不同含水率岩石试样制备方法探讨

Discussion on Preparing Methods of Rock Samples with Different Water Contents

饱水岩石试样的制备方法主要有自然浸水法、煮沸法和真空饱和法,而不同含水率岩石试样的制备一般采用自然浸水法,但该方法制备时间长、效率低。本文采用真空抽气法,通过控制抽气压力和时间实现不同含水率岩样的快速制备,与自然浸水法相比,两种方法制备的岩样含水率均与时间呈对数关系,但真空抽气法制备含水岩样的时间更短,且获得岩样的含水率值也更稳定。

The preparation methods for water-saturated rock samples includes natural soaking method, boiling method and vacuum saturation method, among which, the natural soaking method is widely used for preparing the rock samples with different water contents. In view of the longer preparing time and lower efficiency of this method, this article explores the use of vacuum pumping method which can realize fast preparation of rock samples with different water contents through vacuum pumping pressure and time controlling. In comparison, there is a logarithmic relationship between time and water contents of rock samples prepared by both methods while the vacuum pumping method requires shorter time and obtains more stable water contents.