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Ecological flexible protection method of expansive soil slopes under rainfall Environ. Geotech. (IF 2.2) Pub Date : 2024-04-19 Yingzi Xu, Chunyan Yang, Chao Su, Zhen Huang, Xuhang Liao, Linqiang Tang
In this study, a new ecological slope protection method – anchor-reinforced vegetation system (ARVS) – was applied to a newly excavated expansive soil slope. To explore the effect and mechanism of ARVS protection of newly excavated expansive soil slopes, expansive soil slopes with three different protection methods (bare slopes, grassed slopes and ARVS slopes) were built. Continuous natural rainfall
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Briefing: Intensive inland aquaculture ponds: challenges and research opportunities Environ. Geotech. (IF 2.2) Pub Date : 2024-03-20 T Vamsi Nagaraju, B M Sunil
This briefing presents an overview of inland aquaculture scenario that focuses on challenges of aquaculture farming, contaminant transport and the future of aqua farming in a broader perspective of environmental geotechnics. Un-engineered aquaculture practices are a cause of concern, and special attention is necessary in waste water management, cross-contamination with the adjacent environment, sludge–subsoil
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Effects of net-zero produced water strategy on gas production and sediment deformation in marine gas hydrate reservoirs Environ. Geotech. (IF 2.2) Pub Date : 2024-03-09 Shuman Yu, Shun Uchida
Gas hydrates, commonly found in deep marine sediments, have been considered a potential long-term energy source. Recent field trials demonstrated that well depressurisation, converting solid gas hydrates into fluid in-situ, is the most efficient method for gas production. However, this process involves continuously pumping a large volume of water from the ocean that cannot be simply disposed of due
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Sustainability challenges of clean-energy critical minerals: copper and rare earths Environ. Geotech. (IF 2.2) Pub Date : 2024-02-02 Evan K Paleologos, Abdel-Mohsen O Mohamed, Devendra N Singh, Brendan C O’Kelly, Maisa El Gamal, Ameera Mohammad, Prithvendra Singh, Venkata S N S Goli, António J Roque, Joy A Oke, Hossam Aboel-Naga, Eng-Choon Leong
The transition to a clean-energy economy in an effort to mitigate climate change has brought a need for intense mining exploration of a critical class of minerals, previously mined and used at a fraction of what is required today and for the upcoming decades. For some common metals, such as copper, major deficits are forecasted for 2030, and for some less common ones, such as rare earths, mined quantities
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Damage constitutive model of fly ash–cementitious iron tailings powder under small strain Environ. Geotech. (IF 2.2) Pub Date : 2024-01-08 Na Li, Wei-ying Xu, Ping Jiang, Shao-wei Lv, Xian-wen Huang
With the vigorous development of industrial economy, the production capacity and level have been significantly improved, but at the same time, a large amount of iron tailings, fly ash and a series of bulk solid waste materials have been accumulated. These industrial wastes have caused serious impact on the ecological environment. How to deal with them effectively is an urgent problem that needs to
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Degradation of urban soil quality due to air and road traffic: relevant info and research Environ. Geotech. (IF 2.2) Pub Date : 2023-12-28 Celeste Jorge
Aircraft operations at an airport result in the emission of various substances. Simultaneously, in an airport area, road traffic is very intense, also contributing to the emission of the same substances. In this work, potentially toxic elements, essentially trace metals, and others not categorised as such (alloys elements and ceramic particles that constitute particulate matter) are considered, which
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Dry shrinkage cracking and permeability of biopolymer-modified clay under dry–wet cycles Environ. Geotech. (IF 2.2) Pub Date : 2023-11-08 Yangyang Cai, Yong Wan, Xingxing He, Zhixiang Chen, Lei Liu, Jiangshan Li
Biopolymers efficiently improve the anti-seepage function of compacted clay layers, but research concerning the permeability stability of biopolymer-modified clay during cyclic wetting and drying is scarce. In this paper, the macro–microstructures and the permeability coefficients of biopolymer-modified clay and conventional bentonite-modified clay under dry–wet cycles are comparatively studied. The
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Experimental investigation of gas migration behaviour in unsaturated sand–clay mixtures Environ. Geotech. (IF 2.2) Pub Date : 2023-11-08 Kangjian Zhang, Zhiqiang Zhang, Yuxi Li, Zhechuan Hu
Understanding gas migration behaviours in unsaturated sand–clay mixtures is of great importance to design and construction involving applications of shield-cutting-tool replacement using pressure. A gas permeability test apparatus for unsaturated soil was upgraded to investigate gas migration behaviours further. A series of gas, liquid and solid three-phase coupling gas injection tests were performed
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Sorption and economic viability of peat, compost and biochar for zinc-contaminated site Environ. Geotech. (IF 2.2) Pub Date : 2023-10-26 Jacqueline Zanin Lima, Eduardo Anselmo Ferreira da Silva, Valéria Guimarães Silvestre Rodrigues
The growing demand for low-cost sorbents, which guarantee eco-efficiency in removing contaminants, has led to numerous studies in recent decades. In this sense, sorbents derived from organic residues have shown promising options; however, the organic fraction of municipal solid waste (OFMSW) has received little attention to date. This study compares the zinc (Zn) sorption performance of a traditional
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Dynamic properties of high-density polyethylene–sand by large-scale direct shear experiments Environ. Geotech. (IF 2.2) Pub Date : 2023-10-20 Mahyar Arabani, Masoomeh Khodabakhshi
Recycling and reuse of plastic waste in civil projects is one way to reduce its negative impacts on the environment. High-density polyethylene (HDPE) is a highly abundant plastic waste found widely and in high volumes worldwide. Although sand has a relatively high frictional resistance, if its dynamic parameters are improved, it can be used in geotechnical projects that require higher dynamic parameters
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A simplified methodology for determining the thermal performance of thermo-active piles Environ. Geotech. (IF 2.2) Pub Date : 2023-10-16 Ryan Yin Wai Liu, David M G Taborda
Ground source energy systems provide low carbon dioxide heating and cooling to buildings, but their efficient deployment requires a reliable estimate of their thermal performance. A simplified methodology is presented to determine the thermal performance of thermo-active piles when heating or cooling loads are specified with either inlet pipe temperatures or imposed heat fluxes. The proposed methodology
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Dry shrinkage cracking and permeability of biopolymer-modified clay under dry-wet cycles Environ. Geotech. (IF 2.2) Pub Date : 2023-10-11 Yangyang Cai, Yong Wan, Xingxing He, Zhixiang Chen, Lei Liu, Jiangshan Li
Biopolymer efficiently improves the anti-seepage function of compacted clay layer, but research concerning the permeability stability of biopolymer-modified clay during cyclic wetting and drying is scarce. In this paper, the macro-micro structure and the permeability coefficient of biopolymer-modified clay and conventional bentonite-modified clay under the dry-wet cycles are comparatively studied.
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Temperature-dependent relationship between soil water content and electrical conductivity Environ. Geotech. (IF 2.2) Pub Date : 2023-10-04 Zhixiang Chen, Huayue Yu, Yong Wan, Xingxing He, Longfei Hua
Water content is a fundamental parameter for analysing soil composition and engineering behaviour. However, conceptual water content sensors cannot be used in high-temperature and high-pressure environments. To assess the suitability of using electrical conductivity (EC) as a predictor of soil water content at high temperatures, a series of EC and water content tests of clay and sand is conducted.
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Bio-cementation of tailings sands using ultraviolet-induced urease-producing bacteria Environ. Geotech. (IF 2.2) Pub Date : 2023-10-04 Kai Xu, Ming Huang, Jinxuan Zhang, Mingjuan Cui, Chaoshui Xu
The disposal of tailings in a safe and environmentally friendly manner has always been a challenging issue. The microbially induced carbonate precipitation (MICP) technique is used to stabilise tailings sands. MICP is an innovative soil stabilisation technology. However, its field application in tailings sands is limited due to the poor adaptability of non-native urease-producing bacteria (UPB) in
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An assessment of a simplified methodology for determining the thermal performance of thermo-active piles Environ. Geotech. (IF 2.2) Pub Date : 2023-09-28 Ryan Yin Wai Liu, David MG Taborda
Ground source energy systems provide low-carbon heating and cooling to buildings, but their efficient deployment requires a reliable estimate of their thermal performance. A simplified methodology is presented to determine the thermal performance of thermo-active piles when heating or cooling loads are specified with either inlet pipe temperatures or imposed heat fluxes. The proposed methodology avoids
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Prediction of hydraulic conductivity of sodium bentonite GCLs by machine learning approaches Environ. Geotech. (IF 2.2) Pub Date : 2023-09-14 Dong Li, Zhenlong Jiang, Kuo Tian, Ran Ji
Six machine learning methods (linear regression, logistic regression, extreme gradient boosting (XGBoost), support vector machine, K-nearest neighbours and artificial neural network) were used to predict/classify the hydraulic conductivity of conventional sodium bentonite (Na-B) geosynthetic clay liners (GCLs) to saline solutions or leachates. Data were collected from the literature and randomly divided
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Analytical solutions for transport of organic solutes in multi-layered porous media Environ. Geotech. (IF 2.2) Pub Date : 2023-09-11 Wenhao Jiang, Shangqi Ge, Chen Feng, Jiangshan Li
In this study, analytical solutions for one-dimensional transport of organic solutes in multilayered porous media are developed using the methods of matrix transfer and variable separation, where multiple factors such as advection, diffusion, mechanical dispersion, adsorption, degradation, boundary condition type and change in concentration are systematically incorporated for the first time. Compared
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Characterisation, remediation and valorisation of contaminated sediments: a critical review Environ. Geotech. (IF 2.2) Pub Date : 2023-08-24 Prithvendra Singh, Claudia Vitone, Béatrice A Baudet, Federica Cotecchia, Michele Notarnicola, Michael Plötze, Alexander M Puzrin, Venkata Siva Naga Sai Goli, Matilda Mali, Rosella Petti, Francesca Sollecito, Francesco Todaro, Abdulla Muththalib, Arif Mohammad, Mrunal S Bokade, Devendra Narain Singh
The constraints associated with the availability of huge amounts of natural resources for infrastructure and agricultural development call for the reuse and recycling of anthropogenically created geomaterials, which is in line with the UN Sustainable Development Goals. In this context, valorisation of dredged sediments (DSs), obtained from water bodies such as rivers, lakes and oceans, as a resource
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Environmental impacts of landfills: perspectives on bio-monitoring Environ. Geotech. (IF 2.2) Pub Date : 2023-08-24 Magdalena Daria Vaverková, Evan K Paleologos, Venkata Siva Naga Sai Goli, Eugeniusz Koda, Arif Mohammad, Anna Podlasek, Jan Winkler, Aleksandra Jakimiuk, Martin Černý, Devendra Narain Singh
Environmental regulations on landfills contain detailed instructions for monitoring the impacts of pollution from leachate on water, air and soil. However, references to the impact of landfills on the landscape and the need to monitor the surrounding vegetation are described only in general terms. Studies have indicated that near-surface pollution events, which are not necessarily captured by existing
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Real-time monitoring of pH and dissolved oxygen during disturbances in polluted sediments Environ. Geotech. (IF 2.2) Pub Date : 2023-08-11 Christian Totland, Caroline Berge Hansen, Anita Whitlock Nybakk, Espen Eek
Remediation activities in polluted sediments, such as dredging and capping, induce the risk of transporting polluted sediments into the water column. Turbidity surveillance is the common method for in situ environmental monitoring during such activities. However, at various stages of the remediation process, the turbidity may be caused by either clean or polluted materials. Here, the potential of using
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Mechanical damage of geotextiles induced by recycled construction and demolition waste Environ. Geotech. (IF 2.2) Pub Date : 2023-06-27 José Ricardo Carneiro, Filipe Almeida, Maria de Lurdes Lopes
Construction and demolition waste is one of the most impactful waste streams worldwide, making finding applications allowing its recovery a priority. The use of recycled aggregates from construction and demolition waste as filling materials in geotechnical works, where they may come into contact with geosynthetics, is one of those applications. This work evaluates the mechanical damage induced to five
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The role of hydraulic and thermal properties of soil in evaporation: a numerical insight Environ. Geotech. (IF 2.2) Pub Date : 2023-06-27 Giulia Guida, Vincenzo Sergio Vespo, Guido Musso, Gabriele Della Vecchia
Evaporation from geological formations results from the interaction between the geomaterial and the atmosphere. Geotechnical engineering issues, such as slope stability, pollution containment and soil heave/shrinkage, require a deep understanding of the soil–atmosphere interaction ruled by evaporation. Evaporation is a multiphase thermo-hydraulic phenomenon that includes liquid water, vapour and heat
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Attenuation of erythromycin-laden waste water using the constructed wetland technique Environ. Geotech. (IF 2.2) Pub Date : 2023-06-26 Avishek Adhikary, Tapabrata Chakraborty, Pradyumna Konar, Supriya Pal, Sudipta Ghosh
Erythromycin (ERY) is environmentally resilient because of its aromatic nature, which hinders degradation. In the present study, silty–sandy soil, with a saturated hydraulic conductivity (K) value of 1.66 × 10−7 m/s, was studied for its potential to remove aqueous ERY using a laboratory-scale constructed wetland. With a dose of 10 g/l, a concentration of 25 mg/l and a contact time of 30 min, the maximum
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Mechanical behaviour of soil under drying–wetting cycles and vertical confining pressures Environ. Geotech. (IF 2.2) Pub Date : 2023-06-19 Zhiming Chao, Danda Shi, Gary Fowmes
A system for preparing soil specimens subjected to drying–wetting cycles while under vertical confining pressures was introduced with clayey soil specimens subjected to different drying–wetting histories, and then the relative performance was tested using consolidated undrained triaxial shear tests. Meanwhile, their soil water retention properties were also measured. The experimental results indicated
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Attenuation of Erythromycin-laden wastewater using constructed wetland technique Environ. Geotech. (IF 2.2) Pub Date : 2023-06-08 Avishek Adhikary, Tapabrata Chakraborty, Pradyumna Konar, Supriya Pal, Sudipta Ghosh
Erythromycin (ERY) is environmentally resilient because of its aromatic nature, which hinders degradation. In the present study, silty-sandy soil, having a saturated hydraulic conductivity value (K) of 1.66 × 10−7 m/s, has been studied for its potential to remove aqueous erythromycin using a laboratory-scale constructed wetland. With a dose of 10 g/l, concentration of 25 mg/l, and a contact time of
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Environmental and geotechnical properties of lightweight aggregates made of reused solid wastes Environ. Geotech. (IF 2.2) Pub Date : 2023-06-05 Daniela Dominica Porcino, Giuseppe Tomasello, Francesco Mauriello, Angela Malara
This paper presents the environmental and geotechnical characterisation of new synthetic lightweight aggregates (SLAs) composed of reused biomass fly ash and waste plastics, namely high-density and low-density polyethylene (HDPE and LDPE), with a 50:50 fly ash-to-plastic ratio by weight. One-dimensional compressibility, creep properties, compaction features and stress-strain-strength behavior of SLAs
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Investigation on thermo-mechanical response of energy piles in saturated clay Environ. Geotech. (IF 2.2) Pub Date : 2023-06-05 Xuanming Ding, Dingxin Zhang, Chenglong Wang, Gangqiang Kong, Haojie Lu
In recent years, energy piles have been widely used in the collection of shallow geothermal energy. However, the engineering characteristics of the soil and the mechanical behaviour of the pile are affected by temperature, particularly in clay. To explore the influence of heating–cooling cycles on the thermo-mechanical response of an energy pile in saturated clay, a laboratory model test was designed
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A solute transport in deformable dual-porosity media using mixture-coupling theory Environ. Geotech. (IF 2.2) Pub Date : 2023-05-16 Kai Wang, Wenjie Tan, Yanxiao Si, Yue Ma, Xiao-Hui Chen, Aizhong Ding
Rock, soil and many porous-like materials are often fractured or structured media, which can exhibit dual-porosity behaviour. Studies on solute transport in deformable dual-porosity media remain challenging due to the multi-physics coupled effects and the complex interaction between fractures (or macropores) and the porous matrix. Although several studies exist on constitutive modelling of coupled
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Synthesis of alkali-activated mortar using phosphogypsum-neutralised bauxite residue Environ. Geotech. (IF 2.2) Pub Date : 2023-05-05 Bheem Pratap, Somenath Mondal, Bendadi Hanumantha Rao
The present study was aimed at perspective utilisation of two wastes, bauxite residue (BR), an extremely alkaline material, and phosphogypsum (PG), a highly acidic substance, of entirely different natures. Development of alkali-activated mortar targeting pavement applications was explored. As BR and PG alone proved to be ineffectual in developing geopolymer/alkali-activated mortar because of undesirably
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Assessment of engineering properties of slag mixtures as a bottom liner in landfills Environ. Geotech. (IF 2.2) Pub Date : 2023-04-24 Manikanta Devarangadi, Uma Shankar Masilamani
This work examines the engineering properties and leachate characteristics of ground granulated blast-furnace slag (GGBS) blended with laterite soil–bentonite mixtures as a bottom landfill liner. In this study, laterite soil is considered a non-expansive and non-plastic clay; in contrast, bentonite is a highly expansive and highly plastic clay. Laboratory experiments were performed to quantify the
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The influence of polymer content on the shear wave velocities in fine sand Environ. Geotech. (IF 2.2) Pub Date : 2023-04-21 Debdeep Sarkar, Wolfgang Lieske, Meisam Goudarzy, Torsten Wichtmann
The usage of various polymers as an alternative in ground improvement problems is steadily gaining popularity. However, certain aspects of the usage of polymers are still not properly addressed. In this research, an experimental programme was undertaken to study the influence of various polymer contents on the shear wave velocities in granular soils. Different polymer concentrations were mixed with
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Geotechnical property development and micro-characteristic evolution of solidified sludge Environ. Geotech. (IF 2.2) Pub Date : 2023-04-18 Kai-Xi An, Yun-Min Chen, Kang Gao, Mei-Lan Zhang, Ji-Wu Lan, Han Ke, Liang-Tong Zhan
Low-strength sludge takes up a lot of space in landfills, creating an environmental concern and a resource waste that needs to be treated right away. A novel mixed solidifying agent is introduced in this work to improve the geotechnical characteristics of sludge. The role of each component in the mixed agent is explored by using a series of different additive dosages in solidification. According to
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Experimental study on uniaxial compression of granite under real-time loading at designated low-temperature conditions Environ. Geotech. (IF 2.2) Pub Date : 2023-04-13 Yi-Feng Zhang, Fan Zhang, Dun-Bo Lv, Xiang Ding
A low temperature and the degree of saturation have important influence on the mechanical properties of rock surrounding cave-type underground liquefied natural gas storage. Uniaxial compression tests were carried out on dry and saturated granite under different real-time loadings at designated low-temperature conditions (25, 0, −20, −40, −50 and −60°C). The porosity and microstructure were then observed
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Water-retention properties of xanthan-gum-biopolymer-treated soils Environ. Geotech. (IF 2.2) Pub Date : 2023-04-13 Ilhan Chang, Gye-Chun Cho, Thi Phuong An Tran
This study aimed to estimate the effects of the xanthan gum biopolymer on the wetting and drying processes of soils. Xanthan gum with different contents by the mass of dried soil was used to treat Jumunjin sand and sand-clay mixtures. The wetting and drying soil-water characteristics of xanthan-gum-biopolymer-treated sand were investigated using capillary rise open tubes and a Fredlund-type soil-water
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Carbon Reduction Design Tool (CReDiT) for excavation and clean cover remediation Environ. Geotech. (IF 2.2) Pub Date : 2023-04-13 Emma E Hellawell, Susan J Hughes, Donya Hajializadeh, Sarah Cook, Richard Brinkworth
Meeting the 2050 net-zero carbon emission target requires all sectors of civil engineering to include the reduction of greenhouse gas emissions (‘carbon emissions’) in their designs. This paper presents the development and early achievements of the Carbon Reduction Design Tool (CReDiT) for excavation and clean cover remediation of brownfield sites. The tool was developed for this remediation technique
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Effect of wetting–drying cycles on the desiccation of tailings pre-dewatered with super absorbent polymer Environ. Geotech. (IF 2.2) Pub Date : 2023-04-03 Anis Roshani, Mamadou Fall, Kevin Kennedy
The main objective of this investigation is to understand the desiccation behaviour of fluid fine tailings (FFT) pre-dewatered with a superabsorbent polymer (SAP) with respect to wetting–drying cycles. Raw FFT (control) and pre-dewatered FFT with SAP were subjected to five cycles of wetting and six cycles of drying. Evaporation was found to be the dominant mechanism in the dewatering of raw FFT, as
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Phenol adsorption properties and microstructural changes of organically modified bentonite Environ. Geotech. (IF 2.2) Pub Date : 2023-04-03 Haijie He, Kuan Chai, Tao Wu, Zhanhong Qiu, Song Feng, Shifang Wang, Haijian Xie, Jun Yao, Jianbin Zhao
Phenolic compounds are prevalent organic contaminants in aquatic and soil environments. To address the issue of phenolic waste water treatment, bentonite can be utilised as an effective adsorbent through organic modification. The present study focuses on using sodium bentonite, which was modified with cetyltrimethylammonium bromide (CTMAB), to remove phenol from an aqueous solution. The influence of
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Long-term environmental impact of an artificial island of solidified dredged marine silt Environ. Geotech. (IF 2.2) Pub Date : 2023-04-03 Shi Shu, Xiaomeng Xue, Qian Wang, Yunquan Li, Pratap Hadkhale
Marine dredging silt that has been solidified is commonly used as a filler material for inland reclamation and artificial island construction. However, determining the long-term environmental safety of artificial islands made of solidified silt is a challenge. A bridge–tunnel conversion artificial island made of solidified silt was the research location of this study. Laboratory tests were conducted
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Long-term behaviour of coir-fibre-reinforced soils Environ. Geotech. (IF 2.2) Pub Date : 2023-04-03 Antonio F S M Reis, Thaís M Freitas, Míriam de Fátima Carvalho, Sandro L Machado
Despite their promising results as reinforcement material, the use of natural fibres often raises concerns about long-term performance and aspects related to biodegradation. This study carried out a comprehensive triaxial testing programme involving treated and non-treated and aged and non-aged specimens to elucidate some aspects of the mechanical behaviour of coir-fibre-reinforced soil. Considering
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Occurrence and ecotoxicological effects of fires at municipal solid waste landfills Environ. Geotech. (IF 2.2) Pub Date : 2023-02-16 Arif Mohammad, Evan K Paleologos, Paweł Ogrodnik, Eugeniusz Koda, Piotr Osiński, Anna Podlasek, Magdalena Daria Vaverková, Venkata Siva Naga Sai Goli, Prithvendra Singh, Kai Wang, Xiao-Hui Chen, Aizhong Ding, Ning-Jun Jiang, Yi-Jie Wang, Devendra Narain Singh
Surface and subsurface fire in municipal solid waste landfills (including dumpsites) is a complex and intricate phenomenon, frequency of which is expected to increase due to climate change. Partial or incomplete combustion of landfill waste at low temperatures during fires leads to the generation of toxic compounds, including hydrocarbons, particulate matter and hazardous gases, which contaminate the
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Prediction of fine tailings settlement in pit lakes using a population growth model Environ. Geotech. (IF 2.2) Pub Date : 2023-02-02 Oladipo Omotoso
A model for predicting the settlement trajectory in saturated fluid fine tailings deposits is described. The model uses a population growth function and leverages established theories in soil mechanics, clay–water surface interactions and biogeochemistry to derive compressibility and permeability functions for predicting the settlement behaviour of fine tailings in deep deposits, typical of end pit
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Reduced wettability in compacted coal fly ash due to organosilane treatment Environ. Geotech. (IF 2.2) Pub Date : 2023-01-17 Carlos M Rodríguez-Guevara, Miguel A Pando, Joan M Larrahondo
Organosilane (OS) treatment for water repellency has gained attention as a mechanism for mitigating leaching and for possible beneficial reuse of coal combustion residuals, particularly coal fly ash (CFA). However, little effort has been devoted to understanding the interaction between OS-treated CFA and water under conditions representative of field applications. In this study, the construction conditions
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Influence of salinity on sedimentation during electrokinetic consolidation of dredged mud Environ. Geotech. (IF 2.2) Pub Date : 2023-01-16 Peter To, Mona Malekzadeh, Nagaratnam Sivakugan, Peter Nguyen, Rahoi Buskens
Electrokinetic consolidation is an innovative method for ground improvement in special conditions such as underwater construction. This method uses a weak electromagnetic field to dewater weak soils or slurries. Due to their chemical structure, water molecules act as dipoles, where the positive charge has a larger spatial distribution. Hence, when a low voltage is applied, water moves towards the cathode
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Influence of salinity on sedimentation during electro-kinetic consolidation of dredged mud Environ. Geotech. (IF 2.2) Pub Date : 2023-01-03 Peter To, Mona Malekzadeh, Nagaratnam Sivakugan, Peter Nguyen, Rahoi Buskens
Electro-kinetic consolidation is an innovative method for ground improvement in special conditions such as underwater construction. This method uses a weak electromagnetic field to dewater weak soils or slurries. Due to the chemical structure, water molecules act as dipoles, where the positive charge has a larger spatial distribution. Hence, when a low voltage is applied, water moves towards the cathode
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The impact of temperature, chlorides and sulfate-reducing bacteria on the corrosion of steel in soil Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Ling Ding, Amir Poursaee
This investigation aimed to study the corrosion performance of low-carbon steel in a soil environment at different temperatures. The steel specimens in the soil were treated at three temperatures: 5, 25 and 60°C. The specimens were embedded in chloride-free soil for 21 days, and then 3.5% (by weight) sodium chloride (NaCl) was added to the soil. The specimens were then kept in the chloride-contaminated
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Environmental impact and mechanical improvement of microbially induced calcium carbonate precipitation-treated coal fly ash–soil mixture Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Junke Zhang, Peidong Su, Kejun Wen, Yadong Li, Lin Li
Reuse of coal fly ash (CFA) as construction materials is one of the sustainable methods for mitigating its environmental impacts. However, the potential leaching of heavy metals and the limited effect on mechanical improvement impede the reuse of CFA. The objective of this research was to investigate the effects of environmental impact and mechanical improvement of the microbially induced calcium carbonate
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Simulation of gas production from hydrate reservoirs (AT1) of Eastern Nankai Trough, Japan Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Yongchang Feng, Lin Chen, Sukru Merey, Koorthedath Pullayikodi Lijith, Devendra N Singh, Atsuki Komiya, Shigenao Maruyama
Gas hydrates are regarded as one of the most promising alternative sources of energy, which have the potential to address the energy demand of a contemporary society. Based on the field explorations in the Eastern Nankai Trough (Japan), a multilayered hydrate reservoir model has been conceptualised and its behaviours during depressurisation production are simulated. This model incorporates the effects
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Remediation of acid mine drainage with recycled concrete aggregates and fly ash Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Masrur Mahedi, Asli Y Dayioglu, Bora Cetin, Stephanie Jones
A study was conducted to evaluate the efficacy of recycled concrete aggregate (RCA) and off-specification fly ash (FA) in remediating acid mine drainage (AMD). The pH and AMD concentrations of calcium (Ca), magnesium (Mg), iron (Fe), chromium (Cr), copper (Cu), manganese (Mn) and zinc (Zn) were assessed. The effects of RCA particle size on pH and AMD metal concentrations were also investigated. Results
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Treatment of Pb (II) and Cu (II) using Na-bentonite-supported nanoscale zero-valent iron Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Chuang Yu, Yang Xu, JiCheng Shao, XiaoQing Cai, XiaoNiu Yu
Nanoscale zero-valent iron (Fe) modified by sodium (Na) bentonite (B-nZVI) was prepared to remove copper (II) (Cu2+) and lead (II) (Pb2+) from an aqueous solution. B-nZVI and sodium bentonite were characterised by X-ray diffraction, Lorentz transmission electron microscopy and X-ray photoelectron spectroscopy (XPS). From the XPS spectra, lead (II) was detected on the surface of B-nZVI, indicating that
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Effects of far-field boundary conditions on the simulation of hydrate production Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Yi Zhang, Hao Luo, Haizuo Zhou, He Qi, Tao Feng, Mengyan Jiang, Xiang Sun
The world’s first offshore methane hydrate extraction was conducted in 2013 at the Daini-Atsumi Knoll located in the eastern Nankai Trough. The results indicated that the gas production rate of a single vertical well cannot meet the requirement for commercialisation of methane hydrate production. Therefore, a trial multi-well system has been considered for future hydrate production. Understanding the
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Experimental study of particle lift initiation on roller-compacted sand–clay mixtures Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Mickael Le Vern, Ouardia Sediki, Andry Razakamanantsoa, Frédéric Murzyn, Frédérique Larrarte
Civil engineering works are sources of dust emissions, which can cause severe security, health and environmental damages to workers and neighbourhoods. This is particularly significant for implementation of earthwork sites. The present paper reports a study conducted to characterise the soil–atmosphere interaction above compacted soils where particle lift is initiated. Mixtures of kaolin clay and sand
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Characteristics of gas hydrate reservoir from resistivity image in the Shenhu area, China Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Dongju Kang, Jing’an Lu, Changwei Qu, Jingli Wang, Yingfeng Xie, Xiujuan Wang, Hongfei Lai, Jinqiang Liang
In 2016, logging-while-drilling (LWD) was conducted at 11 sites in the Shenhu area of the South China Sea to characterise the gas hydrate reservoir. The authors used LWD resistivity image from these sites to analyse the hydrate occurrence mode, near-well structure, sedimentary structure, fracture and in situ stress orientation of the gas hydrate reservoir. The analysis revealed the following. (a) Three
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Analytical solution for transport of degradable contaminant in cut-off wall and aquifer Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Zhang-Long Chen, Shi-Jin Feng, Hong-Xin Chen, Ming-Qing Peng, Yi-Cheng Li, Zhang-Wen Zhu
An analytical solution for contaminant transport through a vertical cut-off wall and aquifer system is developed, which can consider the advection, dispersion and degradation processes. The uniqueness of the solution is that it includes hyperbolic eigenfunctions, considers the degradation process and is suitable for an aquifer with finite thickness due to the existence of a river or lake. The solution
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A bounding surface model of gas-hydrate-bearing sediments Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Liang Kong, Xing Wang, Likun Hua, Xingyu Lin
Gas hydrates are a very promising energy source, but its exploitation also faces some challenges in marine geotechnics. The dissociation and formation of hydrates can significantly change the mechanical properties of sediment layers. Large-scale extraction of natural gas hydrate may trigger submarine landslides; therefore, an appropriate constitutive model is necessary for the safe exploitation of
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DEM simulation of coexistence type methane hydrate bearing sediments Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Jun Liu, Mingjing Jiang
The hydrate morphology in sandy methane hydrate (MH)-bearing sediment (MHBS) is commonly classified as pore-filling, cementation, grain-coating and load-bearing. This paper presents a numerical investigation into the mechanical behaviour of coexistence-type MHBS using the discrete-element method (DEM). The coexistence type is represented as a combination of pore-filling and cementation types. For MHBS
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Rheological model of viscoelastic–plastic geogrid-reinforced tailings Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Fu Yi, Changbo Du
A non-linear, four-parameter viscoelastic–plastic model is proposed to characterise the mechanical properties of geogrids under long-term and low-stress load. In this study, a simplified rheological model of viscoelastic–plastic geogrid-reinforced tailings was established. The stress analysis of the whole reinforced tailings complex was divided into two stages. The time for the tailings to produce
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Deterioration of marine soft clay at east China solidified by cement–metakaolin composite Environ. Geotech. (IF 2.2) Pub Date : 2022-12-05 Tingting Deng, Yongfeng Deng, Xibing Yue, Yujun Cui
The restoration of contaminated sites is attracting increasing attention because of environmental considerations. Barrier walls using cement-based solidified soil are a popular and effective method for enclosing contaminated sites. However, the working environment of cement-based solidified soils is often complicated and results in concern about the durability of the walls. Hence, the deterioration
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Detection of hydrocarbon spills by means of a coaxial impedance dielectric sensor Environ. Geotech. (IF 2.2) Pub Date : 2022-11-23 Franco M Francisca, Marcos A Montoro, Clara A Mozejko
Leakages from storage tanks or pipes frequently produce pollution of soils and groundwater reservoirs by hydrocarbons. Common practices for monitoring and characterising site contamination involve soil drilling, sampling and chemical analysis, complemented with geophysical surveys. This study evaluates the presence of paraffin oil inside soil pores by means of dielectric permittivity measurements,
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Paradigm shifts in incinerator ash, sediment material recovery and landfill monitoring Environ. Geotech. (IF 2.2) Pub Date : 2022-11-10 Evan K Paleologos, Rainer Bunge, Gisela Weibel, Claudia Vitone, Michael Ploetze, Rossella Petti, Eugeniusz Koda, Brendan C O’Kelly, Anna Podlasek, Magdalena Daria Vaverková, Theo Sarris, Venkata Siva Naga Sai Goli, Abdel-Mohsen O Mohamed, Alexander Puzrin, Jan Winkler, Maurizio Iler Marchi, Prithvendra Singh, Louise Weaver, Devendra N Singh
The current paper discusses some selected developments for efficient management of the globally increasing quantity of waste. Incinerator bottom ash (IBA), the heavier ash generated during incineration of municipal waste, is currently utilised in two distinct ways. One pathway is not to fragment IBA and use it as a building material in road construction. This results in reduced landfilled residual
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Corrosion resistance of polyurethane grouting material in landfill site Environ. Geotech. (IF 2.2) Pub Date : 2022-11-03 Qiuju Ke, Chengchao Guo, Huihuan Ma, Fuming Wang
Landfill has been a common way to deal with municipal solid waste. It is critical to prevent the leakage of landfill leachate with corrosivity and biotoxicity in landfill sites. Non-aqueous reacting polyurethane grouting material has been demonstrated to have excellent water-barrier performance. This study aimed to verify the feasibility of non-aqueous reacting polyurethane grouting material application