关键词: 混凝土, 压汞试验, 长龄期抗压强度, 孔结构

Abstract: In order to study the macroscopical performance evolution of dam concrete, the pore structure feature of different parts in the core samples were analyzed by field sampling from two concrete dams. By compression and pressure mercury test, the comparison between theoretical results of compressive strength and test data of core samples had been carried out. This research shows that there is an obvious spatial correlation in the performance evolution of dam concrete and a certain correspondence between the pore structure and strength of dam concrete at a certain age. It is feasible to use the pore structure of concrete to characterize the long age compressive strength of dam concrete. The research in this paper can provide a basis for further study on the performance evolution of dam concrete.

Key words: concrete, mercury intrusion porosimetry, long-age compressive strength, pore structure