摘要
为研究复合镍铁渣粉的掺入对水泥土动态力学性能的影响,在不同土质、复合镍铁渣粉掺量、养护龄期的基础上,开展了分离式霍普金森压杆(Split Hopkinson Pressure Bar,SHPB)试验研究。结果表明:适量的复合镍铁渣粉掺入水泥土后,能够增加水泥土的动态强度,且其发挥最佳效果的掺入值在40%左右;复合镍铁渣粉的掺入没有提升水泥土的延性,水泥土破坏过程可分为近似弹性阶段、脆性变形阶段和脆性破坏阶段;随着养护时间的增长,不同掺量、不同土质的复合镍铁渣粉水泥土的动态应力和动应力峰值都实现增长。
To study the influences of composite ferronickel slag powder on the dynamic mechanical properties of cement soil,the Split Hopkinson Pressure Bar(SHPB)test was carried out under different soil quality,composite ferronickel slag powder content,and curing age.The results showed that adding the proper amount of composite ferronickel slag powder could improve the dynamic strength of cement soil,with an optimum adding content of 40%.The composite ferronickel slag powder did not improve the ductility of cement soil,and the failure process of cement soil could be divided into approximate elastic stage,brittle deformation stage,and brittle failure stage.As the curing time increased,the dynamic stress and dynamic stress peak of composite ferronickel slag powder cement soil with different content and soil quality were increased.
作者
何森凯
张必胜
陈峰
HE Senkai;ZHANG Bisheng;CHEN Feng(Offshore Highway Construction and Maintenance of New Material Technology Application Transportation Industry Research and Development Center of Fujian Transportation Planning&Design Institute Co.,Ltd.,Fuzhou,Fujian 350004,China;Engineering School of Fujian Jiangxia University,Fuzhou,Fujian 350108,China)
出处
《山西交通科技》
2024年第2期35-39,共5页
Shanxi Science & Technology of Transportation
基金
福建省自然科学基金项目(2022J01963)
福建省高校产学研联合创新项目(2022Y4002)
近海公路建设与养护新材料技术应用交通运输行业研发中心开放基金课题(JXH2022013)
关键词
复合镍铁渣粉
水泥土
SHPB试验
动态强度
composite ferronickel slag powder
cement soil
SHPB test
dynamic strength
作者简介
何森凯(1990—),男,福建龙岩人,工程师,主要从事岩土工程、地基基础检测研究工作。
