Abstract:

In this paper,first,an equilibration time ratio model of water influence depth in concrete is established,and the equilibration time ratio in simulated environment,which is influenced by three parameters,namely,thewater- to- cement ratio,the initial concrete saturation,and the environment saturation around concrete surface,is in-vestigated.Then,the relationships between the three parameters and the water influence depth in concrete are ana-lyzed via numerical calculation,and a model describing the water influence depth is constructed. Finally,thedifferences and similarities of the solving methods for equilibration time ratio are discussed.The results show that(1) different solving methods help to obtain the same equilibrium time ratio that basically accords with the test re-sults; (2) there exists an obvious exponential relationship between the equilibration time ratio and such parametersas the water- to- cement ratio,the initial concrete saturation and the environment saturation around concrete surface;and (3) the water influence depth in concrete is linear to the square root of wetting time.

Key words: simulated drying- wetting environment, concrete, water influence depth, equilibration time ratio