现代交通技术2026，Vol.23Issue(1)：12-17,6.
半刚性基层二次再生混合料配合比设计与路用性能提升研究
Research on Mix Design and Road Performance Improvement of Semi-rigid Base Secondary Recycled Mixture
贺健 1卢勇1
作者信息
- 1. 苏交科集团股份有限公司,南京 210019
- 折叠
摘要
Abstract
An external admixture method was adopted to add a reinforcing agent accounting for 3％o of the cement mass into the semi-rigid base secondary recycled mixture.Taking the 7-day unconfined compressive strength and splitting strength as evalua-tion indicators,the effects of different dosages and mixing methods of secondary recycled milled materials on the road performance of cement-stabilized secondary recycled mixtures were studied.Through 30-day dry shrinkage tests of cement-stabilized secondary recycled mixtures with different milled material dosages,the influence of milled material dosage on the dry shrinkage performance was investigated.At the same time,by adding different proportions of expansive agent into the mixtures,the effects of expansive agent dosages on the early-stage dry shrinkage performance of cement-stabilized secondary recycled mixtures were studied.The re-search results indicate that with the increase of the dosage of secondary recycled milled materials,the 7-day unconfined compres-sive strength of the recycled mixture decreases,while the splitting strength increases to a certain extent and the drying shrinkage coefficient rises.The graded mixing method can effectively improve the mechanical strength of recycled cement stabilized macadam,and adding expansive agent with a dosage of about 5％of the cement mass has a significant improvement effect on the dry shrinkage performance of the cement-stabilized secondary recycled mixture.关键词
增强剂/半刚性基层/二次再生/配合比设计/路用性能Key words
reinforcing agent/semi-rigid base/secondary recycled/mix design/road performance分类
交通工程引用本文复制引用
贺健,卢勇..半刚性基层二次再生混合料配合比设计与路用性能提升研究[J].现代交通技术,2026,23(1):12-17,6.
