- 目录
- 建筑石膏与胶凝材料
- 首页
磷石膏综合稳定土力学性能及合理掺量研究
作者:彭波1,尚文勇1,2,赵宏伟3,宋云峰3,张心纯4,邓海龙1,杨征文5
(1.长安大学 公路学院,陕西 西安 710064;2.延安公路管理局,陕西 延安 716000;
3.渭南市交通工程质量监督站,陕西 渭南 714100;
4.中铁建陕西高速有限公司,陕西 西安 710018;
4.中铁建陕西高速有限公司,陕西 西安 710018;
5.陕西省交通规划设计研究院,陕西 西安 710065)
摘要:采用磷石膏与石灰、水泥综合稳定路基土,分别对石灰磷石膏稳定土与水泥磷石膏稳定土进行CBR试验、抗压回弹模量试验和7 d无侧限抗压强度试验,确定了磷石膏综合稳定路基土的推荐配合比。结果表明:石灰磷石膏稳定土和水泥磷石膏稳定土的CBR、抗压回弹模量和无侧限抗压强度均随着磷石膏掺量的增加而提高;石灰磷石膏稳定土中石灰掺量为5%~7%,且当石灰与磷石膏的质量比为1∶1.5时,水泥磷石膏稳定土中水泥掺量为4%~6%,且当水泥与磷石膏的质量比为1∶2时,混合料的力学性能和经济性最佳。
关键词:路基工程;磷石膏;力学性能;稳定土;合理掺量
中图分类号:TU472 文献标识码:A 文章编号:1001-702X(2020)08-0086-05
Study on mechanical properties and rational addition of phosphogypsum comprehensive stabilized soil
PENG Bo1,SHANG Wenyong1,2,ZHAO Hongwei3,SONG Yunfeng3,ZHANG Xinchun4,DENG Hailong1,YANG Zhengwen5
(1.Chang'an University,College of Highways,Xi'an 710064,China;
2.Yan'an Highway Administration,Yan'an 716000,China;
2.Yan'an Highway Administration,Yan'an 716000,China;
3.Weinan Traffic Engineering Quality Supervision Station,Weinan 714100,China;
4.China Railway Construction Shaanxi Expressway Co. Ltd.,Xi'an 710018,China;
5.Shaanxi Provincial Transportation Planning and Design Institute,Xi'an 710065,China)
4.China Railway Construction Shaanxi Expressway Co. Ltd.,Xi'an 710018,China;
5.Shaanxi Provincial Transportation Planning and Design Institute,Xi'an 710065,China)
Abstract:Using phosphogypsum,lime,and cement to stabilize the roadbed soil,the lime-phosphorus stabilized soil and cement phosphogypsum stabilized soil were respectively subjected to CBR test,compressive elastic modulus test,and 7 d unconfined compressive strength test to determine the recommended mix ratio of phosphogypsum comprehensive stabilized roadbed soil. The results show that the CBR,compressive elastic modulus and unconfined compressive strength of lime-phosphorus stabilized soil and cement-phosphorus stabilized soil increase with the increase of the dosage of phosphogypsum;the lime dosage in lime-phosphorus stabilized soil is 5%~7%,and when the proportion of lime-phosphorus gypsum is 1∶1.5,the cement dosage in cement-phosphorus stabilized soil is 4%~6%,and when the ratio of cement phosphogypsum is 1∶2,the mechanics of mixture performance and economy are the best.
Key words:subgrade engineering,phosphogypsum,mechanical properties,stabilized soil,reasonable dosage