磷石膏综合稳定土力学性能及合理掺量研究  

Study on mechanical properties and rational addition of phosphogypsum comprehensive stabilized soil

作　　者：彭波[1] 尚文勇 赵宏伟 宋云峰 张心纯 邓海龙 杨征文 PENG Bo;SHANG Wenyong;ZHAO Hongwei;SONG Yunfeng;ZHANG Xinchun;DENG Hailong;YANG Zhengwen(Chang'an University,College of Highways,Xi'an 710064,China;Yan'an Highway Administration,Yan'an 716000,China;Weinan Traffic Engineering Quality Supervision Station,Weinan 714100,China;China Railway Construction Shaanxi Expressway Co.Ltd.,Xi'an 710018,China;Shaanxi Provincial Transportation Planning and Design Institute,Xi'an 710065,China)

机构地区：[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 [5]陕西省交通规划设计研究院,陕西西安710065

出　　处：《新型建筑材料》2020年第8期86-90,127,共6页New Building Materials

基　　金：陕西省自然科学基金项目(2019JM-064);陕西省交通运输厅科技计划项目(18-04K)。

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。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.

关 键 词：路基工程 磷石膏 力学性能 稳定土 合理掺量 

分 类 号：TU472[建筑科学—结构工程]