Barry Scheetz | Pennsylvania State University (original) (raw)
Papers by Barry Scheetz
Journal of the American Society of Mining and Reclamation, Jun 30, 2002
Transportation Research Record: Journal of the Transportation Research Board, 2011
The objective of this study was to quantify sediment generation rates from unpaved roads before a... more The objective of this study was to quantify sediment generation rates from unpaved roads before and after placement of a durable unbound surface aggregate. Sediment pollution from unpaved roads is a well-documented problem across the United States and the world. The quality of road surface material is a large determining factor in how much sediment is generated from the road surface during rain events. This study attempted to quantify the sediment reduction potential of driving surface aggregate (DSA), an unbound aggregate specification used in Pennsylvania that was designed specifically as a wearing course for gravel roads. DSA is widely used to surface roads in Pennsylvania to reduce road runoff in environmentally sensitive areas. The road surface erosion rates in this study were measured on two sites before DSA placement and at time intervals of 1 month, 1 year, and 2 years after placement. A rainfall simulator was employed to generate a consistent and repeatable storm event over...
Role of Cement Science in Sustainable Development, 2003
The large bench-scale permeability testing of anhydrite rock and a grout designed to act as a sea... more The large bench-scale permeability testing of anhydrite rock and a grout designed to act as a seal in contact with this rock was conducted at the Terra Tek, Inc. research facility in Salt Lake City, Utah. Pressurized flow of a dye-marked fluid from the borehole cavity of the test specimen was recorded at 45 psi (0.31 MPa) differential head pressure. Test parameters were altered and the flow recorded for differential pressures varying up to about 125 psi (0.86 MPa) in 25 psi (0.17 MPa) intervals with a constant confining pressure. In all cases, the fluid flow was observed to increase. The dimensions of the test specimen and test conditions correspond to an observed permeability of between 0.84 and 1.5 millidarcys, based upon the grout plug area. Post-test examination of the rock/grout core indicated that the flow was principally interfacial flow. However, marked flow paths within the grout were also noted. The development of numerous heavily dye-marked ''washout'' reg...
American Mineralogist, 1992
Synthesis studies in the system K 2 O-UO 3 -SiO 2 -H 2 O are presented as an isothermal isobaric ... more Synthesis studies in the system K 2 O-UO 3 -SiO 2 -H 2 O are presented as an isothermal isobaric projection through the system at 300°C and 30MPa. In additionto the compatibility relationships for weeksite, boltwoodite and soddyite, a new previously unreported hydrous alkali uranyl silicate similar in composition to weeksite was identified. Infrared spectroscopy supplemented X-ray diffraction methods to characterize the structures of the quaternary phases
"SP-221: Eighth CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete", 2004
The chief objectives of this research project were to evaluate the concrete maturity method as a ... more The chief objectives of this research project were to evaluate the concrete maturity method as a quality control/quality assurance (QC/QA) tool for Pennsylvania highway concrete structures, and to provide protocol and specifications for use based on the evaluation. The concrete maturity method is a form of nondestructive testing that is used to estimate the strength of concrete structures based on the monitored temperature history. Representative concrete cylinders fabricated and cured with the product are time-consuming to make and do not always attain the same strengths as the product because of probable temperature history differences. By accepting the maturity method into practice, the number of companion cylinders cured with the product can be reduced. A pier, a bridge deck, and a pavement slab with mixtures containing approximately 35% ground granulated blast furnace slag (as a replacement of total cementitious material) were investigated and three separate maturity-recording ...
Scientific Basis for Nuclear Waste Management, 1979
Gas and liquid permeability measurement methods have been developed and utilized for characteriza... more Gas and liquid permeability measurement methods have been developed and utilized for characterization of cement composites and rocks for application to nuclear waste geologic repository problems. Permeabilities in the millidarcy to tens of nanodarcys range have been measured reproducibly and are related to problems of borehole plugging and shaft sealing.
Scientific Basis for Nuclear Waste Management, 1979
Sulfonated naphthalene and melamine formaldehyde condensates have been studied as superplasticizi... more Sulfonated naphthalene and melamine formaldehyde condensates have been studied as superplasticizing admixtures used to reduce the necessary water content of cement mixes. Their role in producing dense low porosity composites in nuclear waste isolation applications is discussed. Zeta potential, flow, adsorption characteristics, viscosity, setting time and compressive strength data are reported.
Nuclear and Chemical Waste Management, 1982
... However, an effective diffusivity can be adequately employed as 42 DM ROY, BE SCHEETZ, LD WAK... more ... However, an effective diffusivity can be adequately employed as 42 DM ROY, BE SCHEETZ, LD WAKELEY, AND MW BARNES TABLE 9 Paige Leachability of Selected Cations from an As-Received Silicate-based/Pollucite Composite C ... 3. Moore, JG and McDaniel, EW Ceram. ...
Nuclear and Chemical Waste Management, 1981
Abstract The hydrothermal dissolution behavior of two simulated nuclear waste forms, a borosilica... more Abstract The hydrothermal dissolution behavior of two simulated nuclear waste forms, a borosilicate glass and a tailored ceramic, was investigated by three types of high pressure apparatus: sealed gold capsules in cold seal pressure vessels, a rocking autoclave apparatus, and a fluid injection, flow-through type apparatus. Saturation of the solutions was observed in both cold seal and rocking autoclave apparatus which provide information about limiting solubilities, solid reaction products, and kinetic data near saturation. The flow-through system provides kinetic data at high undersaturations and gives the hydrothermal dissolution rates that are most comparable to leach rates determined with atmospheric pressure measurements.
Advances in Chemistry, 1980
MRS Proceedings, 1989
The substitution of Al into the structure of tobermorite was investigated, along with the resulta... more The substitution of Al into the structure of tobermorite was investigated, along with the resultant phase assemblages that compatibly coexist with the Al-tobermorite. All experiments were conducted under hydrothermal conditions at saturated steam pressure. The temperatures of the experiments varied from 90° to 190°C and times from 1 to 28 days. Ca/Si ratios varied from 0.7 to 1.7, Al/(Al+Si) from 0.12 to 0.30. NaOH varied from none to 5 moles/mole tobermorite constituents. X-ray diffraction was used not only to identify phases but to determine degree of substitution and the rate of approach to steady state.Maximum Al substitution was found to be Al/(Al+Si) = 0.13, and the maximum interlayer spacing was 11.42 ± 0.015 Å. This is in agreement with previously published work which found a trace of hydrogarnet at Al(Al+Si) = 0.15 and a maximum interlayer spacing of 11.45 ± 0.02 A. When Al concentrations in the mix are greater than enough to make maximum Al-tobermorite, “low”-hydrogarnet (...
MRS Proceedings, 1981
Pollucite (CsAlSi206) has been suggested [1,2] as a suitable phase for the incorporation and immo... more Pollucite (CsAlSi206) has been suggested [1,2] as a suitable phase for the incorporation and immobilization of 137Cs, on the basis of its refractory nature and leach resistance. The phase also occurs in tailored ceramic formulations designed for the disposal of commercial reprocessing waste [3,4] and zeolites which are heavily loaded with Cs [5,6].
Midcontinental Journal of Archaeology, 2004
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One of the leading candidate waste forms for disposal of commercial high level nuclear waste is g... more One of the leading candidate waste forms for disposal of commercial high level nuclear waste is glass. This waste form has received a great deal of attention over the past twenty years of development. Alteration of this waste form in the presence of mild hydrothermal solutions, which might be anticipated during the first several hundred years after emplacement of the waste into a geological repository, was shown (1) to be extensive at 300°C. These stability experiments, however, were conducted in a closed static hydrothermal system with the waste form and deionized water alone.
American Mineralogist, 1989
Advances in X-Ray Analysis, 1981
Accurate phase characterization of the alteration products of rad-waste requires the separation a... more Accurate phase characterization of the alteration products of rad-waste requires the separation and identification of scattered individual grains from among the bulk product. These grains are typically 5 to 100 μm in size. Bulk x-ray powder diffraction will normally not detect these minor phases, and even if the phase can be detected, it often may not be identifiable. The use of the Gandolfi technique with the individual particle not only facilitates the identification, but also allows the assignment of the identification to the specific grain.
Journal of the American Society of Mining and Reclamation, Jun 30, 2002
Transportation Research Record: Journal of the Transportation Research Board, 2011
The objective of this study was to quantify sediment generation rates from unpaved roads before a... more The objective of this study was to quantify sediment generation rates from unpaved roads before and after placement of a durable unbound surface aggregate. Sediment pollution from unpaved roads is a well-documented problem across the United States and the world. The quality of road surface material is a large determining factor in how much sediment is generated from the road surface during rain events. This study attempted to quantify the sediment reduction potential of driving surface aggregate (DSA), an unbound aggregate specification used in Pennsylvania that was designed specifically as a wearing course for gravel roads. DSA is widely used to surface roads in Pennsylvania to reduce road runoff in environmentally sensitive areas. The road surface erosion rates in this study were measured on two sites before DSA placement and at time intervals of 1 month, 1 year, and 2 years after placement. A rainfall simulator was employed to generate a consistent and repeatable storm event over...
Role of Cement Science in Sustainable Development, 2003
The large bench-scale permeability testing of anhydrite rock and a grout designed to act as a sea... more The large bench-scale permeability testing of anhydrite rock and a grout designed to act as a seal in contact with this rock was conducted at the Terra Tek, Inc. research facility in Salt Lake City, Utah. Pressurized flow of a dye-marked fluid from the borehole cavity of the test specimen was recorded at 45 psi (0.31 MPa) differential head pressure. Test parameters were altered and the flow recorded for differential pressures varying up to about 125 psi (0.86 MPa) in 25 psi (0.17 MPa) intervals with a constant confining pressure. In all cases, the fluid flow was observed to increase. The dimensions of the test specimen and test conditions correspond to an observed permeability of between 0.84 and 1.5 millidarcys, based upon the grout plug area. Post-test examination of the rock/grout core indicated that the flow was principally interfacial flow. However, marked flow paths within the grout were also noted. The development of numerous heavily dye-marked ''washout'' reg...
American Mineralogist, 1992
Synthesis studies in the system K 2 O-UO 3 -SiO 2 -H 2 O are presented as an isothermal isobaric ... more Synthesis studies in the system K 2 O-UO 3 -SiO 2 -H 2 O are presented as an isothermal isobaric projection through the system at 300°C and 30MPa. In additionto the compatibility relationships for weeksite, boltwoodite and soddyite, a new previously unreported hydrous alkali uranyl silicate similar in composition to weeksite was identified. Infrared spectroscopy supplemented X-ray diffraction methods to characterize the structures of the quaternary phases
"SP-221: Eighth CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete", 2004
The chief objectives of this research project were to evaluate the concrete maturity method as a ... more The chief objectives of this research project were to evaluate the concrete maturity method as a quality control/quality assurance (QC/QA) tool for Pennsylvania highway concrete structures, and to provide protocol and specifications for use based on the evaluation. The concrete maturity method is a form of nondestructive testing that is used to estimate the strength of concrete structures based on the monitored temperature history. Representative concrete cylinders fabricated and cured with the product are time-consuming to make and do not always attain the same strengths as the product because of probable temperature history differences. By accepting the maturity method into practice, the number of companion cylinders cured with the product can be reduced. A pier, a bridge deck, and a pavement slab with mixtures containing approximately 35% ground granulated blast furnace slag (as a replacement of total cementitious material) were investigated and three separate maturity-recording ...
Scientific Basis for Nuclear Waste Management, 1979
Gas and liquid permeability measurement methods have been developed and utilized for characteriza... more Gas and liquid permeability measurement methods have been developed and utilized for characterization of cement composites and rocks for application to nuclear waste geologic repository problems. Permeabilities in the millidarcy to tens of nanodarcys range have been measured reproducibly and are related to problems of borehole plugging and shaft sealing.
Scientific Basis for Nuclear Waste Management, 1979
Sulfonated naphthalene and melamine formaldehyde condensates have been studied as superplasticizi... more Sulfonated naphthalene and melamine formaldehyde condensates have been studied as superplasticizing admixtures used to reduce the necessary water content of cement mixes. Their role in producing dense low porosity composites in nuclear waste isolation applications is discussed. Zeta potential, flow, adsorption characteristics, viscosity, setting time and compressive strength data are reported.
Nuclear and Chemical Waste Management, 1982
... However, an effective diffusivity can be adequately employed as 42 DM ROY, BE SCHEETZ, LD WAK... more ... However, an effective diffusivity can be adequately employed as 42 DM ROY, BE SCHEETZ, LD WAKELEY, AND MW BARNES TABLE 9 Paige Leachability of Selected Cations from an As-Received Silicate-based/Pollucite Composite C ... 3. Moore, JG and McDaniel, EW Ceram. ...
Nuclear and Chemical Waste Management, 1981
Abstract The hydrothermal dissolution behavior of two simulated nuclear waste forms, a borosilica... more Abstract The hydrothermal dissolution behavior of two simulated nuclear waste forms, a borosilicate glass and a tailored ceramic, was investigated by three types of high pressure apparatus: sealed gold capsules in cold seal pressure vessels, a rocking autoclave apparatus, and a fluid injection, flow-through type apparatus. Saturation of the solutions was observed in both cold seal and rocking autoclave apparatus which provide information about limiting solubilities, solid reaction products, and kinetic data near saturation. The flow-through system provides kinetic data at high undersaturations and gives the hydrothermal dissolution rates that are most comparable to leach rates determined with atmospheric pressure measurements.
Advances in Chemistry, 1980
MRS Proceedings, 1989
The substitution of Al into the structure of tobermorite was investigated, along with the resulta... more The substitution of Al into the structure of tobermorite was investigated, along with the resultant phase assemblages that compatibly coexist with the Al-tobermorite. All experiments were conducted under hydrothermal conditions at saturated steam pressure. The temperatures of the experiments varied from 90° to 190°C and times from 1 to 28 days. Ca/Si ratios varied from 0.7 to 1.7, Al/(Al+Si) from 0.12 to 0.30. NaOH varied from none to 5 moles/mole tobermorite constituents. X-ray diffraction was used not only to identify phases but to determine degree of substitution and the rate of approach to steady state.Maximum Al substitution was found to be Al/(Al+Si) = 0.13, and the maximum interlayer spacing was 11.42 ± 0.015 Å. This is in agreement with previously published work which found a trace of hydrogarnet at Al(Al+Si) = 0.15 and a maximum interlayer spacing of 11.45 ± 0.02 A. When Al concentrations in the mix are greater than enough to make maximum Al-tobermorite, “low”-hydrogarnet (...
MRS Proceedings, 1981
Pollucite (CsAlSi206) has been suggested [1,2] as a suitable phase for the incorporation and immo... more Pollucite (CsAlSi206) has been suggested [1,2] as a suitable phase for the incorporation and immobilization of 137Cs, on the basis of its refractory nature and leach resistance. The phase also occurs in tailored ceramic formulations designed for the disposal of commercial reprocessing waste [3,4] and zeolites which are heavily loaded with Cs [5,6].
Midcontinental Journal of Archaeology, 2004
RefDoc Bienvenue - Welcome. Refdoc est un service / is powered by. ...
One of the leading candidate waste forms for disposal of commercial high level nuclear waste is g... more One of the leading candidate waste forms for disposal of commercial high level nuclear waste is glass. This waste form has received a great deal of attention over the past twenty years of development. Alteration of this waste form in the presence of mild hydrothermal solutions, which might be anticipated during the first several hundred years after emplacement of the waste into a geological repository, was shown (1) to be extensive at 300°C. These stability experiments, however, were conducted in a closed static hydrothermal system with the waste form and deionized water alone.
American Mineralogist, 1989
Advances in X-Ray Analysis, 1981
Accurate phase characterization of the alteration products of rad-waste requires the separation a... more Accurate phase characterization of the alteration products of rad-waste requires the separation and identification of scattered individual grains from among the bulk product. These grains are typically 5 to 100 μm in size. Bulk x-ray powder diffraction will normally not detect these minor phases, and even if the phase can be detected, it often may not be identifiable. The use of the Gandolfi technique with the individual particle not only facilitates the identification, but also allows the assignment of the identification to the specific grain.