[1]查甫生,刘松玉,杜延军.石灰-粉煤灰改良膨胀土试验[J].东南大学学报(自然科学版),2007,37(2):339-344.[doi:10.3969/j.issn.1001-0505.2007.02.031]
 Zha Fusheng,Liu Songyu,Du Yanjun.Experiment on improvement of expansive clays with lime-fly ash[J].Journal of Southeast University (Natural Science Edition),2007,37(2):339-344.[doi:10.3969/j.issn.1001-0505.2007.02.031]
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石灰-粉煤灰改良膨胀土试验()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第2期
页码:
339-344
栏目:
土木工程
出版日期:
2007-03-20

文章信息/Info

Title:
Experiment on improvement of expansive clays with lime-fly ash
作者:
查甫生 刘松玉 杜延军
东南大学岩土工程研究所, 南京 210096
Author(s):
Zha Fusheng Liu Songyu Du Yanjun
Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China
关键词:
膨胀土 粉煤灰 改良 无侧限抗压强度
Keywords:
expansive soil fly ash improvement unconfined compressive strength
分类号:
TU443
DOI:
10.3969/j.issn.1001-0505.2007.02.031
摘要:
探讨利用粉煤灰、石灰-粉煤灰作为添加剂改良合肥膨胀土的可行性与改良效果.试验研究了粉煤灰、石灰-粉煤灰掺合物对膨胀土的基本工程性质指标、击实特性、胀缩性以及无侧限抗压强度的影响特征.试验研究结果表明,随着掺灰率的增加,膨胀土的塑性指数、活性指数、自由膨胀率、膨胀量、膨胀力与线缩率呈减小趋势,这说明掺粉煤灰可有效降低膨胀土的胀缩性.经过一定龄期养护后的击实样的膨胀试验结果表明,随着养护龄期的增加,膨胀土的膨胀量与膨胀力都有一定降低.无侧限抗压强度试验结果表明:没有经过养护的土样,粉煤灰对无侧限抗压强度的影响不明显; 经过7 d龄期养护后,随着掺粉煤灰率的增加,土样的无侧限抗压强度具有一定程度的增长,并且无侧限抗压强度存在一个峰值点.
Abstract:
The swelling, swelling pressure and moisture dependent shear strength of expansive soils pose serious problems to civil engineers. Disposal of large quantities of fly ash, which is an industrial waste, poses an environmental problem. In this study, the potential use and effectiveness of fly ash without or with lime as an additive in improving expansive soils are evaluated. The test results show that the plasticity index, activity, free swell index, swell potential, swelling pressure and axial shrinkage percent decrease with the increase of fly ash or fly ash-lime content. These indicate the effectiveness of fly ash in reducing the swell-shrinking potential of the soils. It is found that with the increase of the curing time, the swell potential and swelling pressure reduce. The unconfined compressive strength test results show that there is no remarkable change in the unconfined compressive strength of the soils immediately treated with fly ash alone. However, 7 days curing brings a remarkable increase in the unconfined compressive strength.

参考文献/References:

[1] 廖世文.膨胀土与铁道工程[M].北京:中国铁道出版社,1984.
[2] Cokca E.Use of class C fly ash for the stabilization of an expansive soil [J]. Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2001,127(7):568-573.
[3] Nalbantoglu Z,Gucbilmez E.Improvement of calcareous expansive soils in semi-arid environments[J].Journal of Arid Environments,2001,47(4):453-463.
[4] Nalbantoglu Z.Effectiveness of class C fly ash as an expansive soil stabilizer [J].Construction and Building Materials,2004,18(6):377-381.
[5] Kumar B R P,Sharma R S.Effect of fly ash on engineering properties of expansive soils [J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2004,130(7):764-767.
[6] Kate J M.Strength and volume change behavior of expansive soils treated with fly ash [C] //ASCE Conference Proceedings. Austin,TX,USA,2005.
[7] Shi B,Jiang H T,Liu Z B,et al.Engineering geological characteristics of expansive soils in China [J]. Engineering Geology,2002,67(1/2):63-71.
[8] Chen F H. Foundations on expansive soils[M].Amsterdam:Elsevier Science,1975.
[9] 中华人民共和国交通部.公路土工试验规程[S].北京:人民交通出版社,1993.
[10] Mitchell J K. Fundamentals of soil behavior [M].2nd ed.New York:Wiley& Sons,1993.
[11] Narasimha R S,Rajasekaran G.Reaction products formed in lime-stabilized marine clays [J].Journal of Geotechnical Engineering,ASCE, 1996,122(5):329-336.
[12] Nalbantoglu Z,Gucbilmez E.Utilization of an industrial waste in calcareous expansive clay stabilization [J]. Geotechnical Testing Journal,2002,25(1):78-84.
[13] Lees G,Abdelkader M O,Hamdani S K.Effect of the clay fraction on some mechanical properties of lime-soil mixtures [J]. J Inst High Engr,1982,11(1):3-9.
[14] Bell F G.Lime stabilization of clay minerals and soils [J]. Engineering Geology, 1996,42(1/2):223-237.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(50478073).
作者简介: 查甫生(1978—),男,博士生; 刘松玉(联系人),男,博士,教授,博士生导师,liusy@seu.edu.cn.
更新日期/Last Update: 2007-03-20