6LITVAN G G. Frost action in cement in the presence of de-ic er[J]. Cement and Concrete Research, 1976,6(3):351 356.
7I.INDVALL A. Mapping of the chloride load around two Swed ish reinforced concrete bridges[R]. Gothenburg: Chalmers Uni versity of Technology, 2002 : 2-15.
8NII.SSON I. O,ANDERSEN A,LUPING T,et al. Chloride in gress data from field exposure in a Swedish road environment [C]//2nd International RII.EM Workshop on Testing and Modelling the Chloride Ingress into Concrete. France: RILEM Publications, 2001 : 69-84.
91.INDVALL A, ANDERSEN A, NILSSON I. O. Chloride in gress data from Danish and Swedish road bridges exposed to splash from de icing salt[C]//2nd International Workshop on Testing and Modelling the Chloride Ingress into Concrete. Par- is:Is, n. ],2000:85-103.
10MOHAMMED T U, HAMADA H. Relationship between free chloride and total chloride contents in concrete[J]. Cement and Concrete Research,2003,33(9) :1487-1490.
