黏性土几种比表面积测试方法的比较

吕海波; 钱立义; 常红帅; 刘丽; 赵艳林

doi:10.11779/CJGE201601013

黏性土几种比表面积测试方法的比较 English Version

吕海波^{1, 2},
钱立义¹,
常红帅¹,
刘丽²,
赵艳林^1,2,

1. 桂林理工大学广西岩土力学与工程重点实验室,广西桂林 541004;
2. 广西大学土木建筑工程学院,广西南宁 530004

基金项目: 国家自然科学基金项目（51169005,41272358）; 广西自然科学基金创新研究团队项目（2012GXNSFGA060001）

详细信息

作者简介:
吕海波(1973- ),男,广西玉林人,博士,教授,博士生导师,主要从事特殊土的工程性质研究。

计量
- 文章访问数: 0466
- HTML全文浏览量: 0
- PDF下载量: 01283
出版历程
- 收稿日期: 2015-01-07
- 发布日期: 2016-01-19

Comparison of several methods for determining specific surface area of clayey soils

1. Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology, Guilin 541004, China;
2. College of Civil Engineering, Guangxi University, Nanning 530004, China

摘要

摘要: 比表面积是黏性土重要的物理化学指标,选择合适的测试方法是正确获得这一参数的前提。采用亚甲基蓝（Methylene Blue）吸附法、乙二醇乙醚（Ethylene Glycol Monoethyl Ether）吸附法、甘油（Glycerin）吸附法以及风干含水率经验公式对5种黏土的比表面积进行试验测定及估算,试验结果表明：对于不含蒙脱石的土样,各种方法测试结果较为一致,偏差较小;但对于含蒙脱石的土样,EGME法的试验结果比其他方法偏小较多。通过X衍射对各种吸附液饱和后的蒙脱石土样进行试验后发现,风干状态下蒙脱石的晶层间距d₀₀₁=15.6 Å,而经EGME法、甘油法、MB法饱和后d₀₀₁分别变为15.9 Å,17.5 Å,19.0 Å,蒙脱石的晶层在甘油及MB饱和后扩展明显,便于吸附分子进入晶层内表面,因此分子覆盖效果更好。统计分析表明,土的比表面积反映了土中各亲水性黏土矿物组分及相对比例的综合影响,因此比表面积与液限、塑性指数及活性等物性指标具有相关性,可用幂函数形式来拟合,而黏粒含量不能反映黏土矿物类型对比表面积的影响,因此当统计试样的黏粒中同时含有膨胀性和非膨胀性矿物时,比表面积与黏粒含量相关性较差。
- 黏性土 /
- 比表面积 /
- 甘油法 /
- 亚甲基蓝法 /
- 乙二醇乙醚法 /
- 风干含水率法 /
- 晶层
Abstract: The specific surface area (SSA) is an important physical and chemical indicator of clayey soils, and choosing the appropriate test method is the premise to obtain the correct parameters. The SSAs of 5 different clayey soils are determined by the following three methods: methylene blue (MB) method, ethylene glycol monoethyl ether (EGME) adsorption method, and glycerin adsorption method, and are estimated by the empirical formula, air-dried moisture content method. The experimental results show that, for the non-swelling clay, the SSA calculated by the above 4 methods are approximately the same, while for the soil samples containing montmorillonite, the SSAs measured by the EGME method are smaller than those by other methods. After montmorillonite soil samples are saturated with different adsorption solutions, the soil samples are analyzed through X-ray diffraction experiments. It is found that the spacing of air-dried montmorillonite crystal layer d₀₀₁=15.6 Å, while that saturated by EGME, glycerol and MB is changed to 15.9 Å, 17.5 Å, 19.0 Å, respectively. The montmorillonite crystal layer saturated in glycerol or MB is obviously expanded, which is facilitative for adsorbed molecules to enter the surface of the crystal layer, and the molecules also cover the layer better. The statistics of the existing research results indicate that the SSA reflects the composite effects of composition of various hydrophilic clay minerals and the relative proportions. Therefore, the SSA is correlated with the liquid limit, plasticity index and activity and other physical indicators, and it is available to fit them in the form of a power function. If the soils contain swelling clay minerals, poor correlation between the SSA and the clay fraction will be found because the effects of type of clay minerals cannot be reflected by the clay fraction.
- clayey soil /
- specific surface area /
- glycerin method /
- MB method /
- EGME method /
- air-dried moisture content method /
- crystal layer

HTML全文

参考文献(22)

[1]	PETERSEN L W, MOLDRUP P, JACOBSEN O H, et al. Relations between specific area and soil physical and chemical properties[J]. Soil Science, 1996, 161(1): 9-21.
[2]	DYAL R S, HENDRICKS S B. Total surface of clays in polar liquids as a characteristic index[J]. Soil Science, 1950, 49: 421-432.
[3]	邓永锋, 谢永贵, 王怡红, 等. 几种黏性土比表面积测试技术及对比[C]// 第十四届中国科协年会第21会场：山区高速公路技术创新论坛论文集. 北京: 中国学术期刊电子杂志出版社, 2012. (DENG Yong-feng, XIE Yong-gui, WANG Yihong, et al. Measurement technology of specific surface area[C]// Proceedings of the 14th Annual Meeting of Chia Association for Science and Technology, 21st parallel sessions: Technology Innovation of Mountain Road Forum. Beijing: China Academic Journal Electronic Publishing House, 2012. (in Chinese))
[4]	CARTER D L, HEILMAN M D, GONZALEZ C L. Ethylene glycol monoethyl ether for determining surface area of silicate minerals[J]. Soil Science, 1965, 100(5): 356-360.
[5]	周芳琴, 罗鸿禧. 乙二醇乙醚法测定土壤的比表面积[J]. 岩土工程学报, 1984, 6(5): 92-95. (ZHOU Fang-qin, LUO Hong-xi. Measurement of soil SSA by glycol ether[J]. Chinese Journal of Geotechnical Engineering, 1984, 6(5): 92-95. (in Chinese))
[6]	SANTAMARINA J C, KLEIN K A, WANG Y H, et al. Specific surface: determination and relevance[J]. Canadian Geotechnical Journal, 2002, 39: 233-241.
[7]	DANIELS J L, INYANH H I, BROCHU Jr M. Speciﬁc surface area of barrier mixtures at various outgas temperature[J]. Journal of Environmental and Engineering Geophysics, 2004, 130(8): 867-872.
[8]	ARNEPALLI D N, SHANTHAKUMAR S, RAO B Hanumantha, et al. Comparison of methods for determining specific-surface area of fine-grained soils[J]. Geotechnical and Geological Engineering, 2008, 26: 121-132.
[9]	TULLER M, OR D. Water films and scaling of soil characteristic curves at low water contents[J].Water Rescources Reserch, 2005, 41(9): 319-335.
[10]	谭罗荣, 张梅英, 邵梧敏, 等. 风干含水率W65用作膨胀土判别分类指标的可行性研究[J]. 工程地质学报, 1994, 2(1): 15-26. (TAN Luo-rong, ZHANG Mei-ying, SHAO Wu-min, et al. The practicability research on use of air drymoisture content W65 as identification index of theswelling soil[J]. Journal of Engineering Geology, 1994, 2(1): 15-26. (in Chinese))
[11]	GB/ T50123—1999土工实验方法标准[S]. 1999. (GB/ T50123—1999 Standard for soil test method[S]. 1999. (in Chinese))
[12]	GB/T14684—201建设用砂[S]. 2012. GB/T14684—201建设用砂[S]. 2012. (GB/T14684—201 Sand for Construction[S]. 2012. (in Chinese))
[13]	EN933—9 Tests for geometrical properties of aggregates-part 9: assessment of fines-methylene blue test[S]. 2009.
[14]	SDS 01—79土工试验规程[S]. 北京: 水利出版社, 1981.( SDS 01—79 Specification of soil test[S]. Beijing: China Water & Power Press, 1981. (in Chinese))
[15]	谭罗荣, 孔令伟. 特殊岩土工程土质学[M]. 北京: 科学出版社, 2006. (TAN Luo-rong KONG Ling-wei. Geotechnical engineering behavior of special rock and soil[M]. Beijing: Science Press, 2006. (in Chinese))
[16]	THENG B K G, RISTORI G G, SANTI C A, et al. An improved method for the determining the specific surface areas of topsoils with varied organic matter content, texture and clay mineral composition[J]. European Journal of Soil Science, 1999, 50: 309-316.
[17]	YUKSELEN Y, KAYA A. Comparison of methods for determining specific surface area of soils[J]. Journal of Geotechnical And Geoenvironmental Enginering, ASCE, 2006, 132(7): 931-936.
[18]	YELIZ Y, ABIDIN K. Suitability of the methylene blue test for surface area, caion exchange capacity and swell potential determination of clayey soils[J]. Engineering Geology, 2008, 102: 38-45.
[19]	MATEJ M, ALENKA M, ANA M, et al. A comparison of methods used to characterize the soil specific surface area of clays[J]. Applied Clay Science, 2013(83/84): 144-152.
[20]	LOCAT J, LEFEBVRE G, BALLIVY G. Mineralogy, chemistry,and physical properties interrelationships of some sensitive clays from eastern Canada[J]. Canadian Geotechnical Journal, 1984, 21: 530-540.
[21]	BOJANA D, STANISLAV S. Atterberg limits in relation to other properties of fine-grained soils[J]. ACTA Geotechnica Slovenica, 2013, 10(2): 4-13.
[22]	BOJANA D, LUDVIK T. Liquid limit and specific surface of clay particles[J]. Geotechnical Testing Journal, 2004, 27(6): 580-584.