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不同含水率条件下拜耳法赤泥强度及水力学特性

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刘东燕, 冯燕博, 赵宝云, 杨阳, 刘鹏. 不同含水率条件下拜耳法赤泥强度及水力学特性[J]. 环境工程学报, 2016, 10(5): 2601-2608. doi: 10.12030/j.cjee.201412081
引用本文: 刘东燕, 冯燕博, 赵宝云, 杨阳, 刘鹏. 不同含水率条件下拜耳法赤泥强度及水力学特性[J]. 环境工程学报, 2016, 10(5): 2601-2608. doi: 10.12030/j.cjee.201412081
shu
Liu Dongyan, Feng Yanbo, Zhao Baoyun, Yang Yang, Liu Peng. Strength and hydraulic characteristics of Bayer red mud under various water contents[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2601-2608. doi: 10.12030/j.cjee.201412081
Citation: Liu Dongyan, Feng Yanbo, Zhao Baoyun, Yang Yang, Liu Peng. Strength and hydraulic characteristics of Bayer red mud under various water contents[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2601-2608. doi: 10.12030/j.cjee.201412081
shu

不同含水率条件下拜耳法赤泥强度及水力学特性

  • 1.

    重庆大学土木工程学院, 重庆 400045

  • 2.

    重庆科技学院建筑工程学院, 重庆 401331

  • 基金项目:

    国家自然科学基金资助项目(41302223)

    贵州省教育厅自然科学研究项目(黔教科[2011]007号)

    重庆市基础与前沿研究计划项目(cstc2013jcyjA90004)

  • 中图分类号: X705

Strength and hydraulic characteristics of Bayer red mud under various water contents

  • 1.

    College of Civil Engineering, Chongqing University, Chongqing 400045, China

  • 2.

    School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China

  • Fund Project:

摘要

  • 摘要: 在利用XRD、XRF、SEM等微观测试手段分析了拜耳法赤泥的化学成分、矿物组成和微观结构的基础上,通过无侧限抗压强度实验、固结排水三轴剪切实验研究了拜耳法赤泥在不同水力路径条件下其强度特性的变化规律;同时通过非饱和土瞬态水力特性循环实验系统对拜耳法赤泥的水力学特性进行了研究。研究表明:含水率的变化对拜耳法赤泥的强度特性有较大程度的影响,在脱水干燥过程中,其抗压强度和抗剪强度指标均有较大程度的增长;拜耳法赤泥具有遇水崩解现象,已干燥硬化的赤泥会遇水崩解,强度指标明显降低,且在较低应变处即发生脆性破坏;拜耳法赤泥的土-水特征曲线和渗透系数特征曲线均展现出明显的滞后效应,说明拜耳法赤泥对水有较大的敏感性,在降雨条件影响下,拜耳法赤泥堆体的稳定性有一定程度的降低。
    Abstract: The chemical components, mineral composition, and microstructure of Bayer red mud were analyzed by micro-measurements, such as X-ray diffraction (XRD), X-ray fluorescence (XRF), and a scanning electron microscope (SEM). On this basis, the mechanical properties of Bayer red mud with various hydraulic histories were studied with an unconfined compression strength test and a triaxial consolidated drained shear test. Meanwhile, the hydraulic characteristics were also studied by a transient hydraulic characteristic cyclic test of unsaturated mud. The test indicated that the changes in water content had significant effects on the strength characteristics of Bayer red mud. Its compressive strength and shear strength both largely increased during the dehydration process. The strength of Bayer red mud clearly decreased and brittle failure occurred with low strain in water. For example, the dried and hardened red mud disintegrated in water. The soil-water characteristic curve (SWCC) and HCFC of the Bayer red mud demonstrated that the Bayer red mud is sensitive to water because there is a clear hysteresis effect. Thus, the stability of the Bayer red mud stack is reduced at a certain degree by rainfall.
  • [1] 田跃, 王福兴, 马尚成. 赤泥堆存的力学特性. 轻金属, 1998(2): 32-34 Tian Yue, Wang Fuxing, Ma Shangcheng. The mechanical properties of red mud stockpiling. Light Metals, 1998(2): 32-34(in Chinese)
    [2] 郑水林, 袁继祖. 非金属矿加工技术与应用手册. 北京: 冶金工业出版社, 2005
    [3] Liu Yong, Lin Chuxia, Wu Yonggui. Characterization of red mud derived from a combined Bayer process and bauxite calcination method. Journal of Hazardous Materials, 2007, 146(1-2): 255-261
    [4] Kumar V., Nautiyal B. D., Jha A. K. Use of neutralized red mud in concrete. Indian Concrete Journal, 1989, 63(10): 505-507
    [5] 刘东燕, 冯燕博, 冯振洋, 等. 烧结法赤泥的强度演化规律. 环境工程学报, 2014, 8(4): 1653-1656 Liu Dongyan, Feng Yanbo, Feng Zhenyang, et al. Research on strength evolution law of red mud from sintering process. Chinese Journal of Environmental Engineering, 2014, 8(4): 1653-1656(in Chinese)
    [6] 郭晖, 邹波蓉, 管学茂, 等. 拜耳法赤泥的特性及综合利用现状. 砖瓦, 2011(3): 50-53 Guo Hui, Zou Borong, Guan Xuemao, et al. Characteristics and comprehensive utilization status of red mud of Bayer process. Block-Brick-Tile, 2011(3): 50-53(in Chinese)
    [7] 马光锁. 山西分公司拜耳法赤泥工程特性及堆存方式的探讨. 轻金属, 2005(7): 16-20 Ma Guangsuo. Study on characteristics and stacking method of red mud project for the bayer process in Shanxi branch of chalco. Light Metals, 2005(7): 16-20(in Chinese)
    [8] 田跃. 赤泥堆场干法改造. 环境工程, 2008, 26(4): 40-42 Tian Yue. Dry process modification stock dump of red mud. Environmental Engineering, 2008, 26(4): 40-42(in Chinese)
    [9] Li Yanzhong, Liu Changjun, Luan Zhaokun, et al. Phosphate removal from aqueous solutions using raw and activated red mud and fly ash. Journal of Hazardous Materials, 2006, 137(1): 374-383
    [10] Jobbágy V., Somlai J., Kovács J., et al. Dependence of radon emanation of red mud bauxite processing wastes on heat treatment. Journal of Hazardous Materials, 2009, 172(2-3): 1258-1263
    [11] Huang Weiwei, Wang Shaobin, Zhu Zhonghua, et al. Phosphate removal from wastewater using red mud. Journal of Hazardous Materials, 2008, 158(1): 35-42
    [12] 刘万超, 张校申, 江文琛, 等. 拜耳法赤泥粒径分级预处理的研究. 环境工程学报, 2011, 5(4): 921-924 Liu Wanchao, Zhang Xiaoshen, Jiang Wenchen, et al. Study on particle-size separation pretreatment of Bayer red mud. Chinese Journal of Environmental Engineering, 2011, 5(4): 921-924(in Chinese)
    [13] 吴宏, 刘银宝. 土的分类中塑性指数与黏粒含量的关系. 中国市政工程, 2008(1): 62-63 Wu Hong, Liu Yingbao. The relation between plasticity index and content of clay particles in soil classification. China Municipal Engineering, 2008(1): 62-63(in Chinese)
    [14] 刘东燕, 侯龙, 王平. 常见赤泥的物化特性及综合利用研究. 材料导报, 2012, 26(专辑20): 310-312 Liu Dongyan, Hou Long, Wang Ping. Study on physicochemical features and the corresponding method for comprehensive utilization of common red muds. Materials Review, 2012, 26(Album 20): 310-312(in Chinese)
    [15] Wang Ping, Liu Dongyan. Physical and chemical properties of sintering red mud and Bayer red mud and the Implications for beneficial utilization. Materials, 2012, 5(10): 1800-1810
    [16] Lu N., Wayllace A., Carrera J., et al. Constant flow method for concurrently measuring soil-water characteristic curve and hydraulic conductivity function. Geotechnical Testing Journal, 2006, 29(3): 256-266
    [17] Lu Ning, Lechman J., Miller K. T. Experimental verification of capillary force and water retention between uneven-sized spheres. Journal of Engineering Mechanics, 2008, 134(5): 385-395
    [18] Nam S., Gutierrez M., Diplas P., et al. Comparison of testing techniques and models for establishing the SWCC of riverbank soils. Engineering Geology, 2010, 110(1-2): 1-10
    [19] Lu Ning, Godt J. Infinite slope stability under steady unsaturated seepage conditions. Water Resources Research, 2008, 44(11): W11404, doi: 10.1029/2008/WR 006976
    [20] Likos W. J., Lu N. Automated humidity system for measuring total suction characteristics of clay. Geotechnical Testing Journal, 2003, 26(2): 179-190
    [21] 陈存礼, 胡再强, 谢定义. 赤泥的变形-强度特性与结构性关系的研究. 岩土力学, 2004, 25(12): 1862-1866 Chen Cunli, Hu Zaiqiang, Xie Dingyi. Research on the relationship between deformation-strength property and structure of red mud. Rock and Soil Mechanics, 2004, 25(12): 1862-1866(in Chinese)
    [22] 谢定义, 姚仰平, 党发宁. 高等土力学. 北京: 高等教育出版社, 2008
    [23] Van Genuchten M. T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Science Society of America Journal, 1980, 44(5): 892-898
    [24] Mualem Y. Hysteretical models for prediction of the hydraulic conductivity of unsaturated porous media. Water Resources Research, 1976, 12(6): 1248-1254
    [25] Wayllace A., Lu Ning. A transient water release and imbibitions method for rapidly measuring wetting and drying soil water retention and hydraulic conductivity functions. Geotechnical Testing Journal, 2012, 35(1): 1-15
    [26] 候龙. 非饱和土孔隙水作用机理及其在边坡稳定分析中的应用研究. 重庆: 重庆大学博士学位论文, 2012 Hou Long. Research on the mechanism of pore water action within unsaturated soil and the corresponding slope stability. Chongqing: Doctor Dissertation of Chongqing University, 2012(in Chinese)
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  • 收稿日期:  2015-01-09
  • 刊出日期:  2016-06-03
刘东燕, 冯燕博, 赵宝云, 杨阳, 刘鹏. 不同含水率条件下拜耳法赤泥强度及水力学特性[J]. 环境工程学报, 2016, 10(5): 2601-2608. doi: 10.12030/j.cjee.201412081
引用本文: 刘东燕, 冯燕博, 赵宝云, 杨阳, 刘鹏. 不同含水率条件下拜耳法赤泥强度及水力学特性[J]. 环境工程学报, 2016, 10(5): 2601-2608. doi: 10.12030/j.cjee.201412081
shu
Liu Dongyan, Feng Yanbo, Zhao Baoyun, Yang Yang, Liu Peng. Strength and hydraulic characteristics of Bayer red mud under various water contents[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2601-2608. doi: 10.12030/j.cjee.201412081
Citation: Liu Dongyan, Feng Yanbo, Zhao Baoyun, Yang Yang, Liu Peng. Strength and hydraulic characteristics of Bayer red mud under various water contents[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2601-2608. doi: 10.12030/j.cjee.201412081
shu

不同含水率条件下拜耳法赤泥强度及水力学特性

  • 1.  重庆大学土木工程学院, 重庆 400045
  • 2.  重庆科技学院建筑工程学院, 重庆 401331
  • 收稿日期:  2015-01-09
基金项目:

国家自然科学基金资助项目(41302223)

贵州省教育厅自然科学研究项目(黔教科[2011]007号)

重庆市基础与前沿研究计划项目(cstc2013jcyjA90004)

摘要: 在利用XRD、XRF、SEM等微观测试手段分析了拜耳法赤泥的化学成分、矿物组成和微观结构的基础上,通过无侧限抗压强度实验、固结排水三轴剪切实验研究了拜耳法赤泥在不同水力路径条件下其强度特性的变化规律;同时通过非饱和土瞬态水力特性循环实验系统对拜耳法赤泥的水力学特性进行了研究。研究表明:含水率的变化对拜耳法赤泥的强度特性有较大程度的影响,在脱水干燥过程中,其抗压强度和抗剪强度指标均有较大程度的增长;拜耳法赤泥具有遇水崩解现象,已干燥硬化的赤泥会遇水崩解,强度指标明显降低,且在较低应变处即发生脆性破坏;拜耳法赤泥的土-水特征曲线和渗透系数特征曲线均展现出明显的滞后效应,说明拜耳法赤泥对水有较大的敏感性,在降雨条件影响下,拜耳法赤泥堆体的稳定性有一定程度的降低。

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