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Mechanical properties of geomaterials made of steelmaking slag mixed with fibrous wood chips or chemical fibers 炼钢渣与纤维木屑或化学纤维混合制成土工材料的力学性能
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg032
A. Oshino, Y. Kikuchi, S. Noda, Tomotaka Yoshikawa, Taiki Sugihara, Tomotaka Watanabe
{"title":"Mechanical properties of geomaterials made of steelmaking slag mixed with fibrous wood chips or chemical fibers","authors":"A. Oshino, Y. Kikuchi, S. Noda, Tomotaka Yoshikawa, Taiki Sugihara, Tomotaka Watanabe","doi":"10.3208/jgssp.v09.cpeg032","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg032","url":null,"abstract":"The purpose of this study is to investigate the effect of the length of the chemical fibers (CF) on the mechanical properties of slag mixed with CF. Furthermore, the effect of the difference between fibrous wood chips (FWC) and CF on mechanical properties is to be examined. In this study, a series of consolidated drained triaxial compression tests were conducted on a material mixed with steelmaking slag and FWC assuming under sieve residue or CF. The chemical fiber length and curing periods were changed in this study. As a result, it was found that 2% by volume of the CF mixture increased both the shear strength and the residual strength compared to the slag. However, their increases were up to the fiber length of 20 mm. When 5% by volume of FWC, the length of which was about 18.9 mm, were mixed to the slag, there were no increases observed in both the shear strength and the residual strength.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"25 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":"130769164","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
Beneficial use of Savannah River dredged material in large-scale geotechnical applications 萨凡纳河疏浚材料在大规模岩土工程应用中的有益应用
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg064
Hejintao Huang, S. Burns, K. Kurtis
{"title":"Beneficial use of Savannah River dredged material in large-scale geotechnical applications","authors":"Hejintao Huang, S. Burns, K. Kurtis","doi":"10.3208/jgssp.v09.cpeg064","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg064","url":null,"abstract":"The Port of Savannah is located 18 miles inland from the Atlantic Ocean in the southeastern United States. Historically, 6 million cubic meters of river sediment is dredged from the Savannah River each year; however, the Savannah Harbor Expansion Project (SHEP) (Georgia, USA), which is proposed to accommodate post Panamax ships in the channel, will result in further increased dredge volume for disposal. Because dredge materials are currently disposed on land, this study was focused on identifying possible beneficial uses of dredge material in order to reduce the requirements for land disposal. A laboratory-based study was performed to assess the feasibility of large volume geotechnical use options for dredged sediments. Four samples were collected from the disposal facilities and characterized using physical, chemical and morphological analysis techniques, including grain size distribution, Atterberg limits test, specific gravity, scanning electron microscopy (SEM), laser diffraction particle size analysis (PSA), total organic carbon content (TOC), loss on ignition (LOI), and thermogravimetric analysis (TGA) analysis. The compactibility of the dredge was quantified using the standard Proctor test. Overall, characterization and compaction results demonstrated that the dredge material is viable for use as a nonstructural fill material, indicating that additional research and feasibility studies focused on specific beneficial use options is warranted. These results have important implications on the potential for beneficial use of the dredged sediment.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"31 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":"131756690","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
Post-wildfire soil and aquifer contamination: A review 野火后土壤和含水层污染:综述
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg004
Z. Ghahremani, Pierrette Iradukunda, Arvin M. Farid
{"title":"Post-wildfire soil and aquifer contamination: A review","authors":"Z. Ghahremani, Pierrette Iradukunda, Arvin M. Farid","doi":"10.3208/jgssp.v09.cpeg004","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg004","url":null,"abstract":"The need to understand the effects of wildfire and post-fire contamination of soil and groundwater has grown as a result of the expansion of the extent and severity of wildfires around the world. In addition to their direct hazards, wildfires can also contribute to human and environmental health concerns due to secondary contamination, e.g., wildfire suppression such as aqueous film-forming foams (AFFF) can release perand polyfluoroalkyl substances (PFAS) into the soil, which are very mobile, toxic, and persistent. Both direct seepage through the topsoil and biotransformation of fluorotelomers (FTs) determine the fate of PFAS in soils and aquifers. Research has indicated that phase partitioning behavior, such as sorption to soils and sediments, controls the fate and transport of chemicals in the environment According to various studies, the main soil or sediment characteristics that control PFAS’ sorption behavior include organic carbon (OC), pH, index cations, and ionic strength. However, neither OC, pH, nor claycontent alone could explain the sorption behavior of PFAS. More research is needed to help to understand the role of co-contaminants on the sorption behavior of PFAS, the role of surface charge on the sorption of PFAS, and on a wider range of PFAS chain compounds in the future. This paper aims to review the fate and transport of PFAS and identify the areas of research need.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"58 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":"124034198","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
Bio-mediated improvement process in a reinforced soil with waste paper fiber 废纸纤维加固土的生物介导改良工艺
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg067
H. Matsubara
{"title":"Bio-mediated improvement process in a reinforced soil with waste paper fiber","authors":"H. Matsubara","doi":"10.3208/jgssp.v09.cpeg067","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg067","url":null,"abstract":"The effectiveness of using some natural and/or synthetic fibers such as bamboo, jute, steel fibers, polyester fibers, etc. in the soil improvement techniques has been recognized by many researchers. In addition, eco-friendly soil improvement techniques using biomineralization by microorganisms have attracted attention in recent years. This technique improves the mechanical properties of soil by precipitating calcium carbonate between soil particles and adhering the particles. In the current study, the author investigated an effectiveness of using waste paper fiber to suppress liquefaction and a self-healing process based biomineralization by microorganisms. As a result of solidification tests based on column approach, it was revealed that many calcium carbonate minerals are generated on the surface of waste paper fibers and between sand particles, and uniaxial strength is improved.","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":"129241299","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: 3
Optimal design of ZVI/lapillus mixtures for nickel removal in permeable reactive barriers ZVI/lapillus混合物在渗透反应屏障中除镍的优化设计
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg022
S. Bilardi, P. Calabrò, N. Moraci
{"title":"Optimal design of ZVI/lapillus mixtures for nickel removal in permeable reactive barriers","authors":"S. Bilardi, P. Calabrò, N. Moraci","doi":"10.3208/jgssp.v09.cpeg022","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg022","url":null,"abstract":"The remediation of contaminated groundwater, through the technology of permeable reactive barriers (PRB), involves the use of a reactive medium able to reduce the concentration of contaminants as long as remediation targets are achieved. In the present study, the use of granular mixtures composed of zero valent iron (ZVI) and lapillus for the treatment of nickel contaminated groundwater is proposed. Through short and long term column experiments, the effects of the following were analysed: i) ZVI percentage per unit volume, ii) reactive medium thickness, iii) flow velocity and iv) initial nickel concentration, on the breakthrough point occurrence (point where a rapid increase in nickel concentration in the effluent is observed). The optimal mixture composition (i.e. the optimal ZVI content per unit volume) was defined when the reactive medium was able to keep its reactivity and hydraulic conductivity for the time necessary for remediation. This capacity, as shown in this study, depends on the propagation velocity of the contamination front through the reactive medium.","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":"116821623","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
Thermal diffusivity of municipal solid waste based on inverse analysis of in-situ heat extraction test 基于原位采热试验逆分析的城市生活垃圾热扩散系数研究
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg128
Leticia M. Nocko, Keaton Botelho, Jeremy W. F. Morris, Ranjiv Gupta, J. McCartney
{"title":"Thermal diffusivity of municipal solid waste based on inverse analysis of in-situ heat extraction test","authors":"Leticia M. Nocko, Keaton Botelho, Jeremy W. F. Morris, Ranjiv Gupta, J. McCartney","doi":"10.3208/jgssp.v09.cpeg128","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg128","url":null,"abstract":"In this study, a two-dimensional finite difference model was used to simulate the heat transfer occurred during a 17-day heat extraction test performed in an MSW landfill cell in Santee, California. The heat extraction was performed using serpentine horizontal heat exchangers installed 6 m above the base liner of the cell, and it started after the waste reached a stable temperature value of 52 °C. The model was developed based on the differential heat conduction equation and an inverse analysis was performed to estimate the thermal diffusivity of the waste. The values of in-situ thermal diffusivity obtained ranged from 7.85  10 -7 m 2 /s to 1.05  10 -6 m 2 /s and are consistent with the higher range of values presented in the literature","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"162 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":"115714736","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
Multi-physics simulation for predicting the permeability change of single rock fracture due to geochemical effect depending on pH condition 地球化学效应对单个岩石裂缝渗透率随pH值变化的多物理场模拟
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg045
S. Ogata, H. Yasuhara, N. Kinoshita, T. Kumagai, T. Inui, Seiki Mishima, Kiyoshi Kishida
{"title":"Multi-physics simulation for predicting the permeability change of single rock fracture due to geochemical effect depending on pH condition","authors":"S. Ogata, H. Yasuhara, N. Kinoshita, T. Kumagai, T. Inui, Seiki Mishima, Kiyoshi Kishida","doi":"10.3208/jgssp.v09.cpeg045","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg045","url":null,"abstract":"A multi-physics simulator, with geochemical reactions that depend on the pH condition, was proposed. The simulator was validated by replicating the measurements of the evolving permeability and the solute concentrations in a single rock fracture obtained from flow-through experiments under different pH conditions. Then, the changes in fracture permeability during the virtual long-term flow-through tests were predicted by assuming the permeant under various pH, stress, and temperature conditions. The predicted results show that the rate of permeability reduction under a pH of 11 was about 10 times faster than that under a pH of 7.0, and the impact of the pH condition was confirmed.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"414 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":"116136437","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
Estimation of geotechnical properties of municipal solid waste by field method 用现场法估计城市生活垃圾的岩土特性
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg051
V. Ofrikhter, I. Ofrikhter, M. Bezgodov
{"title":"Estimation of geotechnical properties of municipal solid waste by field method","authors":"V. Ofrikhter, I. Ofrikhter, M. Bezgodov","doi":"10.3208/jgssp.v09.cpeg051","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg051","url":null,"abstract":"As biodegradation proceeds, municipal solid wastes (MSW) acquire pronounced soil-like properties and upon completion of the process can be used as the foundation. The solid waste massif is an inhomogeneous soil-like mass which requires non-destructive and minimally invasive methods of research. The cone penetration testing of MSW by piezocone (CPTU) in combination with the multichannel analysis of surface waves (MASW) provide extensive data about physico-mechanical properties of wastes, which are usually unavailable in traditional approaches and which can be directly used in geotechnical stability calculations of the waste massif.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"19 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":"127420351","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
Probabilistic analysis of contaminant transport in fractured sedimentary rocks 裂缝性沉积岩中污染物输运的概率分析
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg109
G. K, S. G. L.
{"title":"Probabilistic analysis of contaminant transport in fractured sedimentary rocks","authors":"G. K, S. G. L.","doi":"10.3208/jgssp.v09.cpeg109","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg109","url":null,"abstract":"Understanding the flow and contaminant transport process in rocks has received increased attention in the past two decades as these geological formations serve as potential sites to contain different types of wastes in geological repositories. In this paper, a discrete fracture network model is developed to understand the process of contaminant transport in a fractured rock mass. This model integrates a stochastic fracture generating algorithm for sedimentary rocks and a two-dimensional numerical model that simulates the flow and transport of a contaminant through the heterogeneous system of fractures. Further, the uncertainty in geological and transport properties of the contaminant are considered as random variables. The probability of concentration exceeding the permissible value at the endpoint is quantified by carrying out reliability analysis using the subset simulation method. The probabilistic framework developed in this study helps assess the behaviour of contaminant migrating through a complex heterogeneous system and provides a basis for gaining a level of confidence in the model results.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"3 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":"126156895","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
Characterization of hydrophobicity for artificially hydrophobized autoclave aerated concrete grains 人工疏水蒸压加气混凝土颗粒的疏水性表征
Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg124
Zafar Muhammad Junaid, Akihiro Matsuno, Takeshi Saito, Huyen Thi-Thanh Dang, Pham Thanh Huyen, Ken Kawamoto
{"title":"Characterization of hydrophobicity for artificially hydrophobized autoclave aerated concrete grains","authors":"Zafar Muhammad Junaid, Akihiro Matsuno, Takeshi Saito, Huyen Thi-Thanh Dang, Pham Thanh Huyen, Ken Kawamoto","doi":"10.3208/jgssp.v09.cpeg124","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg124","url":null,"abstract":"","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"369 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":"122769680","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
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