赤泥改良石灰土的应力-应变-电阻率研究
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摘要
为了探究不同龄期下,赤泥改良石灰土的应力-应变-电阻率曲线的变化,测试了试块的初始电阻率、无侧限抗压强度和破坏电阻率,且在无侧限抗压强度测试过程中全程同步检测试块的电阻率变化,采用所得数据绘制应力-应变-电阻率曲线并进行分析。分析结果表明:试块初始电阻率和无侧限抗压强度均随龄期的增加而增加;同赤泥掺量下的应力-应变-电阻率曲线在不同龄期条件下的变化基本一致;在0%赤泥掺量条件下,电阻率会随应力的增加而减小,在即将达到极限应力时会迅速增加;在30%赤泥掺量条件下,电阻率随应力的增大而持续减小并最终保持稳定;破坏电阻率随龄期的增加呈线性上升的趋势。
In order to investigate the change of stress-strain-resistivity curve of red mud modified lime soil at different ages,the initial resistivity,the unconfined compressive strength and the failure resistivity of the specimen were measured, and the change of the resistivity of the specimen was detected synchronously during the whole process of testing the unconfined compressive strength. And the stressstrain-resistivity curves were drawn and analyzed by using the obtained data. The results show that the initial resistivity and unconfined compressive strength increase with the increase of age. The stress-strainresistivity curves of the same amount of red mud at different ages are basically consistent with each other.Under the condition of 0% red mud content,the resistivity decreases with the increase of stress,and increases rapidly when the limit stress is about to reach. Under the condition of 30% red mud content,the resistivity decreases continuously with the increase of stress and finally remains stable. The failure resistivity increases linearly with the increase of age.
In order to investigate the change of stress-strain-resistivity curve of red mud modified lime soil at different ages,the initial resistivity,the unconfined compressive strength and the failure resistivity of the specimen were measured, and the change of the resistivity of the specimen was detected synchronously during the whole process of testing the unconfined compressive strength. And the stressstrain-resistivity curves were drawn and analyzed by using the obtained data. The results show that the initial resistivity and unconfined compressive strength increase with the increase of age. The stress-strainresistivity curves of the same amount of red mud at different ages are basically consistent with each other.Under the condition of 0% red mud content,the resistivity decreases with the increase of stress,and increases rapidly when the limit stress is about to reach. Under the condition of 30% red mud content,the resistivity decreases continuously with the increase of stress and finally remains stable. The failure resistivity increases linearly with the increase of age.
引文
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[13]董晓强,宋志伟,张少华,等.水泥土搅拌桩芯样电阻率特性的应用研究[J].土木工程学报,2016,49(10):88-94.
[2] Dang M Q,Kim Y S,Tan M D. Soil stabilization by using alkaline-activated ground bottom ash coupled with red mud[M]. Proceedings of the4th Congrès International de Géotechnique-Ouvrages-Structures,2018:800-807.
[3] He J,Zhang G. Geopolymerization of red mud and fly ash for civil infrastructure applications[C]. Geo-Frontiers Congress,2011:1287-1296.
[4]孙兆云.拜耳法赤泥填筑路基的工程技术与环境影响研究[D].济南:山东大学,2017.
[5] Sabat A K,Mohanta S. Strength and durability characteristics of stabilized red mud cushioned expansive soil[J]. International Journal of Applied Engineering Research,2015,10(10):25867-25878.
[6]Celik S. An experimental investigation of utilizing waste red mud in soil grouting[J]. KSCE Journal of Civil Engineering,2016,21(4):1-10.
[7]杨海朋,白冰,聂庆科.赤泥渗沥液对黏性土和固化赤泥影响的试验研究[J].岩土力学,2017,38(S1):299-304.
[8]王晓,张磊,罗忠涛,等.赤泥对道路硅酸盐水泥性能和矿物组成的影响[J].建筑材料学报,2017,20(5):774-779.
[9]吴锋,李辉,杨康.用脱碱赤泥替代生料制备水泥熟料试验研究[J].硅酸盐通报,2016,35(4):1306-1310.
[10]查甫生,刘松玉,杜延军,等.土的颗粒组成对电阻率的影响试验研究[J].工业建筑,2013,43(3):71-74.
[11]李方.石灰土的电阻率计算模型初探[J].西部探矿工程,2010,22(12):20-21+24.
[12]吴道祥,熊福才,郭静芳,等.不同含水率膨胀土的无侧限抗压强度-电阻率试验研究[J].合肥工业大学学报(自然科学版),2016,39(12):1688-1692.
[13]董晓强,宋志伟,张少华,等.水泥土搅拌桩芯样电阻率特性的应用研究[J].土木工程学报,2016,49(10):88-94.
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