Journal ArticleDOI
Bonding behavior between reactive powder concrete and normal strength concrete
TLDR
In order to investigate the bonding behavior between reactive powder concrete (RPC) and normal strength concrete (NSC), splitting tensile test of 81 specimens and double shear test of 27 specimens were conducted, the effects of water-to-binder ratio (W/B) of RPC, steel fibre volume fraction, and interfacial roughness on RPC-NSC bonding were investigated as mentioned in this paper.About:
This article is published in Construction and Building Materials.The article was published on 2020-05-10. It has received 110 citations till now. The article focuses on the topics: Shear strength & Ultimate tensile strength.read more
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Effect of hybrid coaxial air and hydrogen jets on fuel mixing at supersonic crossflow
TL;DR: In this article, a computational method is applied to examine the impacts of coaxial hybrid air and fuel jets on fuel mixing at the supersonic cross-flow of Mach = 4.
Journal ArticleDOI
Mixing efficiency of hydrogen multijet through backward-facing steps at supersonic flow
TL;DR: In this paper, the impact of step height on the jet features and circulation of jets in different sections of the combustor at downstream of the multi-injectors was analyzed.
Journal ArticleDOI
The effect of graphite and slag on electrical and mechanical properties of electrically conductive cementitious composites
Junbo Sun,Sen Lin,Genbao Zhang,Yuantian Sun,Junfei Zhang,Changfu Chen,Amr M. Morsy,Amr M. Morsy,Xiangyu Wang +8 more
TL;DR: In this paper, the impact of graphite and slag on the electrical and mechanical behaviors of ECCCs was investigated, and the best results could be obtained with optimized contents of steel slag, blast furnace slag and graphite.
Journal ArticleDOI
Comparative studies of the effect of ultrahigh-performance concrete and normal concrete as repair materials on interfacial bond properties and microstructure
Feng Shuo,Huigang Xiao,Hui Li +2 more
TL;DR: In this paper, the effects of repair materials such as ultra high performance concrete (UHPC) and normal concrete (NC) on the bond performance and microstructure between a concrete substrate and the repair materials were investigated.
Journal ArticleDOI
Combined effect of using porous media and nano-particle on melting performance of PCM filled enclosure with triangular double fins
Shu-Bo Chen,Salman Saleem,Mohammed N. Alghamdi,Kottakkaran Sooppy Nisar,Akbar Arsalanloo,Alibek Issakhov,Alibek Issakhov,Wei-Feng Xia +7 more
TL;DR: In this paper, a vertically oriented rectangular-shaped enclosure with triangular shaped double fins filled with PCM was considered as a Latent Thermal Energy Storage (LTES) system, and nine different cases including one pure PCM, three nano-PCM having different volume fractions, two porous and three nano/porous PCM were considered to conduct the investigation.
References
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Journal ArticleDOI
The modified compression-field theory for reinforced concrete elements subjected to shear
Journal ArticleDOI
Composition of reactive powder concretes
Pierre Richard,Marcel Cheyrezy +1 more
TL;DR: In this paper, the authors developed an ultra-high strength ductile concrete designated RPC (Reactive Powder Concrete), which was made possible by the application of a certain number of basic principles relating to the composition, mixing and post set heat curing of the concrete.
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Mechanical and permeability properties of the interface between normal concrete substrate and ultra high performance fiber concrete overlay
TL;DR: In this paper, the authors examined experimentally the mechanical properties and permeability characteristics of the interface between normal concrete (NC) substrate which represents old concrete structures and an overlay of ultra high performance fiber concrete (UHPFC) as a repair material.
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Material and bond properties of ultra high performance fiber reinforced concrete with micro steel fibers
Abstract: For investigating the effect of fiber content on the material and interfacial bond properties of ultra high performance fiber reinforced concrete (UHPFRC), four different volume ratios of micro steel fibers (Vf = 1%, 2%, 3%, and 4%) were used within an identical mortar matrix. Test results showed that 3% steel fiber by volume yielded the best performance in terms of compressive strength, elastic modulus, shrinkage behavior, and interfacial bond strength. These parameters improved as the fiber content was increased up to 3 vol.%. Flexural behaviors such as flexural strength, deflection, and crack mouth opening displacement at peak load had pseudo-linear relationships with the fiber content. Through inverse analysis, it was shown that fracture parameters including cohesive stress and fracture energy are significantly influenced by the fiber content: higher cohesive stress and fracture energy were achieved with higher fiber content. The analytical models for the ascending branch of bond stress-slip response suggested in the literature were considered for UHPFRC, and appropriate parameters were derived from the present test data.
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Fiber synergy in Hybrid Fiber Reinforced Concrete (HyFRC) in flexure and direct shear
TL;DR: In this article, the influence of load configuration on fiber synergy was analyzed under flexure and direct shear tests, and the results were analyzed to identify synergy, if any, associated with various fiber combinations.