Abstract: The water conservancy projects under continuous drought environment are greatly influenced by shrinkage deformation and crack resistance of hydraulic concrete. The environment temperature and relative humidity are used to simulate the high temperature drought environment. The typical complex stress structure and thin wall structure of concrete were chosen to conduct test under different temperature and relative humidity. The changing laws of drying shrinkage characteristics, mechanical strength properties, anti-cracking characteristics of the aqueduct and panel concrete under different temperature and humidity conditions were revealed. And the shrinkage performance of established hydraulic structure concrete under continuous high temperature drought environment was also discussed.

Key words: continuous high temperature drought, hydraulic concrete, hydraulic structures, shrinkage performance, crack