红黏土不良物理性质与良好的力学特性之间的矛盾所带来的工程问题正引起学术界与工程界广泛的关注。采用离子土固化剂（ ISS ）加固武汉市汉阳区的红黏土，能够有效地改变其物理性质与力学性质。为了研究经过离子土固化剂处理前后的红黏土物相组成及黏土矿物晶面间距的变化，采用西门子 D5000 X 射线衍射仪，对红黏土在 Mg2+ 饱和、 K+ 饱和、甘油饱和及在 550 ℃ 加热条件下进行了 X 射线衍射实验。结果表明，经过离子土固化剂处理过的红黏土，其物相没有明显改变，黏土矿物晶面间距有微小变化。

The engineering problems brought by the contradiction between the bad physical nature and good mechanical properties of red clay are drawing more concern in the academic and the engineering circles. Making use of ionic soil stabilizer(ISS) can effectively change the physical properties and mechanical performances of red clay in Hanyang district of Wuhan City. In order to study the phase composition and the spacing of crystal plane of red clay reinforced by ISS, the X-ray diffraction of red clay was done under the conditions of Mg2+ -saturated, K+ -saturation, glycerol-saturation and heating to 550 ℃ by the Siemens D5000 X-ray diffractometer. The results showed that the phase composition of red clay reinforced by ISS has not significant variation, and the spacing of crystal plane has a small change.