| 水泥固化/稳定锌污染土的强度和变形特性试验研究 |
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| 引用本文： | 魏明俐,杜延军,张帆.水泥固化/稳定锌污染土的强度和变形特性试验研究[J].岩土力学,2011,32(Z2):306-312. |
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| 作者姓名： | 魏明俐 杜延军 张帆 |
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| 作者单位： | 东南大学岩土工程研究所; |
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| 基金项目： | 国家自然科学基金(No.50878052,No.40972173); 教育部新世界优秀人才计划(No.NCET-09-0286); 江苏省科技支撑计划(No.BK2010060) |
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| 摘 要： | 在不同水泥掺量不同和龄期条件下对不同Zn2+浓度的水泥固化/稳定重金属污染土(CHMS)进行了无侧限抗压强度试验。分析了CHMS的应力-应变关系和强度发展随Zn2+浓度的变化特性;采用参数(qu/qu,Zn0)对CHMS的无侧限抗压强度随龄期发展规律进行了评价;讨论了Zn2+浓度对破坏应变和变形模量的影响。结果表明,锌离子浓度对CHMS的无侧限抗压强度、破坏应变和变形模量的影响均存在"临界浓度"(0.05%)。低于"临界浓度"时,锌离子对CHMS的强度和变形发展影响不明显;高于"临界浓度"时,CHMS的强度和变形发展规律受锌离子浓度影响显著。
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| 关 键 词： | 固化/稳定 重金属 无侧限抗压强度 |
| 收稿时间： | 2011-04-15 |
Fundamental properties of strength and deformation of cement solidified/stabilized zinc contaminated soils |
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| WEI Ming-li,DU Yan-jun,ZHANG Fan.Fundamental properties of strength and deformation of cement solidified/stabilized zinc contaminated soils[J].Rock and Soil Mechanics,2011,32(Z2):306-312. |
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| Authors: | WEI Ming-li DU Yan-jun ZHANG Fan |
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| Institution: | Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | To investigate characteristics of strength and deformation of cement solidified/stabilized heavy metal contaminated soils(CHMS),a series of unconfined compression tests were performed.Samples of CHMS were prepared artificially by adding zinc nitrate as a source of pollutant at zinc concentrations of 0.01,0.02,0.05,0.1,and 0.2 mg/kg(dry soil weight basis),and three cement contents of 12%,15%,and 18%(dry soil weight basis).The effect of zinc concentration on stress-strain curves is discussed.A proposed parame... |
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| Keywords: | solidification/ stabilization heavy metal unconfined compressive strength |
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