泥页岩水化膨胀测定新方法

Study on the new testing method of shale swelling

介绍了使用WLZ-1膨胀仪测定泥页岩水化膨胀的新方法,通过测定同种相同质量具有不同初始体积样品的膨胀终了体积,建立了膨胀终了体积与初始体积间的函数关系式,借助于该函数关系式,可排除样品中孔隙体积的干扰,计算出无孔隙样品膨胀终了体积。利用该方法能够测定由于泥页岩中粘土矿物层间水化膨胀造成的泥页岩体积的总膨胀量,更真实地反映泥页岩水化膨胀能力。

A new testing method of shale swelling by using WLZ-1 shale swelling tester is introduced. The expansivity determined by this method can reflect the apparent expansivity as well as that of the clay mineral layer hydration. 'WLZ-1 shale swelling tester possesses the advantage of low system error, low cost and simple operation.