文章从由碳酸盐岩溶余堆积形成的红粘土引起产生的地裂、房裂等不良工程地质现象入手 ,以大量的实验资料为基础 ,指出广西红粘土的胶粒含量 ,可塑性指标高 ,具有较强的吸附能力和较强的亲水性 ,自由膨胀率接近或等于 2 7%。论述了红粘土液限和塑限值在塑性图上的分布规律与一般膨胀土的分布规律相吻合 ,这种粘土应属于弱至中等级膨胀性粘土 ,并以收缩变形为其主要特征。 Based on a large number of experimental data, the article points out that the content of colloidal particles in Guangxi red clay is high, the plasticity index is high, and the content of Strong adsorption capacity and strong hydrophilic, free expansion rate close to or equal to 27%. The distribution law of liquid clay and plastic limit of plastic clay in red clay is in accordance with the distribution law of common expansive clay, which belongs to weak to medium expansive clay and takes shrinkage deformation as its main feature.