关键词: 道路工程, 水泥稳定碎石, 微裂技术, SPSS, 描述性统计分析, UNIANOVA

Abstract: For the settlement of shrinkage cracks of semi-rigid base，the micro-crack technology of cement-stabilized macadam base in our country has been at the early stage of research and development. Through the study on the relationship between vibration time of the compaction tester and reducing percentage of unconfined compressive strength，the relationship between the degree of micro-crack and vibration time was determined; the micro-crack width value on the specimen surface after micro-crack was observed and read by the crack width detector; the processing and statistical analysis on the filed measurement data of micro-crack width was carried out with the help of SPSS. The results show that：through descriptive statistical analysis，the range of micro-crack width value at various degrees of micro-crack is determined，which provides the theoretical reference for the quantitative relationship for the micro-crack technology of cement-stabilized macadam base. At the same time，by using univariate analysis of variance (UNIANOVA) to research the impact significance which the micro-crack degree and the type of material structure have on the micro-crack width value，it is concluded that the micro-crack degree has a significant effect on micro-crack width value while the type of material structure has no significant effect on that.

Key words: highway engineering, cement-stabilized macadam, micro-crack technique, SPSS, descriptive statistical analysis, UNIANOVA