The Experts below are selected from a list of 29859 Experts worldwide ranked by ideXlab platform
Hilde Lea Lein - One of the best experts on this subject based on the ideXlab platform.
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application of nanoindentation testing to study of the interfacial transition zone in Steel Fiber reinforced mortar
Cement and Concrete Research, 2009Co-Authors: Xiaohui Wang, Stefan Jacobsen, Zhiliang Zhang, Siaw Foon Lee, Hilde Lea LeinAbstract:The characteristics of the profiles of elastic modulus and hardness of the Steel Fiber-matrix and Fiber-matrix-aggregate interfacial zones in Steel Fiber reinforced mortars have been investigated by using nanoindentation and Scanning Electron Microscopy (SEM), where two sets of parameters, i.e. water/binder ratio and content of silica fume were considered. Different interfacial bond conditions in the interfacial transition zones (ITZ) are discussed. For sample without silica fume, efficient interfacial bonds across the Steel Fiber-matrix and Fiber-matrix-aggregate interfaces are shown in low water/binder ratio mortar; while in high water/binder ratio mortar, due to the discontinuous bleeding voids underneath the Fiber, the Fiber-matrix bond is not very good. On the other hand, for sample with silica fume, the addition of 10% silica fume leads to no distinct presence of weak ITZ in the Steel Fiber-matrix interface; but the effect of the silica fume on the Steel Fiber-matrix-aggregate interfacial zone is not obvious due to voids in the vicinity of Steel Fiber.
Thomas A Bier - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of Steel Fiber reinforced high strength lightweight self compacting concrete shlscc
Construction and Building Materials, 2015Co-Authors: Shahid Iqbal, Ahsan Ali, Klaus Holschemacher, Thomas A BierAbstract:With addition of Steel Fibers to concrete, its properties are altered from brittle to ductile. Using lightweight concrete enables decrease in additional loads while self-compacted concrete avoids use of vibrators for concrete compaction, in case of renovation or/strengthening of existing structures. This study is aimed at investigating the effect of change in micro Steel Fiber content on the properties of Steel Fiber reinforced high strength lightweight self-compacting concrete (SHLSCC). Slump flow test was conducted to find the workability of fresh concrete mixture. Further compressive strength, splitting tensile strength, modulus of elasticity and flexural strength of hardened concrete were tested. Five concrete mixes of SHLSCC with different Fiber contents (0%, 0.5%, 0.75%, 1% and 1.25%) were prepared to study the change in its fresh and hardened properties. Results show that there is strong influence on the workability of SHLSCC with Steel Fiber content of 1% or more. There is around 12% reduction in compressive strength, 37% and 110% increase in splitting tensile strength and flexural strength respectively, with increase of Steel Fiber content from 0% to 1.25%, while the modulus of elasticity remains unchanged.
R. Jayaganthan - One of the best experts on this subject based on the ideXlab platform.
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Development and characterization of stainless Steel Fiber-based copper-free brake liner formulation—A positive solution for Steel Fiber replacement
Friction, 2019Co-Authors: Ramakrishnan Vijay, D. Lenin Singaravelu, R. JayaganthanAbstract:This study is on the development of drum brake liner for a multi-utility vehicle possessing a hydraulic brake system. The approach adopted was to vary seven weight percent in each friction composite formulation between Steel Fiber and stainless Steel Fiber. The friction composites developed were tested for physical, chemical, corrosive, mechanical, and thermal properties as well as tribological characteristics under near-actual conditions using an inertia dynamometer as per industrial standards. ANSYS analysis was performed to obtain the thermal stress distributions of the developed friction composites at maximum temperature rise during brake stops, and an extensive evaluation method was used to rank the composites. The study concludes that the brake factor of stainless Steel Fiber-based friction composites produce stable performance under all conditions, with a low liner temperature rise of 340°C and low thermal stresses (4.255294 MPa). In contrast, friction composites based on Steel Fiber initially deliver high performance, which deteriorate after a certain period due to high corrosion levels and a high temperature rise of 361°C, resulting in negative fade (−0.84%) and high thermal stresses (5.619102 MPa). The primary plateaus, secondary plateaus, back transfer of drum wear debris, and distribution of constituents on the worn surface of the developed composites’ resin matrix were identified and studied using a scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS).
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Development and characterization of stainless Steel Fiber-based copper-free brake liner formulation: A positive solution for Steel Fiber replacement
Friction, 2019Co-Authors: Ritu Vijay, Ramakrishnan Vijay, D. Lenin Singaravelu, R. JayaganthanAbstract:This study deals with the development of drum brake liner for a multi-utility vehicle possessing a hydraulic brake system by varying 7 weight % of Steel Fiber and stainless Steel Fiber each, in friction composite formulations. The developed friction composites were tested for physical, chemical, corrosion, mechanical, thermal properties, and tribological characteristics, under near-actual conditions using an inertia dynamometer as per industrial standards. Finite element analysis software (ANSYS) analysis was performed to show the thermal stress distribution of the developed friction composites at the maximum temperature rise due to heat generated during brake stops, and an extensive evaluation method was used to rank the composites. The study concludes that the brake factor of the stainless Steel Fiber-based friction composite produces stable performance in all conditions with a lower liner temperature rise of 340 °C and lower thermal stress at 4.255294 MPa. However, the Steel Fiber-based composites produced high performance at the beginning but deteriorated after a certain period due to higher levels of corrosion and a high temperature rise of 361 °C resulting in a negative fade (−0.84%) and more thermal stress (5.619102 MPa). The primary plateau, secondary plateau, back transfer of drum wear debris, and the distribution of constituents on the worn surface of the developed composites in a resin matrix were identified and studied using a scanning electron microscope (SEM) equipped with energy-dispersive spectroscopy.
Xiaohui Wang - One of the best experts on this subject based on the ideXlab platform.
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application of nanoindentation testing to study of the interfacial transition zone in Steel Fiber reinforced mortar
Cement and Concrete Research, 2009Co-Authors: Xiaohui Wang, Stefan Jacobsen, Zhiliang Zhang, Siaw Foon Lee, Hilde Lea LeinAbstract:The characteristics of the profiles of elastic modulus and hardness of the Steel Fiber-matrix and Fiber-matrix-aggregate interfacial zones in Steel Fiber reinforced mortars have been investigated by using nanoindentation and Scanning Electron Microscopy (SEM), where two sets of parameters, i.e. water/binder ratio and content of silica fume were considered. Different interfacial bond conditions in the interfacial transition zones (ITZ) are discussed. For sample without silica fume, efficient interfacial bonds across the Steel Fiber-matrix and Fiber-matrix-aggregate interfaces are shown in low water/binder ratio mortar; while in high water/binder ratio mortar, due to the discontinuous bleeding voids underneath the Fiber, the Fiber-matrix bond is not very good. On the other hand, for sample with silica fume, the addition of 10% silica fume leads to no distinct presence of weak ITZ in the Steel Fiber-matrix interface; but the effect of the silica fume on the Steel Fiber-matrix-aggregate interfacial zone is not obvious due to voids in the vicinity of Steel Fiber.
Jianan Xu - One of the best experts on this subject based on the ideXlab platform.
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load transfer mechanism and bond stress components in Steel and Steel Fiber reinforced concrete structure
Journal of Structural Engineering-asce, 2019Co-Authors: Kai Wu, Huiming Zheng, Chuyang Chen, Feng Chen, Jianan XuAbstract:AbstractIn order to solve difficulties in the construction of composite Steel-reinforced concrete structures, the rebar cage is replaced with Steel Fiber to form a Steel and Steel Fiber–reinforced ...
