The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform

Kay Wille - One of the best experts on this subject based on the ideXlab platform.

  • influence of fiber volume fraction and fiber orientation on the uniaxial tensile behavior of reBar reinforced ultra high performance concrete
    Fibers, 2019
    Co-Authors: Manish Roy, Corey Hollmann, Kay Wille
    Abstract:

    This paper studied the influence of fiber volume fraction ( V f ), fiber orientation, and type of Reinforcement Bar (reBar) on the uniaxial tensile behavior of reBar-reinforced strain-hardening ultra-high performance concrete (UHPC). It was observed that the tensile strength increased with the increase in V f . When V f was kept constant at 1%, reBar-reinforced UHPC with fibers aligned with the load direction registered the highest strength and that with fibers oriented perpendicular to the load direction recorded the lowest strength. The strength of the composite with random fibers laid in between. Moreover, the strength, as well as the ductility, increased when the normal strength grade 60 reBars embedded in UHPC were replaced with high strength grade 100 reBars with all other conditions remaining unchanged. In addition, this paper discusses the potential of sudden failure of reBar-reinforced strain hardening UHPC and it is suggested that the composite attains a minimum strain of 1% at the peak stress to enable the members to have sufficient ductility.

  • Influence of volume fraction and orientation of fibers on the pullout behavior of Reinforcement Bar embedded in ultra high performance concrete
    Construction and Building Materials, 2017
    Co-Authors: Manish Roy, Corey Hollmann, Kay Wille
    Abstract:

    Abstract An experimental investigation was carried out to evaluate the effect of fiber volume fraction (Vf) and fiber orientation on the pullout behavior of steel Reinforcement Bar embedded in Ultra High Performance Concrete (UHPC). The experiments were performed using pullout specimens under tensile stresses and low concrete cover. It was found that the peak pullout load increased with the increase in Vf. When Vf was kept constant at 2%, it was observed that the specimens with perpendicular and parallel fiber orientation with respect to the reBar direction recorded the highest and the lowest pullout load, respectively. Finally, an empirical model equation was developed to predict the bond strength values.

Manish Roy - One of the best experts on this subject based on the ideXlab platform.

  • influence of fiber volume fraction and fiber orientation on the uniaxial tensile behavior of reBar reinforced ultra high performance concrete
    Fibers, 2019
    Co-Authors: Manish Roy, Corey Hollmann, Kay Wille
    Abstract:

    This paper studied the influence of fiber volume fraction ( V f ), fiber orientation, and type of Reinforcement Bar (reBar) on the uniaxial tensile behavior of reBar-reinforced strain-hardening ultra-high performance concrete (UHPC). It was observed that the tensile strength increased with the increase in V f . When V f was kept constant at 1%, reBar-reinforced UHPC with fibers aligned with the load direction registered the highest strength and that with fibers oriented perpendicular to the load direction recorded the lowest strength. The strength of the composite with random fibers laid in between. Moreover, the strength, as well as the ductility, increased when the normal strength grade 60 reBars embedded in UHPC were replaced with high strength grade 100 reBars with all other conditions remaining unchanged. In addition, this paper discusses the potential of sudden failure of reBar-reinforced strain hardening UHPC and it is suggested that the composite attains a minimum strain of 1% at the peak stress to enable the members to have sufficient ductility.

  • Influence of volume fraction and orientation of fibers on the pullout behavior of Reinforcement Bar embedded in ultra high performance concrete
    Construction and Building Materials, 2017
    Co-Authors: Manish Roy, Corey Hollmann, Kay Wille
    Abstract:

    Abstract An experimental investigation was carried out to evaluate the effect of fiber volume fraction (Vf) and fiber orientation on the pullout behavior of steel Reinforcement Bar embedded in Ultra High Performance Concrete (UHPC). The experiments were performed using pullout specimens under tensile stresses and low concrete cover. It was found that the peak pullout load increased with the increase in Vf. When Vf was kept constant at 2%, it was observed that the specimens with perpendicular and parallel fiber orientation with respect to the reBar direction recorded the highest and the lowest pullout load, respectively. Finally, an empirical model equation was developed to predict the bond strength values.

Manish K Dixit - One of the best experts on this subject based on the ideXlab platform.

  • punching above its weight life cycle energy accounting and environmental assessment of vanadium microalloying in Reinforcement Bar steel
    Environmental Science: Processes & Impacts, 2021
    Co-Authors: Pranav Pradeep Kumar, David A Santos, Erick J Braham, Diane G Sellers, Sarbajit Banerjee, Manish K Dixit
    Abstract:

    Steel-reinforced concrete is ubiquitously used in construction across the world. The United Nations estimates that the worldwide energy consumption of buildings accounts for 30–40% of global energy production, underlining the importance of the judicious selection of construction materials. Much effort has focused on the use of high-strength low-alloy steels in Reinforcement Bars whose economy of materials use is predicated upon improved yield strengths in comparison to low-carbon steels. While microalloying is known to allow for reduced steel consumption, a sustainability analysis in terms of embodied energy and CO2 has not thus far been performed. Here we calculate the impact of supplanting lower grade Reinforcement Bars with higher strength vanadium microalloyed steels on embodied energy and carbon footprint. We find that the increased strength of vanadium microalloyed steel translates into substantial material savings over mild steel, thereby reducing the total global fossil carbon footprint by as much as 0.385%. A more granular analysis pegs savings for China and the European Union at 1.01 and 0.19%, respectively, of their respective emissions. Our cradle-to-gate analysis provides an accounting of the role of microalloying in reducing the carbon footprint of the steel and construction industries and highlights the underappreciated role of alloying elements.

  • punching above its weight life cycle energy accounting and environmental assessment of vanadium microalloying in Reinforcement Bar steel
    ChemRxiv, 2020
    Co-Authors: Pranav Pradeep Kumar, David A Santos, Erick J Braham, Diane G Sellers, Sarbajit Banerjee, Manish K Dixit
    Abstract:

    The manuscript presents a detailed analysis of embodied energy and carbon footprint reduction enabled by microalloying of steel, thereby providing a rich global perspective of the (outsized) role of chemical elements added in trace concentrations on the overall footprint of the construction industry. As such, the manuscript addresses an important and timely topic at the intersection of materials criticality, structural performance, life cycle assessment, and policy interventions. The United Nations estimates that the worldwide energy consumption of buildings accounts for 30—40% of global energy production, underlining the importance of the judicious selection of construction materials. Much effort has focused on the use of high-strength low-alloy steels in Reinforcement Bars whose economy of materials use is predicated upon improved yield strengths in comparison to low-carbon steels. While microalloying is known to allow for reduced steel consumption, a sustainability analysis in terms of embodied energy and CO 2 has not thus far been performed. Here we calculate the impact of supplanting lower grade Reinforcement Bars with higher strength vanadium microalloyed steels on embodied energy and carbon footprint. We find that the increased strength of vanadium microalloyed steel translates into substantial material savings over mild steel thus reducing the total global fossil carbon footprint by as much as 0.385%. A more granular analysis pegs savings for China and the European Union at 1.01 and 0.19%, respectively, of their respective emissions.

Corey Hollmann - One of the best experts on this subject based on the ideXlab platform.

  • influence of fiber volume fraction and fiber orientation on the uniaxial tensile behavior of reBar reinforced ultra high performance concrete
    Fibers, 2019
    Co-Authors: Manish Roy, Corey Hollmann, Kay Wille
    Abstract:

    This paper studied the influence of fiber volume fraction ( V f ), fiber orientation, and type of Reinforcement Bar (reBar) on the uniaxial tensile behavior of reBar-reinforced strain-hardening ultra-high performance concrete (UHPC). It was observed that the tensile strength increased with the increase in V f . When V f was kept constant at 1%, reBar-reinforced UHPC with fibers aligned with the load direction registered the highest strength and that with fibers oriented perpendicular to the load direction recorded the lowest strength. The strength of the composite with random fibers laid in between. Moreover, the strength, as well as the ductility, increased when the normal strength grade 60 reBars embedded in UHPC were replaced with high strength grade 100 reBars with all other conditions remaining unchanged. In addition, this paper discusses the potential of sudden failure of reBar-reinforced strain hardening UHPC and it is suggested that the composite attains a minimum strain of 1% at the peak stress to enable the members to have sufficient ductility.

  • Influence of volume fraction and orientation of fibers on the pullout behavior of Reinforcement Bar embedded in ultra high performance concrete
    Construction and Building Materials, 2017
    Co-Authors: Manish Roy, Corey Hollmann, Kay Wille
    Abstract:

    Abstract An experimental investigation was carried out to evaluate the effect of fiber volume fraction (Vf) and fiber orientation on the pullout behavior of steel Reinforcement Bar embedded in Ultra High Performance Concrete (UHPC). The experiments were performed using pullout specimens under tensile stresses and low concrete cover. It was found that the peak pullout load increased with the increase in Vf. When Vf was kept constant at 2%, it was observed that the specimens with perpendicular and parallel fiber orientation with respect to the reBar direction recorded the highest and the lowest pullout load, respectively. Finally, an empirical model equation was developed to predict the bond strength values.

Pranav Pradeep Kumar - One of the best experts on this subject based on the ideXlab platform.

  • punching above its weight life cycle energy accounting and environmental assessment of vanadium microalloying in Reinforcement Bar steel
    Environmental Science: Processes & Impacts, 2021
    Co-Authors: Pranav Pradeep Kumar, David A Santos, Erick J Braham, Diane G Sellers, Sarbajit Banerjee, Manish K Dixit
    Abstract:

    Steel-reinforced concrete is ubiquitously used in construction across the world. The United Nations estimates that the worldwide energy consumption of buildings accounts for 30–40% of global energy production, underlining the importance of the judicious selection of construction materials. Much effort has focused on the use of high-strength low-alloy steels in Reinforcement Bars whose economy of materials use is predicated upon improved yield strengths in comparison to low-carbon steels. While microalloying is known to allow for reduced steel consumption, a sustainability analysis in terms of embodied energy and CO2 has not thus far been performed. Here we calculate the impact of supplanting lower grade Reinforcement Bars with higher strength vanadium microalloyed steels on embodied energy and carbon footprint. We find that the increased strength of vanadium microalloyed steel translates into substantial material savings over mild steel, thereby reducing the total global fossil carbon footprint by as much as 0.385%. A more granular analysis pegs savings for China and the European Union at 1.01 and 0.19%, respectively, of their respective emissions. Our cradle-to-gate analysis provides an accounting of the role of microalloying in reducing the carbon footprint of the steel and construction industries and highlights the underappreciated role of alloying elements.

  • punching above its weight life cycle energy accounting and environmental assessment of vanadium microalloying in Reinforcement Bar steel
    ChemRxiv, 2020
    Co-Authors: Pranav Pradeep Kumar, David A Santos, Erick J Braham, Diane G Sellers, Sarbajit Banerjee, Manish K Dixit
    Abstract:

    The manuscript presents a detailed analysis of embodied energy and carbon footprint reduction enabled by microalloying of steel, thereby providing a rich global perspective of the (outsized) role of chemical elements added in trace concentrations on the overall footprint of the construction industry. As such, the manuscript addresses an important and timely topic at the intersection of materials criticality, structural performance, life cycle assessment, and policy interventions. The United Nations estimates that the worldwide energy consumption of buildings accounts for 30—40% of global energy production, underlining the importance of the judicious selection of construction materials. Much effort has focused on the use of high-strength low-alloy steels in Reinforcement Bars whose economy of materials use is predicated upon improved yield strengths in comparison to low-carbon steels. While microalloying is known to allow for reduced steel consumption, a sustainability analysis in terms of embodied energy and CO 2 has not thus far been performed. Here we calculate the impact of supplanting lower grade Reinforcement Bars with higher strength vanadium microalloyed steels on embodied energy and carbon footprint. We find that the increased strength of vanadium microalloyed steel translates into substantial material savings over mild steel thus reducing the total global fossil carbon footprint by as much as 0.385%. A more granular analysis pegs savings for China and the European Union at 1.01 and 0.19%, respectively, of their respective emissions.