垃圾填埋场污泥灰改性黏土衬垫的强度特性及微观结构
作者：
董祎挈;陆海军;李继祥;徐文颖
期刊：
岩土力学 ,2015年36(S1):187-192 ISSN：1000-7598
通讯作者：
Lu, Hai-Jun
作者机构：
[李继祥; 陆海军; 董祎挈; 徐文颖] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, 430023, China
通讯机构：
Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, 430023, China
会议名称：
中国土木工程学会第十二届全国土力学及岩土工程学术大会
会议时间：
2015-01-01
会议地点：
中国上海
会议论文集名称：
中国土木工程学会第十二届全国土力学及岩土工程学术大会论文摘要集
关键词：
污泥灰(SSA);垃圾渗沥液;剪切变形;孔隙结构
摘要：
为评价污泥灰改性黏土作为填埋场衬垫防渗材料的可行性,分析污泥灰改性黏土强度特性及孔隙结构,针对受垃圾渗沥液腐蚀的纯黏土与污泥灰掺量为1%~5%的改性黏土,采用直接剪切试验分析其抗剪强度变化规律,采用低温氮气吸附试验分析剪切变形后试样的孔隙结构组成。结果表明,改性黏土属于Ⅵ型等温线,并存在H3型滞后环,且2~6 nm介孔的数量占比较大。受垃圾渗沥液腐蚀后,黏土抗剪强度大幅下降,黏聚力与内摩擦角分别下
语种：
中文
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刚性纤维增强透水混凝土配合比的试验研究
作者：
刘肖凡;李继祥
期刊：
河北工业大学学报 ,2015年44(6):104-107 ISSN：1007-2373
作者机构：
武汉轻工大学土木工程与建筑学院,湖北武汉,430023;[李继祥; 刘肖凡] 武汉轻工大学
关键词：
透水混凝土;刚性聚合纤维;抗压强度;透水性能
摘要：
为改善透水混凝土的抗压强度和透水性能,将刚性聚合纤维和聚合物乳液掺入透水混凝土材料,采用正交试验分析了包括骨料粒径、水灰比、纤维掺量、乳液掺量4个因素的配合比对透水混凝土抗压强度和透水系数的影响.结果表明:水灰比和骨料粒径是影响透水混凝土抗压强度的主要因素,刚性聚合纤维可以在不降低透水混凝土抗压强度的基础上提高其透水性能,聚合物乳液对透水混凝土性能的提高作用不明显.推荐刚性纤维改性透水混凝土的配合比为水灰比0.3,骨料粒径10 ～15 mm,纤维掺量0.2％,聚合物乳液掺量20％.
语种：
中文
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The Leachate Release and Microstructure of the Sewage Sludge under the Anaerobic Fermentation
作者：
Dong, Yiqie;Lu, Haijun* ;Li, Jixiang;Wang, Changhong
期刊：
Journal of Chemistry ,2015年2015 ISSN：2090-9063
通讯作者：
Lu, Haijun
作者机构：
[Wang, Changhong; Lu, Haijun; Dong, Yiqie; Li, Jixiang] Wuhan Polytech Univ, Inst Porous Mech, Wuhan 430023, Peoples R China.
通讯机构：
[Lu, Haijun] W;Wuhan Polytech Univ, Inst Porous Mech, Wuhan 430023, Peoples R China.
摘要：
Pollutant release, pore structure, and thermal effect of sewage sludge during anaerobic fermentation were investigated. Results showed that the pH value firstly declined and then increased during anaerobic fermentation. The BODand organics of sewage sludge declined, and the BODof samples which was originally neutral declined as much as 53.6%. The micropore of samples was relatively developed. The biggest adsorption amount was 69.2 cm3/g. The average pore size was enlarged about 16.0-19.8% under anaerobic fermentation. There existed endothermic valley during heating procedure of 0-200°C because of the dehydration, and the mass loss was 60.9-72.5%. The endothermic valley of the sample fluctuated at the 14th day in the anaerobic fermentation. During the heating procedure of 200-600°C, there existed exothermal peaks because of the oxidation and burning of the organics. The curve of sample which was originally neutral had comparatively large endothermic valley and exothermal peak. © 2015 Yiqie Dong et al.
语种：
英文
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月桂酸-膨胀珍珠岩相变墙体材料基本性能研究
作者：
刘杰胜;刘科;吴月;朱蓉洁;李仕洪;...
期刊：
砖瓦 ,2015年(3):16-18 ISSN：1001-6945
作者机构：
武汉轻工大学土木工程与建筑学院,湖北 武汉,430023;湖北省建筑科学研究设计院,湖北 武汉,430071;[朱蓉洁; 刘科; 刘杰胜; 李继祥; 李仕洪; 吴月; 董莪] 武汉轻工大学;[黄旭] 湖北省建筑科学研究设计院股份有限公司
关键词：
月桂酸;膨胀珍珠岩;相变墙体材料
摘要：
以月桂酸和膨胀珍珠岩制备复合相变材料，掺入水泥砂浆制备相变保温墙体材料，研究其相变墙体保温砂浆的基本性能。研究结果表明：复合相变材料的掺入，减小了相变墙体砂浆的堆积密度、干制品密度、导热系数和保水率，但吸水率有一定程度增大，为制备高性能的相变储能材料奠定一定基础。
语种：
中文
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The Adsorption Capacity and Geotechnical Properties of Modified Clay Containing SSA Used as Landfill Liner-Soil Materials
作者：
Lu, Haijun* ;Dong, Yiqie;Li, Jixiang;Wang, Changhong
期刊：
Journal of Chemistry ,2015年2015:1-7 ISSN：2090-9063
通讯作者：
Lu, Haijun
作者机构：
[Lu, Haijun] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China.;[Wang, Changhong; Lu, Haijun; Dong, Yiqie; Li, Jixiang] Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.
通讯机构：
[Lu, Haijun] C;Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China.
摘要：
The potential of clay containing 0 similar to 5% sewage sludge ash (SSA) is assessed for use as a landfill liner-soil material. Low temperature N-2 adsorption, batch adsorption, permeability, and unconfined compressive strength tests are performed to evaluate pore structure, adsorption capacity, hydraulic conductivity, and unconfined compressive strength of the clays. The pore size distribution of the modified clay containing SSA ismainly composed of micropores (< 2 nm) andmesopores (2 similar to 7 nm). With the increasing of SSA from 0% to 5%, the adsorption capacity of Zn(II) and Cu(II) to the clay increases 37% and 273%, respectively. The hydraulic conductivity of modified clay is from 3.62 x 10(-8) to 2.17 x 10(-8) cm/s. At SSA = 3%, the unconfined compressive strength of the clay reaches the maximum value of 601.1 kPa. After the clay containing SSA is contaminated by acid and alkali chemical solutions, the amount of mesopores and hydraulic conductivity increase. The adsorption capacity and unconfined compressive strength of contaminated clay decrease about 2 similar to 44% and 25.7 similar to 38.2%, respectively. The modified clay containing SSA can meet the adsorption and geotechnical requirement of landfill liners.
语种：
英文
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垃圾渗沥液腐蚀下污泥灰改性黏土压缩特性及孔隙结构
作者：
董祎挈;陆海军;李继祥
期刊：
中国环境科学 ,2015年35(7):2072-2078 ISSN：1000-6923
通讯作者：
Lu, Hai-Jun
作者机构：
[陆海军; 李继祥; 董祎挈] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, China
通讯机构：
Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, China
关键词：
污泥灰;垃圾渗沥液;固结压缩;孔隙结构;颗粒组成
摘要：
采用市政污泥为原材料烧制污泥灰,并将污泥灰作为改良添加剂对传统填埋场压实黏土衬垫系统进行改性,以达到实现污泥资源化利用以及减少黏土作为衬垫防渗材料的用量.为评价污泥灰改性黏土作为填埋场衬垫材料的工程特性以及微观结构,通过固结压缩试验、低温氮气吸附试验、颗粒分析试验分别检测改性黏土的压缩特性、微观孔隙结构、颗粒组成.压缩试验结果表明,受垃圾渗沥液腐蚀后的改性黏土,随污泥灰含量的增加,孔隙比增大、压缩量减小;经垃圾渗沥液腐蚀后,改性黏土的压缩系数(α1-2)为0.310~0.391 MPa~(-1),固结系数(Cv)为2.446~2.768cm~2/s.低温氮气吸附试验结果表明,改性黏土的吸附-脱附等温线属于Ⅴ型等温线;对于垃圾渗沥液腐蚀的改性黏土,孔径分布呈双肩峰形式,孔径为3~7nm的孔隙占比较大,累计孔容为0.509~0.530cm~3/g.颗粒分析试验结果显示,受渗沥液腐蚀后改性黏土颗粒组成差异性明显,粒径>11.5 μm的颗粒为35.09%~49.42%;粒径为2.3~1.5 μm的颗粒为2.35%~7.28%;粒径<2.3 μm的颗粒为46.57%~57.63%.污泥灰改性黏土具有较好的抗垃圾渗滤液腐蚀效果,可将其作为填埋场衬垫材料使用.
语种：
中文
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Cracking and water seepage of Xiashu loess used as landfill cover under wetting–drying cycles
作者：
Lu, Haijun;Li, Jixiang* ;Wang, Weiwei;Wang, Changhong
期刊：
Environmental Earth Sciences ,2015年74(11):7441-7450 ISSN：1866-6280
通讯作者：
Li, Jixiang
作者机构：
[Wang, Changhong; Lu, Haijun; Wang, Weiwei; Li, Jixiang] Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.
通讯机构：
[Li, Jixiang] W;Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.
关键词：
Landfill cover;Cracks;Pores;Hydraulic conductivity;Water seepage
摘要：
This paper intends to investigate the anti-seepage characteristics of Xiashu loess used as landfill cover under wetting–drying cycles. A series of tests were performed to systematically evaluate the surface cracks, pores, the hydraulic conductivity and water seepage of the soil under wetting–drying cycles. The cracking tests indicated that the cracking intensity factor (CIF) increased with the number of wetting–drying cycles. After three wetting–drying cycles, the CIF gradually reached a stable value. The influence of the compactness of the compacted clay was significant to cracking. After four drying–wetting cycles, the CIF of compacted clay with relatively low compactness (ρ=1.65g/cm3, W5=25%) was 0.15, and the CIF of compacted clay with higher compactness (ρ=1.65g/cm3, W3=21%) was only 0.06. With the increase in the number of wetting–drying cycles, the accumulated pore volume of the soil particles increased and the maximum pore size was nearly unchanged. After four drying–wetting cycles, the proportion and average diameter of macro-pore in the soil particles were both increased. However, the proportion and average diameter of the meso-pore slightly decreased. Furthermore, the proportion and average diameter of the micro-pores were unchanged. After four wetting–drying cycles, the hydraulic conductivity of the compacted soil was at 8.3×10−7–1.5×10−5cm/s, which was increased about three orders of magnitude compared with the compacted soil without cracks. The hydraulic conductivity of compacted soil increased linearly as cracks increased. The hydraulic conductivity of compacted soil also gradually increased to a stable value as the pore volume increased. After 1 month of wetting–drying cycles, the cracks of soil with low compactness had extended to a depth of 15cm below the soil surface while the cracks of soil with higher compactness only reached a depth of 5cm. © 2015, Springer-Verlag Berlin Heidelberg.
语种：
英文
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Laboratory evaluation of silicone rubber sealant and application in crack maintenance of pavement
作者：
Jiesheng, Liu;Ke, Liu;Lian, Xue;Jixiang, Li
期刊：
Electronic Journal of Geotechnical Engineering ,2015年20(13):5883-5894 ISSN：1089-3032
通讯作者：
Jiesheng, Liu(wsljs628@yahoo.com)
作者机构：
[Ke, Liu; Jixiang, Li; Jiesheng, Liu] School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, China;[Lian, Xue; Jixiang, Li; Jiesheng, Liu] Wuhan Wuchang Hospital, China
通讯机构：
School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, China
关键词：
Crack sealing;Maintenance;Pavement;Silicone rubber
摘要：
In the present study, the sealing treatment of pavement cracks was repaired by synthesizing silicone rubber (SR) sealant. Laboratory tests on the silicone rubebr sealant were conducted from the aspects of bond strength and bond fatigue stability. Some of the tests conducted included a freeze-thaw stability test, hot compression-cold drawing stability and chemical stability test that evaluated the durability properties of the sealant. Through the laboratory tests, it has been observed that the silicone rubber sealant has the ability to bond to concrete substrate materials and show excellent durability properties under harsh conditions in comparison with the commercial polysulfide. The overall findings indicate that the silicones' performance is superior to that of the polysulfide. Crack sealing procedures of silicone rubber sealant were introduced and the field survey showed that silicone rubber sealant is an attractive selection for use in the crack repairing in the pavements. ©2015 ejge.
语种：
英文
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混凝土结构精品课程建设与土木工程专业人才创新能力培养
作者：
吴建林;黎丹;李继祥
期刊：
中国建设教育 ,2015年(01):27-28 31
作者机构：
武汉轻工大学土木工程与建筑学院
关键词：
混凝土结构课程;精品课程建设;创新能力培养
摘要：
通过混凝土结构精品课程建设,将面向21世纪的人才培养模式、教学内容、课程体系和教学方法的改革引向深入,实现以传授知识为重向知识、能力、素质并重转变,注重学生创新精神、创造能力的培养,注重学生个性的发展,全面因材施教。在课程内容、课程授课、课程设计、毕业设计等环节上进行优化,提高学生素质和创新能力。
语种：
中文
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水泥固封镉污染土离子释放规律与微观结构
作者：
董祎挈;陆海军;李继祥
期刊：
环境工程学报 ,2015年9(9):4578-4584 ISSN：1673-9108
通讯作者：
Lu, H.
作者机构：
[董祎挈; Lu H.; 陆海军] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, 430023, China
通讯机构：
[Lu, H.] I;Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, China
关键词：
固化;镉污染黏土;污染物释放;孔隙结构;热效应
摘要：
为了评价2%、5%、10%水泥固封镉污染土的处理效果,采用污染物释放实验、低温氮气吸附实验、热重-差热分析实验,检测水泥固封体的Cd~(2 +)浸出浓度、孔隙结构、物质组成与相变规律。未经水泥固封处理的镉污染土,其浸出液中Cd~(2 +)浓度高达9.72 mg /L;当水泥掺量> 5%后,水泥固封体的Cd~(2 +)浸出浓度低于国家标准1 mg /L,说明经水泥固封处理后的镉污染土对污染物的释放具有较好的密封效果。水泥固封镉污染土吸附脱附等温线属于IV型, 且存在H_3型滞回环。随着水泥掺量的增加,孔径为8 ~ 12 nm的孔隙数量增多;总孔容表现出先减少后增大的趋势,且水泥含量为10% 时,总孔容达到最大值,其值为0.151 cm3 /g。未经水泥固封处理的镉污染土,温度达到1 000℃时,质量损失为12.82%,且存在一个吸热谷;而经水泥固封处理后,水泥固封体的质量损失达到18.6% ~ 31.3%,且在200 ~ 450℃之间存在明显放热峰。
语种：
中文
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透水混凝土孔隙率和渗透系数影响因素研究
作者：
白晓辉;刘肖凡;李继祥;王展展
期刊：
武汉轻工大学学报 ,2014年(3):80-83 ISSN：2095-7386
作者机构：
武汉轻工大学土木工程与建筑学院,湖北武汉,430023;[白晓辉; 王展展; 李继祥; 刘肖凡] 武汉轻工大学
关键词：
透水混凝土;孔隙率;渗透系数;变化规律
摘要：
对透水混凝土孔隙率和渗透系数各个影响因素的分析和研究,并根据试验数据进行曲线拟合得出孔隙率和透水系数之间的变化规律。影响透水混凝土强度的主要因素为透水混凝土的孔隙率,影响孔隙率和渗透系数的主要因素为骨料粒径、制作工艺、粘结剂掺量和外加剂掺量等。
语种：
中文
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粉煤灰透水混凝土孔隙率和渗透系数的试验研究
作者：
白晓辉;刘肖凡;李继祥;王展展
期刊：
建筑科技 ,2014年(5):5-7 ISSN：2096-3815
作者机构：
武汉轻工大学土木工程与建筑学院,湖北 武汉,430023;[白晓辉; 刘肖凡; 李继祥; 王展展] 武汉轻工大学
关键词：
粉煤灰;透水混凝土;降水头法;孔隙率;渗透系数
摘要：
粉煤灰等量取代水泥进行透水混凝土强度的改性有明显的效果，然而随着强度的提高，透水混凝土的孔隙率和渗透系数也有明显降低。通过测定不同掺量粉煤灰取代水泥改性透水混凝土的孔隙率和渗透系数并进行对比，研究粉煤灰透水混凝土内部结构的变化，分析不同集料粒径透水混凝土粉煤灰掺量对孔隙率和渗透系数的影响。结果表明，采用体积法测定透水混凝土的孔隙率，两种集料透水混凝土的孔隙率基本都保持在15%以上；透水混凝土渗透性能较好，过水断面流水速度大，上下水头变化较大，故建议采用降水头法测定其渗透系数；粉煤灰的掺加对小粒径透水混凝土孔隙堵塞较大粒径透水混凝土严重，渗透系数下降明显。
语种：
中文
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我国低碳交通建设探讨
作者：
刘杰胜;刘科;张娟;李继祥;董莪
期刊：
现代商贸工业 ,2014年(20):63 ISSN：1672-3198
作者机构：
武汉轻工大学土木工程与建筑学院,湖北武汉,430023;[刘科; 张娟; 刘杰胜; 李继祥; 董莪] 武汉轻工大学
关键词：
低碳交通;措施
摘要：
首先介绍了低碳交通的概念,分析了我国建设低碳交通面临严峻形势,提出了建设低碳交通的主要途径和措施。
语种：
中文
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有机硅聚合物防水抗裂砂浆性能研究
作者：
木子佳靓;刘杰胜;李继祥;刘辉凯;梁超峰;...
期刊：
武汉轻工大学学报 ,2014年33(1):81-84 ISSN：2095-7386
作者机构：
武汉轻工大学土木工程与建筑学院,湖北武汉,430023;[刘杰胜; 余荆城; 木子佳靓; 刘辉凯; 李继祥; 梁超峰; 冯彪] 武汉轻工大学
关键词：
有机硅;水泥砂浆;防水;抗裂
摘要：
通过测试内掺有机硅聚合物防水抗裂砂浆的力学性能、吸水率、抗裂性能和抗酸碱腐蚀性能,综合评价了掺不同剂量有机硅后水泥砂浆的各项性能指标,并推荐掺量为5%有机硅的配合比,为实际工程提供借鉴。
语种：
中文
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石蜡-膨胀珍珠岩复合相变材料研究
作者：
刘杰胜;刘科;朱蓉洁;吴月;李仕洪;...
期刊：
砖瓦 ,2014年(12):55-56 ISSN：1001-6945
作者机构：
武汉轻工大学土木工程与建筑学院,湖北 武汉,430023;湖北省建筑科学研究设计院,湖北 武汉,430071;[朱蓉洁; 刘科; 刘杰胜; 李继祥; 李仕洪; 吴月; 夏琳] 武汉轻工大学;[黄旭] 湖北省建筑科学研究设计院股份有限公司
关键词：
相变;石蜡;膨胀珍珠岩
摘要：
以石蜡熔合膨胀珍珠岩制备复合相变材料,对复合相变材料的容留量、渗透性以及耐久性进行了研究.研究结果表明,石蜡-膨胀珍珠岩复合相变材料耐久稳定性良好.容留量结果表明浸渍时间为2 h,浸渍温度为50 ℃时,石蜡与膨胀珍珠岩融合较好.
语种：
中文
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稻壳/稻壳灰在墙体材料领域中的应用研究
作者：
刘杰胜;张娟;夏琳;李继祥;董莪
期刊：
砖瓦 ,2014年(10):72-74 ISSN：1001-6945
作者机构：
武汉轻工大学土木工程与建筑学院,湖北 武汉,430023
关键词：
稻壳/稻壳灰;墙体材料;应用
摘要：
介绍了稻壳/稻壳灰主要组成和特性。总结了稻壳在建筑墙体材料中的主要利用途径及相关研究进展，展示了稻壳的广阔利用前景。
语种：
中文
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Experimental research on the water cross section performance of porous concrete
作者：
X.H.Bai;X.F.Liu;J.X.Li;Z.Z.Wang
作者机构：
[X.H.Bai; X.F.Liu; J.X.Li; Z.Z.Wang] College of Civil Engineering and Architecture,Wuhan Polytechnic University
会议名称：
2014 International Conference on Civil, Urban and Environmental Engineering (CUEE2014)
会议时间：
2014-08-19
会议地点：
中国北京
摘要：
To improve the permeability of porous concrete, the factors that affect permeability have been analyzed and compared by a theoretical and experimental method, and then the improved treatment to ensure
语种：
英文
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The geotechnical engineering properties of clay containing straw fiber under acid-base chemical solution corrosion
作者：
Hai-jun, Lu;Ji-Xiang, Li;Wei, Chen;Yi-Qie, Dong
期刊：
Electronic Journal of Geotechnical Engineering ,2014年19(I):2103-2111 ISSN：1089-3032
通讯作者：
Lu, Hai-Jun(lhj_whpu@163.com)
作者机构：
[Yi-Qie, Dong; Hai-jun, Lu; Wei, Chen; Ji-Xiang, Li] Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan, 430023, China
关键词：
Compressive strength;Hydraulic conductivity;Improved clay;Straw fiber;Void ratio
摘要：
In order to investigate the geotechnical engineering properties of the compacted clay containing straw fiber under acid-base chemical solution corrosion, a series of swelling and shrinkage, unconfined compression, permeability, direct shear and consolidation tests were performed in laboratory. Volumetric swelling and shrinkage ratio of clay containing 0.3% straw fiber decreased with increasing of acid-base chemical solution concentration, and the influence of acidic condition was more significant than alkaline condition. After acid-base chemical solution corrosion, the maximum compressive strength of improved clay were 353.37kPa˜459.15kPa. The compressive strength of all soil specimens met the engineering requirement of 200kPa. The results from permeability tests showed that the hydraulic conductivity of clay containing fiber increased with an increase of acid-base chemical solution concentration. All soil specimens had a hydraulic conductivity less than 1×10<sup>-7</sup>cm/s. The hydraulic conductivity of the improved clay fell within the narrow range of 5×10<sup>-8</sup>cm/s ˜7×10<sup>-8</sup>cm/s. The shear strength of improved clay declined under acid-base chemical solution corrosion. However, the void ratio of soil samples increased after chemical solution corrosion. ©2014 ejge.
语种：
英文
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The strength and hydraulic properties of landfill improved clay liner
作者：
Chen, Wei;Lu, Hai-Jun;Li, Ji-Xiang;Dai, Rui;Wang, Geng-Wu
期刊：
Electronic Journal of Geotechnical Engineering ,2014年19(Q):4237-4246 ISSN：1089-3032
通讯作者：
Lu, Hai-Jun(lhj_whpu@163.com)
作者机构：
[Li, Ji-Xiang; Dai, Rui; Wang, Geng-Wu; Lu, Hai-Jun; Chen, Wei] Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan, China
通讯机构：
Institute of Porous Mechanics, Wuhan Polytechnic University, China
关键词：
Hydraulic conductivity;Improved clay;Landfill;Liner system
摘要：
The potential of the improved clay containing 3 or 6% granular activated carbon (GAC) or 3 or 6% acid-activated bentonite or 5 or 10% lime was assessed for use as a landfill liner-soil material. A series of tests were conducted, swelling and shrinkage, unconfined compression, permeability, to evaluate the seepage and strength properties of the soils. For clay containing 3 or 6% GAC or 3 or 6% activated bentonite, the minimum volumetric swelling ratio were 11%~16%, and the minimum volumetric shrinkage ratio were >4%;the hydraulic conductivity were <1×10<sup>-7</sup>cm/s at a certain range of water content;the maximum unconfined compression were >200kPa. For clay containing 10% lime, the minimum volumetric swelling ratio was 0.45%, and the volumetric shrinkage ratio were <4%;the hydraulic conductivity were >1×10-7cm/s;the maximum unconfined compression was 609.3kPa. A new landfill liner system composed of two-layer soils was proposed. The upper soil layer composed of raw clay plus lime contributes significant to bearing capacity of liners, and the lower soil layer containing GAC or acid-activated bentonite contributes to anti-seepage capacity of liners. The two-layer liner system can met the anti-seepage requirement of 1×10<sup>-7</sup>cm/s;it increased bearing capacity of landfill liners.The potential of the improved clay containing 3 or 6% granular activated carbon (GAC) or 3 or 6% acid-activated bentonite or 5 or 10% lime was assessed for use as a landfill liner-soil material. A series of tests were conducted, swelling and shrinkage, unconfined compression, permeability, to evaluate the seepage and strength properties of the soils. For clay containing 3 or 6% GAC or 3 or 6% activated bentonite, the minimum volumetric swelling ratio were 11%~16%, and the minimum volumetric shrinkage ratio were >4%;the hydraulic conductivity were <1×10-7cm/s at a certain range of water content;the maximum unconfined compression were >200kPa. For clay containing 10% lime, the minimum volumetric swelling ratio was 0.45%, and the volumetric shrinkage ratio were <4%;the hydraulic conductivity were >1×10-7cm/s;the maximum unconfined compression was 609.3kPa. A new landfill liner system composed of two-layer soils was proposed. The upper soil layer composed of raw clay plus lime contributes significant to bearing capacity of liners, and the lower soil layer containing GAC or acid-activated bentonite contributes to anti-seepage capacity of liners. The two-layer liner system can met the anti-seepage requirement of 1×10-7cm/s;it increased bearing capacity of landfill liners. ©2014 ejge.
语种：
英文
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Microstructure characteristics of solidified sludge based on coal gangue and cement
作者：
Chen, Wei;Lu, Hai-jun;Li, Ji-Xiang;Wang, Geng-Wu
期刊：
Electronic Journal of Geotechnical Engineering ,2014年19(M):2989-2996 ISSN：1089-3032
通讯作者：
Lu, Hai-jun(lhj_whpu@163.com)
作者机构：
[Li, Ji-Xiang; Wang, Geng-Wu; Chen, Wei; Lu, Hai-jun] Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan, 430023, China
通讯机构：
Institute of Porous Mechanics, Wuhan Polytechnic University, China
关键词：
Microstructure;Skeleton structure;Sludge;Solidification
摘要：
In order to investigate the microstructure characteristics of solidified sludge based on coal gangue and cement in different maintenance periods, a series of low temperature N2 adsorption and TG-DTA experiments were performed in laboratory. Sludge was solidified by the principle of skeleton constructing. The coal gangue and cement were used as skeleton and cementing material for experiment, respectively. The microstructure characteristics of solidified sludge were studied under the condition of adding 0.3 kg/kg of coal gangue and 0.1 kg/kg of cement. The hysteresis loop of solidified sludge was analyzed by slit pore model. The largest aperture of solidified sludge increased relative to untreated sludge. The quantity of mesoporous with diameter of 5 to 15nm decreased with the increasing of curing age, while the quantity of mesoporous with diameter of 2 to 5nm increased. Based on TG-DTA curve, the composition of organic matter and water changed for solidified sludge. Some substances such as calcium carbonate and calcium hydroxide generated in sludge with the increase of curing age. ©2014 ejge.
语种：
英文
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