摘要：
This paper examines the feasibility of the natural soil and sewage sludge ash (SSA) mixtures, which satisfy the criteria to be used as landfill liners. The effect of SSA content on hydraulic conductivity and strength characteristics of natural soil and SSA mixtures has been investigated through a series of laboratory tests. The results demonstrate that mixtures exhibit an increase in both hydrodynamic diffusion coefficient and strength with the increasing SSA content. With the content of SSA from 0% to 5%, the values of the hydrodynamic diffusion coefficient (D) ranged from 3.5 × 10(-10) to 15 × 10(-10) cm(2)/s. The increase in the hydrodynamic diffusion coefficient is minor for low SSA content and significant for SSA content exceeding 5%. The inclusion of 5% SSA content results in a hydrodynamic diffusion coefficient that is approximately three times higher than that observed in natural soil. The results were obtained from soil triaxial tests, revealing that the mixtures containing SSA exhibited a significant increase in both the initial tangent modulus and the ultimate principal stress difference compared to those of natural soil. The SSA content with the highest value exhibits maximum initial tangent modulus and ultimate principal stress. The comprehensive analysis of the strength and hydraulic diffusion conductivity of the mixtures demonstrates that the incorporation of 3% SSA results in a significant enhancement in strength, while marginally increasing hydrodynamic diffusion coefficients. Therefore, it can be inferred that the utilization of mixtures containing 3% SSA content as a liner material is suitable.
通讯机构：
[Jing Zhang] S;State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China<&wdkj&>School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, 430023, China<&wdkj&>Author to whom correspondence should be addressed.
作者：
Bao, M. D.;Zhu, J. G.;Geng, Z. Z.;Qian, B.;He, X.
期刊：
Soil Mechanics and Foundation Engineering,2021年58(1):34-40 ISSN：0038-0741
通讯作者：
J. G. Zhu
作者机构：
[Zhu, J. G.; Bao, M. D.] Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Jiangsu Res Ctr Geotech Engn Technol, Nanjing, Peoples R China.;[Qian, B.; Geng, Z. Z.] Nanjing Hydraul Res Inst, Geotech Engn Dept, Nanjing, Peoples R China.;[He, X.] Wuhan Polytech Univ, Sch Engn & Architecture, Wuhan, Peoples R China.
通讯机构：
[J. G. Zhu] K;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Jiangsu Research Center of Geotechnical Engineering Technology, Hohai University, Nanjing, China
摘要：
To clarify some of the inconsistencies in the research of equivalent diameter of PVDs, we constructed 3-D consolidation models of PVDs and sand drains using ABAQUS and compared models with and without sand drain resistance. When the sand drain resistance was included in the model, the equivalent diameters of the sand drains were 30, 65, 78, and 100 mm (for a 100-mm-wide, 4-mm-thick PVD) corresponding to PVD drainage depths (or soft soil layer thickness) of 2, 5, 8, and 10 m. Except for the depth of 2 m, the other results were higher than the values found in previous studies. The equivalent diameters increased with increasing consolidation depths. When the well resistance was ignored, the equivalent diameters were 20 mm for all the ground consolidation depths, which was less than the value in most previous research findings.
期刊：
IOP Conference Series: Earth and Environmental Science,2021年861(7):072058 ISSN：1755-1307
作者机构：
[He X.] School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan Changqing Park, Southern Rd. 68, Wuhan, 430023, China;[Leng X.L.] Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China;[Zhou H.] School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan Changqing Park, Southern Rd. 68, Wuhan, 430023, China<&wdkj&>Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China
会议名称：
11th Conference of Asian Rock Mechanics Society, ARMS 2021
期刊：
Journal of Physics: Conference Series,2019年1324(1):012078 ISSN：1742-6588
通讯作者：
Liu, Jianjun
作者机构：
[Liu, Jianjun; He, Xiang; Wang, Rui] Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.;[Liu, Jianjun] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Engn, Wuhan 430071, Peoples R China.;[Zhang, Bohu] Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China.;[Zu, Lin] Daqing Oilfield Co, Res Inst Petr Explorat & Dev, Daqing 163400, Peoples R China.
通讯机构：
[Liu, Jianjun] W;[Liu, Jianjun] C;Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.;Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Engn, Wuhan 430071, Peoples R China.
会议名称：
2nd International Conference on Physics, Mathematics and Statistics (ICPMS)
会议时间：
MAY 22-24, 2019
会议地点：
Hangzhou, PEOPLES R CHINA
会议主办单位：
[Liu, Jianjun;Wang, Rui;He, Xiang] Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.^[Liu, Jianjun] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Engn, Wuhan 430071, Peoples R China.^[Zhang, Bohu] Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China.^[Zu, Lin] Daqing Oilfield Co, Res Inst Petr Explorat & Dev, Daqing 163400, Peoples R China.
会议论文集名称：
Journal of Physics Conference Series
摘要：
<jats:title>Abstract</jats:title>
<jats:p>Rock pore is the storage space and migration channel of geo-fluid resource like petroleum, coalbed methane and shale gas etc. In this paper, the rock core microscopic pore structure based on CT image is studied through image processing. Then the parameters are analyzed statistically by numerical modelling. The reconstructed software Mimics is used to reconstruct the core structural model. Finally, the relationship between the pore structure parameters and penetrability is studied by numerical simulation. The equivalent permeability of the reconstructed core is calculated by using FEM software Abaqus. The results shown that fluid percolation is directly related with porosity, pore shape, pore conectivity. The permeability of core can be obtained by substituting flow numerical simulation for seepage laboratory experiment.</jats:p>
作者机构：
State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, SouthWest Petroleum University, Chengdu, China;School of Geoscience and Technology, SouthWest Petroleum University, Chengdu, China;[He X.] School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, China;[Wang B.] School of Computer Science, SouthWest Petroleum University, Chengdu, China;[Wang Y.; Liu J.] State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, SouthWest Petroleum University, Chengdu, China<&wdkj&>School of Geoscience and Technology, SouthWest Petroleum University, Chengdu, China
通讯机构：
[Yingjie Wang] S;State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, SouthWest Petroleum University, Chengdu, China<&wdkj&>School of Geoscience and Technology, SouthWest Petroleum University, Chengdu, China
关键词：
Computer technology and application;Database system;Rock salt gas storage;SQL Server
关键词：
Concretes;Polymers;Portland cement;Scanning electron microscopy;Sulfur compounds;Concrete samples;Durability of concretes;Fineness modulus;Modification mechanism;Modified concrete;Ordinary concretes;Superabsorbent polymer;Water/cement ratio;Concrete additives
摘要：
A study presented findings on the behavior of ordinary concrete against superabsorbent polymers (SAPs) SAPs-modified concrete. Specimens were evaluated for resistance to freeze-thaw, shrinkage, and sulfate attack. Scanning electron microscopy (SEM) was utilized to investigate the modification mechanism. The cement used to prepare concrete samples was No. 42.5 Portland cement. The fine aggregate was a medium-coarse sand with a fineness modulus of 2.7 and a density of 1.57 × 103 kg/m3, in accordance with the specifications of JGJ 52-199. Tap water was utilized for all concrete samples. A base water/cement ratio of 0.4 was used to prepare specimens that incorporated 0.0, 0.1, 0.3, 0.5, 0.7, and 0.9% of the SAPs as concrete additives.
