The Experts below are selected from a list of 151806 Experts worldwide ranked by ideXlab platform
F Moreno - One of the best experts on this subject based on the ideXlab platform.
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the effect of crumb rubber modifier on the resistance of asphalt mixes to plastic deformation
Materials & Design, 2013Co-Authors: F Moreno, J Martin, M Perez, M C RubioAbstract:Abstract This research analyzed the response of bituminous mixes manufactured with rubber to plastic deformation. For this purpose, a set of asphalt mixes containing different percentages of crumb rubber modifier (CRM) added by the Dry Process as well as the wet Process were tested. It also compared the performance of a CRM mix to that of a mix made with high-performance polymer-modified bitumen. The mixes were assessed with the wheel-tracking test and the cyclic triaxial test. Their bearing capacity was also evaluated by determining their stiffness modulus at different temperatures. The results obtained showed that for the dosages and percentages of crumb rubber used, the addition of wet-Process and Dry-Process CRM to asphalt mixes with conventional bitumen increased their resistance to plastic deformation. In fact, the performance of some CRM mixes was superior to that of the mix with high-performance modified bitumen. It also increased their stiffness modulus and creep modulus values and improved their resistance to plastic deformations caused by vehicle traffic loads.
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the mechanical performance of Dry Process crumb rubber modified hot bituminous mixes the influence of digestion time and crumb rubber percentage
Construction and Building Materials, 2012Co-Authors: F Moreno, M C Rubio, M J MartinezechevarriaAbstract:Abstract The use of crumb rubber from scrap tires in hot bituminous mixes in order to improve their performance has become a technique of great potential in recent years. The two techniques used to add crumb rubber to bituminous mixes are the wet Process and the Dry Process. Of the two, the Dry Process is somewhat less popular because it initially produced poorer results. The objective of the research presented in this paper is to improve the application of this technique by analyzing the influence of the variables digestion time and percentage of crumb rubber on the mechanical performance of bituminous mixes. This research project had two phases. The first phase studied the influence of these variables on the mix design, whereas the second phase analyzed how the variables affected the mechanical performance of the mixes. This paper presents the results of the second phase which analyzed the mechanical performance of Dry-Process crumb rubber mixes, more specifically, their response to moisture sensitivity and plastic deformations. The results obtained indicated that the determining factor in mix performance was the amount of crumb rubber added. In contrast, the influence of digestion time was found to be negligible. The study showed that in reference to moisture sensitivity and plastic deformations, the best performances were achieved with a digestion time of 45 min and a crumb rubber percentage of 0.5% and 1.0% of the total weight of the mix.
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Analysis of digestion time and the crumb rubber percentage in Dry-Process crumb rubber modified hot bituminous mixes
Construction and Building Materials, 2011Co-Authors: F Moreno, M C Rubio, M.j. Martinez-echevarriaAbstract:Abstract The use of crumb rubber modifier (CRM) in bituminous mixes made by the Dry Process is not as widely used as the wet Process. Nonetheless, this Process has advantages, such as the potential to consume larger quantities of crumb rubber, thus resulting in greater savings in energy and natural resources. This research study contributes to the further development and evolution of the Dry Process through the analysis of the effect of the digestion time (the contact time between the crumb rubber and the bitumen) and the quantity of crumb rubber on the mix design properties. The results of the study showed that the digestion time had no influence on the selection of the optimal binder content or on the compaction of the mixture. In contrast, the digestion time was found to have an impact on the mechanical performance of the mix. In this respect, an increase in the quantity of crumb rubber contributed to a corresponding increase in the amount of bitumen needed, and also caused the mix to become less compact. This study showed that a crumb rubber percentage of less than 1% of the total weight of the mix and a digestion time of 90 min produced the best results.
M C Rubio - One of the best experts on this subject based on the ideXlab platform.
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the effect of crumb rubber modifier on the resistance of asphalt mixes to plastic deformation
Materials & Design, 2013Co-Authors: F Moreno, J Martin, M Perez, M C RubioAbstract:Abstract This research analyzed the response of bituminous mixes manufactured with rubber to plastic deformation. For this purpose, a set of asphalt mixes containing different percentages of crumb rubber modifier (CRM) added by the Dry Process as well as the wet Process were tested. It also compared the performance of a CRM mix to that of a mix made with high-performance polymer-modified bitumen. The mixes were assessed with the wheel-tracking test and the cyclic triaxial test. Their bearing capacity was also evaluated by determining their stiffness modulus at different temperatures. The results obtained showed that for the dosages and percentages of crumb rubber used, the addition of wet-Process and Dry-Process CRM to asphalt mixes with conventional bitumen increased their resistance to plastic deformation. In fact, the performance of some CRM mixes was superior to that of the mix with high-performance modified bitumen. It also increased their stiffness modulus and creep modulus values and improved their resistance to plastic deformations caused by vehicle traffic loads.
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the mechanical performance of Dry Process crumb rubber modified hot bituminous mixes the influence of digestion time and crumb rubber percentage
Construction and Building Materials, 2012Co-Authors: F Moreno, M C Rubio, M J MartinezechevarriaAbstract:Abstract The use of crumb rubber from scrap tires in hot bituminous mixes in order to improve their performance has become a technique of great potential in recent years. The two techniques used to add crumb rubber to bituminous mixes are the wet Process and the Dry Process. Of the two, the Dry Process is somewhat less popular because it initially produced poorer results. The objective of the research presented in this paper is to improve the application of this technique by analyzing the influence of the variables digestion time and percentage of crumb rubber on the mechanical performance of bituminous mixes. This research project had two phases. The first phase studied the influence of these variables on the mix design, whereas the second phase analyzed how the variables affected the mechanical performance of the mixes. This paper presents the results of the second phase which analyzed the mechanical performance of Dry-Process crumb rubber mixes, more specifically, their response to moisture sensitivity and plastic deformations. The results obtained indicated that the determining factor in mix performance was the amount of crumb rubber added. In contrast, the influence of digestion time was found to be negligible. The study showed that in reference to moisture sensitivity and plastic deformations, the best performances were achieved with a digestion time of 45 min and a crumb rubber percentage of 0.5% and 1.0% of the total weight of the mix.
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Analysis of digestion time and the crumb rubber percentage in Dry-Process crumb rubber modified hot bituminous mixes
Construction and Building Materials, 2011Co-Authors: F Moreno, M C Rubio, M.j. Martinez-echevarriaAbstract:Abstract The use of crumb rubber modifier (CRM) in bituminous mixes made by the Dry Process is not as widely used as the wet Process. Nonetheless, this Process has advantages, such as the potential to consume larger quantities of crumb rubber, thus resulting in greater savings in energy and natural resources. This research study contributes to the further development and evolution of the Dry Process through the analysis of the effect of the digestion time (the contact time between the crumb rubber and the bitumen) and the quantity of crumb rubber on the mix design properties. The results of the study showed that the digestion time had no influence on the selection of the optimal binder content or on the compaction of the mixture. In contrast, the digestion time was found to have an impact on the mechanical performance of the mix. In this respect, an increase in the quantity of crumb rubber contributed to a corresponding increase in the amount of bitumen needed, and also caused the mix to become less compact. This study showed that a crumb rubber percentage of less than 1% of the total weight of the mix and a digestion time of 90 min produced the best results.
Jose Alberto Fracassi Da Silva - One of the best experts on this subject based on the ideXlab platform.
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a Dry Process for production of microfluidic devices based on the lamination of laser printed polyester films
Analytical Chemistry, 2003Co-Authors: Claudimir Lucio Do Lago, Heron Dominguez Torres Da Silva, And Carlos Antonio Neves, Jose Geraldo Alves Britoneto, Jose Alberto Fracassi Da SilvaAbstract:A new microfabrication Process based on a xerographic Process is described. A laser printer is used to selectively deposit toner on a polyester film, which is subsequently laminated against another polyester film. The toner layer binds the two polyester films and allows the blank regions to become channels for microfluidics. These software-outlined channels are ∼6 μm deep. Approximately twice this depth is obtained by laminating two printed films. The resulting devices were not significantly damaged after 24 h of exposure to aqueous solutions of H3PO4, NaOH, methanol, acetonitrile, or sodium dodecyl sulfate. Electric tests with an impedance analyzer and microchannels filled with KCl solution demonstrated that (1) wide channels suffer from deformation of the top and bottom walls due to the lamination of the polyester films and (2) the toner walls are somewhat porous. Although these drawbacks limit the maximum width of a channel and the minimum distance between two channels, the Process is an attractive opt...
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a Dry Process for production of microfluidic devices based on the lamination of laser printed polyester films
Analytical Chemistry, 2003Co-Authors: Claudimir Lucio Do Lago, Heron Dominguez Torres Da Silva, And Carlos Antonio Neves, Jose Geraldo Alves Britoneto, Jose Alberto Fracassi Da SilvaAbstract:A new microfabrication Process based on a xerographic Process is described. A laser printer is used to selectively deposit toner on a polyester film, which is subsequently laminated against another polyester film. The toner layer binds the two polyester films and allows the blank regions to become channels for microfluidics. These software-outlined channels are ∼6 μm deep. Approximately twice this depth is obtained by laminating two printed films. The resulting devices were not significantly damaged after 24 h of exposure to aqueous solutions of H3PO4, NaOH, methanol, acetonitrile, or sodium dodecyl sulfate. Electric tests with an impedance analyzer and microchannels filled with KCl solution demonstrated that (1) wide channels suffer from deformation of the top and bottom walls due to the lamination of the polyester films and (2) the toner walls are somewhat porous. Although these drawbacks limit the maximum width of a channel and the minimum distance between two channels, the Process is an attractive opt...
M.j. Martinez-echevarria - One of the best experts on this subject based on the ideXlab platform.
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Analysis of digestion time and the crumb rubber percentage in Dry-Process crumb rubber modified hot bituminous mixes
Construction and Building Materials, 2011Co-Authors: F Moreno, M C Rubio, M.j. Martinez-echevarriaAbstract:Abstract The use of crumb rubber modifier (CRM) in bituminous mixes made by the Dry Process is not as widely used as the wet Process. Nonetheless, this Process has advantages, such as the potential to consume larger quantities of crumb rubber, thus resulting in greater savings in energy and natural resources. This research study contributes to the further development and evolution of the Dry Process through the analysis of the effect of the digestion time (the contact time between the crumb rubber and the bitumen) and the quantity of crumb rubber on the mix design properties. The results of the study showed that the digestion time had no influence on the selection of the optimal binder content or on the compaction of the mixture. In contrast, the digestion time was found to have an impact on the mechanical performance of the mix. In this respect, an increase in the quantity of crumb rubber contributed to a corresponding increase in the amount of bitumen needed, and also caused the mix to become less compact. This study showed that a crumb rubber percentage of less than 1% of the total weight of the mix and a digestion time of 90 min produced the best results.
Claudimir Lucio Do Lago - One of the best experts on this subject based on the ideXlab platform.
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a Dry Process for production of microfluidic devices based on the lamination of laser printed polyester films
Analytical Chemistry, 2003Co-Authors: Claudimir Lucio Do Lago, Heron Dominguez Torres Da Silva, And Carlos Antonio Neves, Jose Geraldo Alves Britoneto, Jose Alberto Fracassi Da SilvaAbstract:A new microfabrication Process based on a xerographic Process is described. A laser printer is used to selectively deposit toner on a polyester film, which is subsequently laminated against another polyester film. The toner layer binds the two polyester films and allows the blank regions to become channels for microfluidics. These software-outlined channels are ∼6 μm deep. Approximately twice this depth is obtained by laminating two printed films. The resulting devices were not significantly damaged after 24 h of exposure to aqueous solutions of H3PO4, NaOH, methanol, acetonitrile, or sodium dodecyl sulfate. Electric tests with an impedance analyzer and microchannels filled with KCl solution demonstrated that (1) wide channels suffer from deformation of the top and bottom walls due to the lamination of the polyester films and (2) the toner walls are somewhat porous. Although these drawbacks limit the maximum width of a channel and the minimum distance between two channels, the Process is an attractive opt...
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a Dry Process for production of microfluidic devices based on the lamination of laser printed polyester films
Analytical Chemistry, 2003Co-Authors: Claudimir Lucio Do Lago, Heron Dominguez Torres Da Silva, And Carlos Antonio Neves, Jose Geraldo Alves Britoneto, Jose Alberto Fracassi Da SilvaAbstract:A new microfabrication Process based on a xerographic Process is described. A laser printer is used to selectively deposit toner on a polyester film, which is subsequently laminated against another polyester film. The toner layer binds the two polyester films and allows the blank regions to become channels for microfluidics. These software-outlined channels are ∼6 μm deep. Approximately twice this depth is obtained by laminating two printed films. The resulting devices were not significantly damaged after 24 h of exposure to aqueous solutions of H3PO4, NaOH, methanol, acetonitrile, or sodium dodecyl sulfate. Electric tests with an impedance analyzer and microchannels filled with KCl solution demonstrated that (1) wide channels suffer from deformation of the top and bottom walls due to the lamination of the polyester films and (2) the toner walls are somewhat porous. Although these drawbacks limit the maximum width of a channel and the minimum distance between two channels, the Process is an attractive opt...
