摘要
为了探究重金属铅对水泥土强度的影响,通过电阻率和无侧限抗压强度试验,研究了铅离子对水泥土强度和电阻率特性的影响规律,并且对其化学微观机理进行了简要分析。结果表明:在各个龄期下,水泥土的强度和电阻率都随着铅离子含量的增加先降低后升高再降低,无侧限抗压强度和电阻率都出现了峰值和谷值;在不同铅离子含量下,水泥土的强度和电阻率都随着龄期的增加而增长;电流频率对含铅水泥土的电阻率有着明显的影响规律,可将50 k Hz至1 MHz范围内的电流频率作为适宜测量频率;强度随着电阻率的增加大体呈对数增长关系。
In order to explore the effects of lead ions on the strength of cemented soil, experiments onelectrical resistivity and unconfined compressive strength were conducted,and the chemical mech-anism was analyzed briefly. The results show that the strength and electrical resistivity of cemented soil decreasesat first, then increases, anddecreasesagain finallywith the increase of lead ions at dif-ferent age. The strength and electrical resistivity of cemented soil increase with the age fordifferent lead ion content. The electrical resistivity is influenced significantly by the current frequency, and the current frequency that rangesfrom 50 kHz to 1 MHz isrecommended. The strength logarithmically increaseswith the increaseof resistivity.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2015年第4期956-962,共7页
Journal of Guangxi University（Natural Science Edition）
基金
新世纪优秀人才支持计划资助项目(NCET-12-1039)
山西省回国留学人员科研资助项目(2013-043)
山西省留学回国人员科技活动择优资助项目
山西省科技创新重点团队建设计划项目(2014131019)
关键词
重金属铅
水泥土
电阻率
无侧限抗压强度
heavy metal lead
cemented soil
electrical resistivity
unconfined compressive strength
