Japanese Geotechnical Society Special Publication最新文献_第5页

Effect of polymer elution on interface shear strength between bentonite-polymer composite geosynthetic clay liners and geomembranes 聚合物洗脱对膨润土-聚合物复合土工合成粘土衬垫与土工膜界面抗剪强度的影响

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg033

Jiannan Chen, S. Gustitus, C. Benson

引用次数: 2

Compatibility of Landfill Leachate with Compacted Biocemented Lateritic Soil Through Microbial Induced Calcite Precipitation Technique 利用微生物诱导方解石沉淀技术研究垃圾渗滤液与生物胶结红土的相容性

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg049

Kolawole J Kolawole, Gadzama W Emmanuel, A. Eberemu, T. S. Ijimdiya

{"title":"Compatibility of Landfill Leachate with Compacted Biocemented Lateritic Soil Through Microbial Induced Calcite Precipitation Technique","authors":"Kolawole J Kolawole, Gadzama W Emmanuel, A. Eberemu, T. S. Ijimdiya","doi":"10.3208/jgssp.v09.cpeg049","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg049","url":null,"abstract":"A new soil improvement method known as microbial induced calcite precipitation (MICP) has received tremendous attention of researchers in the related fields. This paper reports the results of the compatibility of compacted bio-cemented lateritic soil with municipal solid waste (MSW) leachate. Lateritic soil was treated with Sporosarcina pasteurii (S. pasteurii) suspension densities up to 2.40 x 10 cells/ml and compacted using British Standard light, BSL (or standard Proctor) energy. The permeation with leachate only yielded minimum hydraulic conductivity values of 5.02 x 10 m/s for the natural soil and 5.78 x 10 m/s for specimen treated with S. pasteurii suspension density of 2.40 x 10 cells/ml. The micrographs of specimens treated with S. pasteurii suspension density of 2.40 x 10 cells/ml and permeated with leachate only depicted the development of bio-film when compared with micrograph of the untreated soil. Test results showed significant reduction in the concentration of the MSW leachate chemical specie considered after interaction with S. pasteurii for 150 days either through bio-transformation or bio-degradation process.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125001981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of fines content and maximum particle size on mechanical properties and saturated hydraulic conductivity of recycled concrete aggregates for unbound roadbed materials in Vietnam 细粒含量和最大粒径对越南无粘结路基材料再生混凝土骨料的机械性能和饱和水导率的影响

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg116

Hong Nam Thai, Akira Kato, Hoang Giang Nguyen, Tien Nguyen, Ton Kien Tong, Van Tuan Nguyen, T. Uchimura, T. Maki, K. Kawamoto

{"title":"Effects of fines content and maximum particle size on mechanical properties and saturated hydraulic conductivity of recycled concrete aggregates for unbound roadbed materials in Vietnam","authors":"Hong Nam Thai, Akira Kato, Hoang Giang Nguyen, Tien Nguyen, Ton Kien Tong, Van Tuan Nguyen, T. Uchimura, T. Maki, K. Kawamoto","doi":"10.3208/jgssp.v09.cpeg116","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg116","url":null,"abstract":"Road base layers play an important role in bearing, transmitting, and distributing part of the load to the underground. Unbound aggregates crushed from natural rock are the most popular materials used to construct the base layers of the pavements. However, nowadays the sources of natural materials have been increasingly exhausted and the pollution from construction and demolition waste (CDW) is a big problem in Vietnam. Therefore, the utilization of CDW for recycling is a crucial issue to reduce the generation amount of CDW and consumption of natural resources. With regards to the applicability of recycled concrete aggregates (RCA) to unbound roadbed materials, many studies have been done to investigate the effect of grading of particles on mechanical properties. However, the effect of other factors such as maximum particle size (Dmax) and fines content (Fc in wt.%; typically, with particle size less than 0.075 mm) have not been fully understood. In this study, concrete waste taken from a CDW landfill in Vietnam and was crushed and sieved to prepare graded RCA samples for a series of laboratory tests to characterize mechanical properties such as compaction, bearing capacity, and saturated hydraulic conductivity. The graded RCA samples with two different Dmax, 25 and 37.5 mm, and four different Fc values ranging from 0 to 20 %, were prepared. This study showed that maximum dry density (MDD) and CBR value of graded aggregates with Dmax = 25 and 37.5 mm reached the highest values at Fc = 5%. Except for the sample with Fc = 20 % and Dmax = 25 mm, the measured CBR values of tested samples satisfied the technical requirements of Vietnamese and Japanese standards. Besides, the particle breakage of aggregates and saturated hydraulic conductivity were highly controlled by Fc and both values decreased with increasing in Fc.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125379984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Thermo-osmosis in silica nanochannels 二氧化硅纳米通道中的热渗透作用

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg150

Weiqiang Chen, M. Sedighi, A. Jivkov

引用次数: 3

Cyclic behavior of bio-cemented soils using relatively large grains 大颗粒生物胶结土的循环特性

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg147

Tong Yu, H. Souli, Y. Péchaud, J. Fleureau

{"title":"Cyclic behavior of bio-cemented soils using relatively large grains","authors":"Tong Yu, H. Souli, Y. Péchaud, J. Fleureau","doi":"10.3208/jgssp.v09.cpeg147","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg147","url":null,"abstract":"Consequences of liquefaction during earthquakes can be disastrous and fatal. During the past decade, bio-mediated methods have gained researchers and engineers' attention, and have been developed to strengthen soils and mitigate liquefaction. Among these methods, a commonly used method ― the microbial induced calcite precipitation (MICP) method ― has proved to be a potential alternative technique due to its sustainability and relatively environmentally friendly character, with lower carbon emissions compared to traditional methods. In most of the existing studies on cyclic behavior of MICP-treated soils, uniformly graded fine sands like Ottawa 50-70, with a maximum diameter of 1 mm and a narrow grain size distribution, were used. As liquefaction can also occur in soils with larger grain size, it is quite important to study the applicability of MICP method to these soils and to know their behavior after treatment. In this study, we used coarser soils with a maximum grain size of 5 mm. Undrained cyclic triaxial tests were applied to MICP-treated and untreated soils. Cyclic stress ratios (CSR) and number of cycles from 0.25 (300 cycles) to 0.3 (100 cycles), 0.35 (100 cycles), 0.4 (100 cycles), up to 0.5 were applied one after another as long as liquefaction did not occur. The results obtained on one of these soils showed that the untreated soil samples liquefied at a CSR equal to 0.25 after 42 cycles, with an axial deformation around ± 4 %. For the MICP-treated samples with 8.6 % calcium carbonate content, cyclic resistance increased slightly to 63 cycles at 0.25 CSR, while the axial deformation was in one direction and relatively lower rate of increment. With around 3 % more calcium carbonate content (11.5 %), the MICP-treated soil was like cement which could withstand a much higher cyclic stress ratio (up to 0.5) with many more cycles compared to the untreated soil.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"490 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124428994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A biochemical-thermo-hydro-mechanical coupling of degradable soils 可降解土壤的生物化学-热-水-机械耦合

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg050

Li Ke, X. Wenjie, Chen Yunmin

{"title":"A biochemical-thermo-hydro-mechanical coupling of degradable soils","authors":"Li Ke, X. Wenjie, Chen Yunmin","doi":"10.3208/jgssp.v09.cpeg050","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg050","url":null,"abstract":"A general framework of coupled biochemical-thermo-hydro-mechanical (THMBC) processes has been developed to analyze the complex phenomena in degradable soils, such as municipal solid and natural gas hydrate, whose solid skeleton can be decomposed by biological or chemical reactions. The frame contains the linear momentum equilibrium equation, the mass conservation equations for the liquid and gas phases, the energy conservation equation. The evaporation and condensation of water, and the dissolution of gas in water are considered in the mass conservation equation of the fluid. The biochemical reaction rate can be used to link the source and sink terms of the fluid with solid mass loss, meanwhile to give a quantitative description of changes in porosity and strain. The impact of the solid mass loss and the porosity change on the hydro-mechanical properties are involved. As a case study, a model describing the coupling process of landfilled MSW was proposed. In this model, the constitutive model considering the influence of degradation was used, and the degradation chemical formula of the degradable component was given. The results of CAR1 experiment were compared with numerical simulations.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"705 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116121065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contribution of immobilization material for arsenic immobilization in excavated rock with different particle size 不同粒径开挖岩体中固定物质对砷固定的贡献

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg146

N. Manabe, M. Katoh

{"title":"Contribution of immobilization material for arsenic immobilization in excavated rock with different particle size","authors":"N. Manabe, M. Katoh","doi":"10.3208/jgssp.v09.cpeg146","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg146","url":null,"abstract":"Excavated rock and sediment in which arsenic release naturally occurs is necessary to be treated with an appropriate technique such as chemical immobilization. The physical condition such as particle size ratio of rock to the immobilization material possibly enhances/suppresses the effects of arsenic immobilization because arsenic should be contacted and reacted with the immobilization material in the rock pores for the immobilization. This study prepared the up-flow column percolation test using the excavated rocks with the different particle sizes and immobilization material with constant particle size to determine a suitable ratio of the diameter of the average particle size in the rock samples to that in the immobilization material. The column percolation test showed that the contribution of arsenic immobilization by the immobilization material was higher in the larger particle size of excavated rock while the arsenic retention capacity of excavated rock was high in the smaller particle size. The arsenic concentrations in the leaching water were the lowest and the percentage of arsenic retained during the column percolation test was the highest in the particle size of 1.0–2.0 mm of excavated rock. Based on these results, this study suggests that the suitable particle size ratio of excavated rock to the immobilization material was 2 to 10.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122914260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the influence of chemico-osmosis on solute transport in bentonite membranes based on combined phenomenological and physical modeling 基于现象学和物理模型的化学渗透对膨润土膜中溶质迁移的影响评估

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg023

M. Malusis, A. Dominijanni, J. Scalia, N. Guarena, K. Sample-Lord, G. Bohnhoff, C. Shackelford, M. Manassero

{"title":"Assessing the influence of chemico-osmosis on solute transport in bentonite membranes based on combined phenomenological and physical modeling","authors":"M. Malusis, A. Dominijanni, J. Scalia, N. Guarena, K. Sample-Lord, G. Bohnhoff, C. Shackelford, M. Manassero","doi":"10.3208/jgssp.v09.cpeg023","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg023","url":null,"abstract":"The ability of bentonite-based barriers to act as semipermeable membranes that inhibit the passage of solutes (ions) is well documented. This behavior induces chemico-osmotic liquid flux that can improve the performance of such barriers by reducing solute mass flux. This paper explores the potential significance of chemico-osmosis on solute transport through bentonite membranes using a phenomenological transport framework combined with a physical model relating the macroscale transport properties (membrane efficiency coefficient,  , and hydraulic conductivity, k h ) to the microscale physicochemical and fabric properties of the bentonite. The model was used to simulate the coupled transport of monovalent salt (KCl) through a geosynthetic clay liner. The results indicate that the influence of chemico-osmosis is dependent upon the void ratio of the bentonite and the extent to which clay platelets are aggregated to form tactoids. Chemico-osmosis is predicted to have an increasingly more significant impact on solute transport with increasing source concentration ( C s0 ), despite decreasing  with increasing C","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128803096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Application of natural and enhanced natural attenuation of heavy metals in soils and sediments 重金属在土壤和沉积物中自然和增强自然衰减的应用

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg101

C. Mulligan, Masoumeh Javid

{"title":"Application of natural and enhanced natural attenuation of heavy metals in soils and sediments","authors":"C. Mulligan, Masoumeh Javid","doi":"10.3208/jgssp.v09.cpeg101","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg101","url":null,"abstract":"Various techniques can be considered for the remediation of contaminated sediments. The options can include capping, dredging, or physical, biological, and/or chemical treatments and natural recovery. Natural recovery could be beneficial over dredging due to a reduction in costs and lack of solid disposal requirements. Source control, however, is a major issue for sustainable remediation. In a case study, surface and core sediment samples were collected from a harbor on the north bank of the St. Lawrence River in the province of Quebec to assess heavy metal pollution and determine if natural recovery was occurring. Comparing the results of all analysis done for sediment for three different years (2015, 2017 and 2019) in the sampling area, it can be seen that some metals increased, some decreased and some of them showed nearly the same level of contamination. The results also indicated that during the sampling periods, copper, zinc and chromium were the main elements that exceeded the occasional effect level based on the Environment Canada sediment quality guidelines. Therefore, metal pollution has become a noticeable problem in this area and natural recovery was not achieved for several metals due to ongoing contamination and thus source control is critical.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128477133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of coupling hydro-mechanical–biodegradation process on the slope stability of a bioreactor landfill 水-机械-生物降解耦合过程对生物反应器填埋场边坡稳定性的影响

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg053

Shijin Feng, Wen-Ding Fu, Q. Zheng, Shi-Feng Lu

{"title":"Effect of coupling hydro-mechanical–biodegradation process on the slope stability of a bioreactor landfill","authors":"Shijin Feng, Wen-Ding Fu, Q. Zheng, Shi-Feng Lu","doi":"10.3208/jgssp.v09.cpeg053","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg053","url":null,"abstract":"In a bioreactor landfill, waste biodegradation, generation of gas and leachate, two-phase flow and mechanical deformation closely couple with each other. Recirculated leachate can accelerate waste biodegradation and generation of landfill gas. A significant mechanical deformation occurs due to biodegradation and suction change, and the increase in both gas pressure and leachate pressure could affect the slope stability due to a decrease in effective stress. In this paper, a full coupled hydro-mechanical-biodegradation (H-M-B) model is proposed to study the effect of the coupling processes in a bioreactor landfill on the slope stability, and a solver is implemented in OpenFOAM platform based on finite volume method. Considering the effect of volume change of solid waste, the spatial and temporal distributions of gas and leachate pressures are calculated by two-phase flow model and the corresponding slope stability is evaluated by the factor of safety calculated by the strength reduction technique method. The results characterize the effect of waste biodegradation, gas recovery and leachate recirculation on the mechanical deformation and slope stability of a bioreactor landfill, which will benefit to its design and decision-making.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122150794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0