李智, 刘勇, 刘健.水泥稳定碎石细观骨架结构特征研究[J].河南理工大学学报（自然科学版）,2023,42(2):175-181.

LI Z, LIU Y, LIU J.Research on characteristics of meso-skeleton structure of cement-stabilized rock material[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(2):175-181.

水泥稳定碎石细观骨架结构特征研究

李智1, 刘勇1, 刘健2

1.华南理工大学 土木与交通学院，广东 广州  510641；2.弗吉尼亚理工大学 土木工程与环境工程系，弗吉尼亚 黑堡  VA24061

摘要:为了探究不同因素对水泥稳定碎石细观骨架结构的影响，应用CT扫描和数字图像处理技术，从细观角度提出新的水泥稳定碎石骨架结构评价指标，并进行有效性验证，利用该指标对不同成型方式下的混合料骨架结构进行评价。结果表明：该指标评价结果与工程实际和以往研究相符合，旋转压实成型方式在达到一定压实次数后骨架指标趋于稳定，振动成型达到一定的振动时长后获得较好的骨架结构，继续振动反而会导致集料竖向离析。旋转压实能获得较好的横断面骨架指标，振动成型获得的纵断面指标更优。用该指标评价不同成型方式的骨架特征具有一定指导意义。

关键词:水泥稳定碎石;数字图像处理;骨架结构;成型方式

doi:10.16186/j.cnki.1673-9787.2021010132

基金项目:国家自然科学基金资助项目（52378223）

收稿日期:2021/01/29

修回日期:2021/05/12

出版日期:2023/03/25

Research on characteristics of meso-skeleton structure of cement-stabilized rock material

LI Zhi1, LIU Yong1, LIU Jian2

1.School of Civil Engineering and Transportation，South China University of Technology，Guangzhou  510641，Guangdong，China；2.Department of Civil and Environmental Engineering，Virginia Polytechnic Institute and State University，Blacksburg  24061，Virginia，USA

Abstract:In order to evaluate the influences of different factors on the meso-skeleton structure of cement-stabilized rock material（CCRM），a new evaluation index for the skeleton structure of CCRM was proposed from a meso-level perspective and its validity was verified.The results showed that the evaluation results of this index were consistent with engineering practice and previous research.The skeleton index tended to be stable after the rotary compaction molding method reached a certain number of compactions，and a better skeleton structure was obtained after the vibration molding reached a certain vibration time.Continued vibration would cause the aggregate to segregate vertically.Rotary compaction could obtain better cross-sectional skeleton indicators，and vibration molding could obtain better longitudinal cross-sectional indicators.Using this index to evaluate the skeleton characteristics of different molding methods had certain guiding significance.

Key words:cement-stabilized rock material;digital image processing;skeleton structure;molding method

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