Aiming at the low servicelife and bad durability of the traditional concrete structure and concrete cover

the highdense concrete cover (HDC) was produced with the optimization of interfacial transition zone in meso scale(50100μm) between cement mortar and aggregate of the ordinary concrete. Moreover

some properties of HDC were studied

including the impermeability

the anticorrosion behavior

antiacidic gas corrosion and freeze resistance. It was shown that the impermeability of HDC was excellent with very low permeability. Compared with ordinary concrete

the anticorrosion behavior of HDC was remarkably strengthened. And under the condition of erosion accelerated by CO2 and SO2

the freeze resistance such as the appearance after freezing and thawing

mass loss and relative dynamic modulus of HDC was better than that of ordinary concrete and neutralization depth of 90day was less than 1 mm. On the other hand

the results of Scanning Electron Microscope (SEM) experiment indicated that the size of interfacial transition zone of HDC was effectively reduced and the microstructure compactness of concrete was increased. Therefore

it was found that the special producing technology and characteristics of HDC can improve the durability

and then the servicelife of structure was increased effectively.