The Experts below are selected from a list of 3489 Experts worldwide ranked by ideXlab platform
Suksun Horpibulsuk - One of the best experts on this subject based on the ideXlab platform.
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recycled waste foundry sand as a sustainable subgrade fill and pipe bedding construction material engineering and environmental evaluation
Sustainable Cities and Society, 2017Co-Authors: Arul Arulrajah, Ehsan Yaghoubi, Monzur Alam Imteaz, Suksun HorpibulsukAbstract:Abstract Waste foundry sand (WFS) is the primary by-product of foundries. Due to metals present in WFS and negative public perception, this material is commonly discarded to landfill as a waste material. WFS can however be potentially reused as a construction material in civil engineering infrastructure projects. In order to use WFS in a sustainable manner, the engineering properties of this material needs to be properly evaluated and assessed against local requirements. In this research, geotechnical and environmental tests were undertaken to evaluate the properties and viability of WFS for usage in civil engineering construction projects. In addition, control tests were undertaken on recycled glass (RG), a well-accepted waste material that has been successfully implemented in civil engineering applications, for benchmarking purposes. Geotechnical test results, including determination of maximum dry density (MDD) and optimum moisture content (OMC), California bearing ratio (CBR) and permeability, indicate that WFS can satisfactorily be used as fill material in Embankments and in pipe-bedding applications. Comparisons of the environmental test results such as chemical composition and leachate analysis, with the requirements of local authorities indicated no particular hazards in the implementation of this material in applications such as Road Embankment fills and pipe-bedding. The carbon footprint savings through any potential reuse of WFS/RG was furthermore quantified.
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spent coffee grounds as a non structural Embankment fill material engineering and environmental considerations
Journal of Cleaner Production, 2014Co-Authors: Arul Arulrajah, Suksun Horpibulsuk, Farshid Maghoolpilehrood, M M DisfaniAbstract:In recent years, research into the engineering properties of highly organic materials have been undertaken to determine their engineering properties when used as Road Embankment fill materials. A prime contributor of organic wastes in municipal landfills is spent coffee grounds from cafes and domestic households. As part of this research, an extensive suite of engineering and environmental tests were undertaken on spent coffee grounds obtained from several popular cafes in Melbourne, Australia to evaluate their properties and potential use as a non-structural fill material in Road Embankments. The suite of engineering tests included, particle size distribution, Atterberg limits, particle density, standard compaction tests, static triaxial tests, oedometer consolidation, pH and organic content tests. In addition, a suite of chemical tests comprising leaching and polycyclic aromatic hydrocarbon tests were undertaken on the coffee grounds. From an environmental perspective, coffee grounds were found to pose no environmental and leaching issue for use as an Embankment fill material. From an engineering material perspective, the high organic content, low maximum dry densities and high optimum moisture content restricts the usage of this material to non-structural fill applications where the material will not have to sustain high traffic loadings. The usage of spent coffee grounds as non-structural fill material in Embankments was found to be a viable end-of-life option to divert coffee grounds from landfills and furthermore to maximize the naturally high organic content present in the coffee grounds for vegetation purposes.
Arul Arulrajah - One of the best experts on this subject based on the ideXlab platform.
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recycled waste foundry sand as a sustainable subgrade fill and pipe bedding construction material engineering and environmental evaluation
Sustainable Cities and Society, 2017Co-Authors: Arul Arulrajah, Ehsan Yaghoubi, Monzur Alam Imteaz, Suksun HorpibulsukAbstract:Abstract Waste foundry sand (WFS) is the primary by-product of foundries. Due to metals present in WFS and negative public perception, this material is commonly discarded to landfill as a waste material. WFS can however be potentially reused as a construction material in civil engineering infrastructure projects. In order to use WFS in a sustainable manner, the engineering properties of this material needs to be properly evaluated and assessed against local requirements. In this research, geotechnical and environmental tests were undertaken to evaluate the properties and viability of WFS for usage in civil engineering construction projects. In addition, control tests were undertaken on recycled glass (RG), a well-accepted waste material that has been successfully implemented in civil engineering applications, for benchmarking purposes. Geotechnical test results, including determination of maximum dry density (MDD) and optimum moisture content (OMC), California bearing ratio (CBR) and permeability, indicate that WFS can satisfactorily be used as fill material in Embankments and in pipe-bedding applications. Comparisons of the environmental test results such as chemical composition and leachate analysis, with the requirements of local authorities indicated no particular hazards in the implementation of this material in applications such as Road Embankment fills and pipe-bedding. The carbon footprint savings through any potential reuse of WFS/RG was furthermore quantified.
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spent coffee grounds as a non structural Embankment fill material engineering and environmental considerations
Journal of Cleaner Production, 2014Co-Authors: Arul Arulrajah, Suksun Horpibulsuk, Farshid Maghoolpilehrood, M M DisfaniAbstract:In recent years, research into the engineering properties of highly organic materials have been undertaken to determine their engineering properties when used as Road Embankment fill materials. A prime contributor of organic wastes in municipal landfills is spent coffee grounds from cafes and domestic households. As part of this research, an extensive suite of engineering and environmental tests were undertaken on spent coffee grounds obtained from several popular cafes in Melbourne, Australia to evaluate their properties and potential use as a non-structural fill material in Road Embankments. The suite of engineering tests included, particle size distribution, Atterberg limits, particle density, standard compaction tests, static triaxial tests, oedometer consolidation, pH and organic content tests. In addition, a suite of chemical tests comprising leaching and polycyclic aromatic hydrocarbon tests were undertaken on the coffee grounds. From an environmental perspective, coffee grounds were found to pose no environmental and leaching issue for use as an Embankment fill material. From an engineering material perspective, the high organic content, low maximum dry densities and high optimum moisture content restricts the usage of this material to non-structural fill applications where the material will not have to sustain high traffic loadings. The usage of spent coffee grounds as non-structural fill material in Embankments was found to be a viable end-of-life option to divert coffee grounds from landfills and furthermore to maximize the naturally high organic content present in the coffee grounds for vegetation purposes.
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select chemical and engineering properties of wastewater biosolids
Waste Management, 2011Co-Authors: Arul Arulrajah, M M Disfani, V Suthagaran, Monzur Alam ImteazAbstract:The select chemical and engineering characteristics of biosolids produced at a wastewater treatment plant in Eastern Australia were investigated to assess its suitability as structural fill material in Road Embankments. Results of comprehensive set of geotechnical experimentation including compaction, consolidation, creep, hydraulic conductivity and shear strength tests implied that biosolids demonstrate behavior similar to highly organic clays with a higher potential for consolidation and settlement. Results of chemical study including heavy metals, dichloro diphenyl trichloroethane (and derivatives) and organochlorine pesticides, indicate that biosolids samples are within the acceptable limits which allows their usage under certain guidelines. Results of tests on pathogens (bacteria, viruses or parasites) also indicated that biosolids were within the safe acceptable limits. Technical and management suggestions have been provided to minimize the possible environmental risks of using biosolids in Road Embankment fills.
Mohd Badrul Hafiz Che Omar - One of the best experts on this subject based on the ideXlab platform.
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slope stability prediction of Road Embankment on soft ground treated with prefabricated vertical drains using artificial neural network
IAES International Journal of Artificial Intelligence, 2020Co-Authors: Rufaizal Che Mamat, Abd Manan Samad, Anuar Kasa, Siti Fatin Mohd Razali, Azuin Ramli, Mohd Badrul Hafiz Che OmarAbstract:This paper presents the slope stability for Road Embankment constructed on the soft ground treated with prefabricated vertical drains (PVDs). The slope stability was evaluated based on the factor of safety (FOS) through numerical analysis and modeled with an artificial neural network (ANN). The permeability ratio of the smear effect was verified based on a comparative analysis between field data and numerical simulation to develop the datasets used in ANN model training. A total of 75 datasets generated from numerical simulations were randomly selected into three groups for training, testing, and validation. The coefficient of determination ( R 2 ) and root mean square error (RMSE) were considered to evaluate the performance ANN model. It was found that the developed ANN model showed strong potential for predicting slope stability within the accepted range.
Rufaizal Che Mamat - One of the best experts on this subject based on the ideXlab platform.
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slope stability prediction of Road Embankment on soft ground treated with prefabricated vertical drains using artificial neural network
IAES International Journal of Artificial Intelligence, 2020Co-Authors: Rufaizal Che Mamat, Abd Manan Samad, Anuar Kasa, Siti Fatin Mohd Razali, Azuin Ramli, Mohd Badrul Hafiz Che OmarAbstract:This paper presents the slope stability for Road Embankment constructed on the soft ground treated with prefabricated vertical drains (PVDs). The slope stability was evaluated based on the factor of safety (FOS) through numerical analysis and modeled with an artificial neural network (ANN). The permeability ratio of the smear effect was verified based on a comparative analysis between field data and numerical simulation to develop the datasets used in ANN model training. A total of 75 datasets generated from numerical simulations were randomly selected into three groups for training, testing, and validation. The coefficient of determination ( R 2 ) and root mean square error (RMSE) were considered to evaluate the performance ANN model. It was found that the developed ANN model showed strong potential for predicting slope stability within the accepted range.
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comparative analysis of settlement and pore water pressure of Road Embankment on yan soft soil treated with pvds
Civil Engineering Journal, 2019Co-Authors: Rufaizal Che Mamat, Anuar Kasa, Siti Fatin Mohd RazaliAbstract:The application of prefabricated vertical drains (PVDs) in the Road Embankment construction has been successfully performed in many projects throughout the country. The simulation of finite element method (FEM) can assist engineers in modelling very complex structures and foundations. This paper presents a plane–strain numerical analysis that was performed to verify the effectiveness of the model Embankment stabilised with PVD using Plaxis 2D version 8. This study employed the smear effect of permeability ratio ( k r ) of 3 in the PVD modelling. The data of settlement and pore water pressure in the left and right sides of Road Embankment were monitored for 177 days, then the data were collected and compared by a numerical simulation. The coefficient of determination ( R 2 ) was used to assess the performance of the comparative analysis. The results of numerical simulation on settlement and pore water pressure obtained a coefficient of determination of greater than 0.9 which has reached a good agreement with those of the field measurement. On other the hand, there was no significant difference in the performance between both sides of the Embankment. The smear effect parameter ( k r = 3 ) is recommended for PVD designs and can provide accurate FEM prediction.
Jiding Chen - One of the best experts on this subject based on the ideXlab platform.
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effectiveness of erosion control measures along the qinghai tibet highway tibetan plateau china
Transportation Research Part D-transport and Environment, 2006Co-Authors: Keli Zhang, Yaping Kong, Jiding ChenAbstract:Severe runoff and water erosion can occur from Road sideslopes. To investigate the magnitude of runoff and soil loss from Road Embankment and the effectiveness of a range of engineering and non-engineering erosion control measures, runoff and soil loss were measured along the Qinghai–Tibet highway near Tuotuo river in the summers of 2003 and 2004. The site is characterized by its high altitude, low summer rainfall and permanently poor vegetation cover. The results show that engineering measures can be effective in the short term, while re-vegetation of the Road sideslopes is effective when the vegetation cover is established. A combination of lattice and re-vegetation is most effective overall.
