5Li Zongjin, Li Wenlai. Contaetless, transformer-based meas- urement of the resistivity of materials: US, 6639401 [P]. 2003-10-28.
6Ho D W S, Lewis R L. The carbonation of concrete and its prediction [J]. Cement Concr Res, 1987,17 : 489.
7Dhir R K, Hewlett P C, Chan Y N. Near surface characte- ristics of concrete: Prediction of carbonation resistance [J]. Magazine Concr Res, 1989,41 : 137.
8Papadakis V G, Vayenas C G, Fardis M N. Fundamental modeling and experimental investigation of concrete carbona tion[J]. ACI Mater J, 1991,88: 363.
