一、对现有判别和评价胀缩性土指标的讨论现有的判别指标,如按其所反映的胀缩性影响因素来分类,可分为反映土的成分和结构影响的(如膨胀率、体缩率、线缩率、胀缩总量等)和只能反映土的成分影响的(如自由膨胀量、塑性指数、液限、活动指数、压实指标等)两大类。 I. Discussion of Existing Discrimination and Evaluation of Shrinkage Soil Indicators Existing discriminant indicators, such as the classification of the factors affecting inflation and shrinkage, can be classified as reflecting the composition and structure of the soil (such as the expansion rate). , shrinkage, shrinkage, total shrinkage, etc.) and can only reflect the impact of the composition of the soil (such as the amount of free expansion, plasticity index, liquid limit, activity index, compaction index, etc.) two broad categories.