202-91. American Society for Testing and Materials, 1992.
3. Standard method of test for rapid determination of the chloride permeability of concrete. AASHTO T 277-83. Washington DC: American Association of State Highway and Transportation Officials, 1983.
4. The A.C. response of hardened cement paste;McCarter;Cem Concr Res,1990