Evaluation indexes were classified.Results show good correlativity exist expansion ratio, recovery ratio, CEC and electric potential, while CST and colloidity with bad correlativity with other idexes.

• 利用变量聚类法对评价指标进行了分类,聚类结果证明,膨胀率、分散率、CEC及电动电位间具有较好的相关性,CST和胶体率与其他评价指标的相关性较差。