Bentonite was used as model clay to evaluate the electrochemical degradation and removal of phena... more Bentonite was used as model clay to evaluate the electrochemical degradation and removal of phenanthrene in clay-soils, by applying a dimensionally stable electrode. Gas chromatography couple to mass spectrometry (GC-MS) was used to identify and analyze the post-treatment greases and oils extracted from bentonite. Phenanthrene removal and the products generated by its degradation were evaluated indirectly in bentonite after the process, using physicochemical parameters such as pH, cation exchange capacity, electrical conductivity and zeta potential clay substrate. An acidic front close to the IrO 2-Ta 2 O 5 Ti anode was formed in the presence of OH free radicals. As a result, the physicochemical soil parameters changed throughout the electrochemical cell. The results show that phenantrene was removed from bentonite and degraded after 4 hours of electrokinetic treatment in presence of 0.1 M NaOH.
Sibel Pamukcu1 and Joseph Suhayda2 Low-Strain Shear Measurement Using a Triaxial Vane Device REFE... more Sibel Pamukcu1 and Joseph Suhayda2 Low-Strain Shear Measurement Using a Triaxial Vane Device REFERENCE: Pamukcu, S. and Suhayda, J ... and Stokoe [4] showed that strain rate effects become pronounced at strain amplitudes greater than 10 2% for San Francisco Bay ...
Journal of Materials in Civil Engineering, Sep 1, 2020
AbstractEngineered geomaterials are designed with functionalities on demand to address practical ... more AbstractEngineered geomaterials are designed with functionalities on demand to address practical problems in the geoenvironment, such as filtration and/or retardation of environmentally hazardous s...
The objective of this research was to examine the feasibility of using ground tire rubber as a so... more The objective of this research was to examine the feasibility of using ground tire rubber as a sorbent media in reactive permeable barrier systems. Previous research by the current authors has demonstrated that tire rubber can sorb significant quantities of benzene, toluene, ethylbenzene and O-xylene from aqueous solutions. The current research was run to examine the usage rate of ground rubber in a packed bed reactor under specific contact times. In addition, desorption and repetitive sorption tests were run to determine the reversibility of the sorption process for ground tire rubber. These tests were run to determine the regeneration capacity of ground tire rubber. Results of the study show that the usage rates are greater than 50% with an empty bed contact times of 37 minutes, and minimal amounts of energy are needed to regenerate the tire rubber after use.
A knowledge-based expert system named 'BABE' (Bridge and Building Evaluation) has been de... more A knowledge-based expert system named 'BABE' (Bridge and Building Evaluation) has been developed for the purpose of helping the user in planning, analysis and design of buildings and bridge structures. This paper covers two major items offered by the system: the first is selecting the type of bridge support system to be used with considerations given to local soil type and the geological, hydrogeological and environmental characteristics; the second part is the design of bridge abutments and piers from both structural and geotechnical engineering points of view. 'BABE' can also be used for construction and maintenance planning of various types of building and bridge systems.
Abstract Sensing systems should be lightweight, power-sustainable, and environmentally rugged to ... more Abstract Sensing systems should be lightweight, power-sustainable, and environmentally rugged to facilitate preemptive response to underground events. In this chapter we first discuss fiber-optic underground sensor networks that are suitable for preemptive response applications. We then discuss ideas of crowdsensing, wireless signal networks, and future research on advanced hybrid sensing for preemptive response to underground events/objects.
The Wireless Signal Networks (WSNs) use the signal strength variation of wireless nodes in the ho... more The Wireless Signal Networks (WSNs) use the signal strength variation of wireless nodes in the host medium as the main indicator of events or physical property changes in the medium. With the concept and application of the Underground Wireless Signal Networks (UWSNs) where the host medium is a soil, the real-time global subsurface monitoring of wireless underground sensor networks can be achieved, whereas traditional wireless sensor networks provide point sensing and monitoring. In this paper, we present two representative experiments of subsurface monitoring such as leakage monitoring and earthquake monitoring using wireless sensor nodes. However, the deployment of underground wireless signal networks has more constraint than aboveground deployment, because the radio signal attenuation is much higher than above ground communication. To realize UWSNs for practical subsurface monitoring applications, it is necessary to extend the underground communication radius. In the paper, we provide the estimations of extending underground communication radius of underground wireless nodes based on the proposed underground radio propagation model [1]. Based on the estimations, we introduce a concept of Low Frequency Wireless Signal Networks (LFWSNs) for subsurface monitoring applications as well as an experimental platform for the low frequency wireless signal networks.
Real time global subsurface geo-sensing and monitoring can be achieved using a new concept of wir... more Real time global subsurface geo-sensing and monitoring can be achieved using a new concept of wireless sensor networks. The new concept uses the signal strength variation of wireless sensor nodes in the host medium as the main indicator of a subsurface event or ...
With the concept and application of the Underground Wireless Signal Networks (UWSNs), the global ... more With the concept and application of the Underground Wireless Signal Networks (UWSNs), the global subsurface monitoring in real-time can be achieved. The wireless signal networks use the signal strength variation of wireless sensor nodes in the host medium (ie, soil in ...
A series of tests were conducted to investigate the improvement of damping properties of clay sam... more A series of tests were conducted to investigate the improvement of damping properties of clay samples with geosynthetic inclusions. Flexible thermoplastic polymer synthetics improve damping properties of clay samples. Resonant column tests were conducted to measure the low strain shear modulus and damping ratio of laboratory prepared synthetic inclusion clay specimens. The shear modulus and damping ratio of the reinforced
ABSTRACT Monitoring the onset of a geo-event such as the intrusion of a chemical plume or a slow ... more ABSTRACT Monitoring the onset of a geo-event such as the intrusion of a chemical plume or a slow progressive mass slide that results in marked changes in the physical properties of the host soil could be potentially accomplished using a distributed network of embedded radio transceivers. This paper introduces a new concept of subsurface geo-event monitoring, which takes advantage of the spatial and temporal variations in signal strength of electromagnetic (EM) waves transmitted within the net of distributed radios within a sensing area. Results of experiments in the laboratory and the field demonstrated that variations in EM signal strength could be used to detect physical changes in the subsurface. Changes in selected physical properties of host soil including water content, density, and formation of discontinuities could be discerned from the changes in the signal strength of the transmitted wave between embedded radio transceivers. Good agreement was observed between a theoretical model and the experimental results for inter-transceiver distances less than 55 cm. These results demonstrated a viable new approach for distributed sensing and monitoring of subsurface hazards for civil infrastructure within a networked domain of radio transceivers.
Journal of Geotechnical and Geoenvironmental Engineering, Apr 1, 1997
The purpose of the current study is to examine the ability of ground rubber to sorb benzene and O... more The purpose of the current study is to examine the ability of ground rubber to sorb benzene and O-xylene from water contained with aromatic hydrocarbons. The study consisted of running both batch and packed bed column tests to determine the sorption capacity, the required sorption equilibration time, and the flow through utilization efficiency of ground rubber under various contact times
An accurate and simple radio propagation model for underground low-power devices such as wireless... more An accurate and simple radio propagation model for underground low-power devices such as wireless sensor nodes is introduced and its performance is evaluated by real wireless sensor nodes. The proposed model describes underground radio signal propagation that is proportional to e −2αρ /ρ 2 where ρ represents the distance and α represents the attenuation constant reflecting the soil properties. To evaluate the proposed underground radio propagation model, experiments measuring the radio signal strength with underground sensor nodes were conducted in various sub-surface conditions. Comparing the theoretical estimations of the underground radio propagation and the measured data, the theoretical model fits the measured data well within a 3.45dBm deviation or with an accuracy of 96.33% on average.
Bentonite was used as model clay to evaluate the electrochemical degradation and removal of phena... more Bentonite was used as model clay to evaluate the electrochemical degradation and removal of phenanthrene in clay-soils, by applying a dimensionally stable electrode. Gas chromatography couple to mass spectrometry (GC-MS) was used to identify and analyze the post-treatment greases and oils extracted from bentonite. Phenanthrene removal and the products generated by its degradation were evaluated indirectly in bentonite after the process, using physicochemical parameters such as pH, cation exchange capacity, electrical conductivity and zeta potential clay substrate. An acidic front close to the IrO 2-Ta 2 O 5 Ti anode was formed in the presence of OH free radicals. As a result, the physicochemical soil parameters changed throughout the electrochemical cell. The results show that phenantrene was removed from bentonite and degraded after 4 hours of electrokinetic treatment in presence of 0.1 M NaOH.
Sibel Pamukcu1 and Joseph Suhayda2 Low-Strain Shear Measurement Using a Triaxial Vane Device REFE... more Sibel Pamukcu1 and Joseph Suhayda2 Low-Strain Shear Measurement Using a Triaxial Vane Device REFERENCE: Pamukcu, S. and Suhayda, J ... and Stokoe [4] showed that strain rate effects become pronounced at strain amplitudes greater than 10 2% for San Francisco Bay ...
Journal of Materials in Civil Engineering, Sep 1, 2020
AbstractEngineered geomaterials are designed with functionalities on demand to address practical ... more AbstractEngineered geomaterials are designed with functionalities on demand to address practical problems in the geoenvironment, such as filtration and/or retardation of environmentally hazardous s...
The objective of this research was to examine the feasibility of using ground tire rubber as a so... more The objective of this research was to examine the feasibility of using ground tire rubber as a sorbent media in reactive permeable barrier systems. Previous research by the current authors has demonstrated that tire rubber can sorb significant quantities of benzene, toluene, ethylbenzene and O-xylene from aqueous solutions. The current research was run to examine the usage rate of ground rubber in a packed bed reactor under specific contact times. In addition, desorption and repetitive sorption tests were run to determine the reversibility of the sorption process for ground tire rubber. These tests were run to determine the regeneration capacity of ground tire rubber. Results of the study show that the usage rates are greater than 50% with an empty bed contact times of 37 minutes, and minimal amounts of energy are needed to regenerate the tire rubber after use.
A knowledge-based expert system named 'BABE' (Bridge and Building Evaluation) has been de... more A knowledge-based expert system named 'BABE' (Bridge and Building Evaluation) has been developed for the purpose of helping the user in planning, analysis and design of buildings and bridge structures. This paper covers two major items offered by the system: the first is selecting the type of bridge support system to be used with considerations given to local soil type and the geological, hydrogeological and environmental characteristics; the second part is the design of bridge abutments and piers from both structural and geotechnical engineering points of view. 'BABE' can also be used for construction and maintenance planning of various types of building and bridge systems.
Abstract Sensing systems should be lightweight, power-sustainable, and environmentally rugged to ... more Abstract Sensing systems should be lightweight, power-sustainable, and environmentally rugged to facilitate preemptive response to underground events. In this chapter we first discuss fiber-optic underground sensor networks that are suitable for preemptive response applications. We then discuss ideas of crowdsensing, wireless signal networks, and future research on advanced hybrid sensing for preemptive response to underground events/objects.
The Wireless Signal Networks (WSNs) use the signal strength variation of wireless nodes in the ho... more The Wireless Signal Networks (WSNs) use the signal strength variation of wireless nodes in the host medium as the main indicator of events or physical property changes in the medium. With the concept and application of the Underground Wireless Signal Networks (UWSNs) where the host medium is a soil, the real-time global subsurface monitoring of wireless underground sensor networks can be achieved, whereas traditional wireless sensor networks provide point sensing and monitoring. In this paper, we present two representative experiments of subsurface monitoring such as leakage monitoring and earthquake monitoring using wireless sensor nodes. However, the deployment of underground wireless signal networks has more constraint than aboveground deployment, because the radio signal attenuation is much higher than above ground communication. To realize UWSNs for practical subsurface monitoring applications, it is necessary to extend the underground communication radius. In the paper, we provide the estimations of extending underground communication radius of underground wireless nodes based on the proposed underground radio propagation model [1]. Based on the estimations, we introduce a concept of Low Frequency Wireless Signal Networks (LFWSNs) for subsurface monitoring applications as well as an experimental platform for the low frequency wireless signal networks.
Real time global subsurface geo-sensing and monitoring can be achieved using a new concept of wir... more Real time global subsurface geo-sensing and monitoring can be achieved using a new concept of wireless sensor networks. The new concept uses the signal strength variation of wireless sensor nodes in the host medium as the main indicator of a subsurface event or ...
With the concept and application of the Underground Wireless Signal Networks (UWSNs), the global ... more With the concept and application of the Underground Wireless Signal Networks (UWSNs), the global subsurface monitoring in real-time can be achieved. The wireless signal networks use the signal strength variation of wireless sensor nodes in the host medium (ie, soil in ...
A series of tests were conducted to investigate the improvement of damping properties of clay sam... more A series of tests were conducted to investigate the improvement of damping properties of clay samples with geosynthetic inclusions. Flexible thermoplastic polymer synthetics improve damping properties of clay samples. Resonant column tests were conducted to measure the low strain shear modulus and damping ratio of laboratory prepared synthetic inclusion clay specimens. The shear modulus and damping ratio of the reinforced
ABSTRACT Monitoring the onset of a geo-event such as the intrusion of a chemical plume or a slow ... more ABSTRACT Monitoring the onset of a geo-event such as the intrusion of a chemical plume or a slow progressive mass slide that results in marked changes in the physical properties of the host soil could be potentially accomplished using a distributed network of embedded radio transceivers. This paper introduces a new concept of subsurface geo-event monitoring, which takes advantage of the spatial and temporal variations in signal strength of electromagnetic (EM) waves transmitted within the net of distributed radios within a sensing area. Results of experiments in the laboratory and the field demonstrated that variations in EM signal strength could be used to detect physical changes in the subsurface. Changes in selected physical properties of host soil including water content, density, and formation of discontinuities could be discerned from the changes in the signal strength of the transmitted wave between embedded radio transceivers. Good agreement was observed between a theoretical model and the experimental results for inter-transceiver distances less than 55 cm. These results demonstrated a viable new approach for distributed sensing and monitoring of subsurface hazards for civil infrastructure within a networked domain of radio transceivers.
Journal of Geotechnical and Geoenvironmental Engineering, Apr 1, 1997
The purpose of the current study is to examine the ability of ground rubber to sorb benzene and O... more The purpose of the current study is to examine the ability of ground rubber to sorb benzene and O-xylene from water contained with aromatic hydrocarbons. The study consisted of running both batch and packed bed column tests to determine the sorption capacity, the required sorption equilibration time, and the flow through utilization efficiency of ground rubber under various contact times
An accurate and simple radio propagation model for underground low-power devices such as wireless... more An accurate and simple radio propagation model for underground low-power devices such as wireless sensor nodes is introduced and its performance is evaluated by real wireless sensor nodes. The proposed model describes underground radio signal propagation that is proportional to e −2αρ /ρ 2 where ρ represents the distance and α represents the attenuation constant reflecting the soil properties. To evaluate the proposed underground radio propagation model, experiments measuring the radio signal strength with underground sensor nodes were conducted in various sub-surface conditions. Comparing the theoretical estimations of the underground radio propagation and the measured data, the theoretical model fits the measured data well within a 3.45dBm deviation or with an accuracy of 96.33% on average.
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Papers by Sibel Pamukcu