[1]李敏,王宸,谢首斌.二灰固化石油污染盐渍土的力学增强演变机制[J].深圳大学学报理工版,2018,35(No.2(111-220)):119-127.[doi:10.3724/SP.J.1249.2018.02119]
 LI Min,WANG Chen,et al.Formation and development of oil contaminated saline soil solidified with lime and fly ash[J].Journal of Shenzhen University Science and Engineering,2018,35(No.2(111-220)):119-127.[doi:10.3724/SP.J.1249.2018.02119]
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二灰固化石油污染盐渍土的力学增强演变机制()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第35卷
期数:
2018年No.2(111-220)
页码:
119-127
栏目:
土木建筑工程
出版日期:
2018-03-20

文章信息/Info

Title:
Formation and development of oil contaminated saline soil solidified with lime and fly ash
文章编号:
201802002
作者:
李敏12王宸1谢首斌3
1) 河北工业大学土木与交通学院,天津 300401
2)河北省土木工程技术研究中心,天津 300401
3)中航天建设工程有限公司,北京 100071
Author(s):
LI Min1 2 WANG Chen1 and XIE Shoubin3
1) School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, P.R.China
2) Hebei Research Center of Civil Engineering Technology, Tianjin 300401, P.R.China
3) Zhonghangtian Construction Engineering Co. Ltd., Beijing 100071, P.R.China
关键词:
石油污染土无侧限抗压强度响应面法扫描电镜石灰粉煤灰固化滨海盐渍土
Keywords:
oil-contaminated soil unconfined compressive strength response surface methodology scanning electron microscope lime and fly ash treatment inshore saline soil
分类号:
TU 32
DOI:
10.3724/SP.J.1249.2018.02119
文献标志码:
A
摘要:
为实现石油污染土固化处置后资源化利用,通过无侧限抗压和扫描电镜试验,探讨在不同龄期下,石灰质量分数、粉煤灰质量分数和石油污染水平的交互作用,依托响应面法分析固化污染土强度的形成、发展及固化增强机制. 结果表明,固化初期(7 d内),污染水平较大和二灰质量分数较小(石灰4%、粉煤灰18%)均有利于改善土体整体性,过量二灰易于造成土体膨胀和水分进入;固化中期(7~14 d),固化反应以化学作用为主,固化材料的火山灰反应致所需二灰质量分数增加较大;石油的物理包容对火山灰反应存在延迟作用,导致固化后期(14~28 d)强度仍有较大增长,生成物与粉煤灰协同固化石油污染物和重度污染土形成结构疏松的大型团聚体,降低了生成物的结晶程度.建议针对重度石油污染土,适当延长龄期和增加二灰质量分数,以使强度趋于稳定,确保固化材料性能得到充分发挥.
Abstract:
To realize resource utilization of solidified oil contaminated soil, unconfined compressive strength and scanning electron microscope (SEM) experiments are used to quantify the interaction of lime content,fly ash content and oil-contaminated level under different curing periods. The response surface methodology is employed to optimize the formation and development of solidified soil strength and solidification mechanism. Results show that in the early curing (less than 7 d), the larger oil content and smaller lime and lay ash content (4% and 18%) are beneficial to the improvement of soil integrity, but excessive lime causes soil swelling and moisture entry. During the curing period of 7-14 d, solidified reaction is converted into chemical action, pozzolanic reaction between the solidified materials leads to a larger increase of lime and fly ash content. The pozzolanic reaction delayed by the physical entrapment of oil causes that the strength at the final stage of solidification (14-28 d) still increases greatly, the resultants and fly ash combined with solidified oil pollutants, and the heavily oil contaminated soil form large aggregates with loose structure which reduces the degree of crystallization of resultants. As to the heavily oil contaminated soil, it is suggested that we should properly increase the lime, fly ash content and extend curing period in order to stabilize the strength and ensure the performance of solidified materials.

参考文献/References:

[1] KERMANI M, EBADI T. The effect of oil contamination on the geotechnical properties of fine-grained soils[J]. Soil and Sediment Contamination, 2012, 21(5): 655-671.
[2] 杜卫东,万云洋,钟宁宁,等. 土壤和沉积物石油污染现状[J].武汉大学学报理学版,2011,57(4):311-322.
DU Weidong,WAN Yunyang,ZHONG Ningning,et al. Current status of petroleum-contaminated soils and sediments[J]. Journal of Wuhan University Natural Science,2011,57(4):311-322.(in Chinese)
[3] RAHMAN Z A, HAMZAH U, TAHA M R, et al. Influence of oil contamination on geotechnical properties of basaltic residual soil[J]. American Journal of Applied Sciences, 2010, 7(7): 954-961.
[4] TAHA R, AL-RAWAS A, AL-ORAIMI S, et al. The use of brackish and oil-contaminated water in road construction[J]. Environmental & Engineering Geoscience, 2005, 11(2): 163-169.
[5] AL-RAWAS A, HASSAN H F, TAHA R, et al. Stabilization of oil-contaminated soils using cement and cement by-pass dust[J]. Management of Environmental Quality, 2005, 16(6): 670-680.
[6] 宋敏英. 含硝基苯危险废物固化/稳定化技术研究[D]. 北京: 北京工商大学, 2010.
SONG Minying. Solidification/stabilization research of hazardous waste containing nitrobenzene[D]. Beijing: Beijing Technology and Business University, 2010.(in Chinese)
[7] 何小红. 长春地区柴油污染土性质及水泥固化效果研究[D]. 吉林大学, 2015.
HE Xiaohong. A study on diesel contaminated soil properties and cement solidification effect of Changchun area[D]. Changchun: Jilin University, 2015.(in Chinese)
[8] RUQAYYAH T I D, JAMAL P, ALAM M Z, et al. Application of response surface methodology for protein enrichment of cassava peel as animal feed by the white-rot fungus Panus tigrinus M609RQY[J]. Food Hydrocolloids, 2014, 42: 298-303.
[9] JTG E40—2007公路土工试验规程[S].
JTG E40—2007 Test methods of soils for highway engineering[S].(in Chinese)
[10] 李敏, 王宸, 杜红普, 等. 石灰粉煤灰联合固化石油污染滨海盐渍土的力学特性[J]. 岩石力学与工程学报, 2017, 36(s1): 3578-3586.
LI Min, WANG Chen, DU Hongpu, et al. Mechanical properties of oil contaminated saline soil solidified with lime and fly ash[J], Chinese Journal of Rock Mechanics and Engineering, 2017, 36(s1): 3578-3586.(in Chinese)
[11] 祝瑜, 杨英姿, 姚燕, 等. SAP对高延性水泥基复合材料弯曲性能的影响[J]. 深圳大学学报理工版, 2014, 31(2): 193-197.
ZHU Yu, YANG Yingzi, YAO Yan, et al. Effect of superabsorbent polymer particles on the flexural properties of engineered cementitious composites[J]. Journal of Shenzhen University Science and Engineering, 2014, 31(2): 193-197.(in Chinese)
[12] 王东星, 徐卫亚. 固化淤泥长期强度和变形特性试验研究[J]. 中南大学学报自然科学版, 2013, 44(1): 332-339.
WANG Dongxing, XU Weiya. Experimental study on long-term strength and deformation properties of solidified sediments[J]. Journal of Central South University Science and Technology, 2013, 44(1): 332-339.(in Chinese)
[13] 谢首斌, 李敏, 杜红普, 等. 环境温度对石油污染滨海盐渍土强度及变形特性的影响[J]. 工程地质学报, 2016, 24(4):616-621.
XIE Shoubin, LI Min, DU Hongpu, et al. Influence of environment temperature on strength and deformation of saline soil in inshore contaminated by petroleum[J]. Journal of Engineering Geology, 2016, 24(4):616-621.(in Chinese)
[14] 赵德安, 余云燕, 马惠民, 等. 南疆铁路路基次生盐渍化试验研究[J]. 岩土工程学报, 2014, 36(4): 745-751.
ZHAO De’an, YU Yunyan, MA Huimin, et al. Secondary salinization of subgrade of southern Xinjiang Railway[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(4): 745-751.(in Chinese)
[15] MUTHUKUMAR V, RAJESH N, VENKATASAMY R, et al. Mathematical modeling for radial overcut on electrical discharge machining of Incoloy 800 by response surface methodology[J]. Procedia Materials Science, 2014, 6: 1674-1682.
[16] YANG P, FANG M, LIU Y W. Optimization of a phase adjuster in a thermo-acoustic stirling engine using response surface methodology[J]. Energy Procedia, 2014, 61: 1772-1775.

备注/Memo

备注/Memo:
Received:2017-08-12;Accepted:2018-01-02
Foundation:National Natural Science Foundation of China (41272335,51409079);Youth Foundation of Hebei Province(E2014202104);Doctoral Fund of the Ministry of Education of China(20131317120013)
Corresponding author:Associate professor LI Min. E-mail:limin-0409@163.com
Citation:LI Min,WANG Chen,XIE Shoubin,et al.Formation and development of oil contaminated saline soil solidified with lime and fly ash [J]. Journal of Shenzhen University Science and Engineering, 2018, 35(2): 119-127.(in Chinese)
基金项目:国家自然科学基金资助项目(41272335,51409079);河北省自然科学基金资助项目(E2014202104);教育部博士点基金资助项目(20131317120013)
作者简介:李敏(1985—),女,河北工业大学副教授、博士. 研究方向:污染土处置. E-mail:limin-0409@163.com
引文:李敏,王宸,谢首斌.二灰固化石油污染盐渍土的力学增强演变机制[J]. 深圳大学学报理工版,2018,35(2):119-127.
更新日期/Last Update: 2018-03-07