Key parameters in optimizing fibres orientation and distribution for Ultra-High Performance Fibre Reinforced Concrete (UHPFRC)

Song, Qiulei; Yu, Rui; Shui, Zhonghe; Wang, Xinpeng; Rao, Suduan; Lin, Zewen; Wang, Zhe

doi:10.1016/j.conbuildmat.2018.08.102

Cited by 42 publications

(15 citation statements)

References 44 publications

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“…As tensile stresses increase, either the bond between fibers and concrete breaks gradually until bond pull-out failure or the fiber ruptures when tensile stress exceeds its tensile strength [57]. The orientation of fibers and dispersal are two factors that can have a profound effect on the impact resistance of fibrous hammerhead concrete beams, consequently influenced by mixing method, casting technique, and beam/ specimen dimensions [58][59][60][61][62]. The impact energy results are shown in Fig.…”

Section: Experimental Results Of Repeated Impact Test 61 Impact Resumentioning

confidence: 99%

Impact Response of Hammerhead Pier Fibrous Concrete Beams Designed with Topology Optimization

Salaimanimagudam

Suribabu

Murali

et al. 2020

Period. Polytech. Civil Eng.

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Reducing the weight of concrete beams is a primary (beyond strength and durability) concern of engineers. Therefore, this research was directed to investigate the impact response of hammerhead pier concrete beams designed with density-based method topology optimization. The finite element topology optimization was conducted using Autodesk fusion 360 considering three different mesh sizes of 7 mm, 10 mm, and adaptive meshing. Three optimized hammerhead beam configurations; HB1, HB2, and HB3, respectively, with volume reductions greater than 50 %. In the experimental part of this research, nine beams were cast with identical size and configuration to the optimized beams. Three beams, identical to the optimized beams, were tested under static bending for verification purposes. In comparison, six more beams, as in the preceding three beams but without and with hooked end steel fibers, were tested under repeated impact load. The test results revealed that the highest flexural capacity and impact resistance at crack initiation and failure were recorded for the adaptive mesh beams (HB3 and HB3SF). The failure impact energy and ductility ratio of the beam HB3SF was higher than the beams HB1SF and HB2SF by more than 270 %. The results showed that the inclusion of steel fiber duplicated the optimized beam’s impact strength and ductility several times. The failure impact resistance of fibrous beams was higher than their corresponding plain beams by approximately 2300 to4460 %, while their impact ductility ratios were higher by 6.0 to 18.1 times.

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Section: Experimental Results Of Repeated Impact Test 61 Impact Resumentioning

confidence: 99%

Impact Response of Hammerhead Pier Fibrous Concrete Beams Designed with Topology Optimization

Salaimanimagudam

Suribabu

Murali

et al. 2020

Period. Polytech. Civil Eng.

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“…The UHPC mixtures are designed by using the modified Andreasen and Andersen model (A&A) model in according to the most closely packed principle [5,35]. The distribution coefficient (q) may be used to determine the proportions of fine and coarse particles in the mixture, of which the value is selected as 0.23 based on the available literature [36,37]. The UHPC mixtures are listed in Table 2.…”

Section: Methodsmentioning

confidence: 99%

Effects of Steel Slag Powder and Expansive Agent on the Properties of Ultra-High Performance Concrete (UHPC): Based on a Case Study

Cheng

et al. 2020

Materials

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In view of the performance requirements of mass ultra-high performance concrete (UHPC) for the Pang Gong bridge steel cable tower in China, the UHPC incorporating of steel slag powder and hybrid expansive agents is optimized and prepared. The effects of steel slag powder and hybrid expansive agents on the hydration characteristics and persistent shrinkage of UHPC are investigated. The results indicate that 15 wt.% steel slag powder and 5 wt.% hybrid expansive agents can effectively reduce the drying shrinkage deformation of UHPC with a slight decrease of strength. Heat flow calorimetry results show that the incorporation of steel slag powder and expansive agents decreases the hydration heat at three days. Moreover, the obtained adiabatic temperature rise of UHPC is 59.5 °C and the total shrinkage value at 180 days is 286 με. The hydration heat release changes of large volume UHPC in the steel-concrete section of cable tower is agreed with the result of adiabatic temperature rise in the laboratory.

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“…The addition of fibres in SCC will extend its benefits as they help to bridge cracks and delay their propagation and thus improve the mechanical properties of hardened concrete [7]. Therefore, the use of fibres may extend the possible fields of application of SCC.…”

Section: Introductionmentioning

confidence: 99%

“…The major advantages of incorporating fibres in SCC are the elimination the need for the conventional methods of compaction to consolidate the concrete [8] and the enhancement of the stability of the SCC matrix [9]. However, fibres are also known to reduce the workability and flow characteristics of fresh SCC [7][8][9]. Moreover, it is well understood that the reduction of workability due to the addition of fibres is mainly dependent on the type, geometry, amount of fibres used, and dispersion in the SCC [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…However, fibres are also known to reduce the workability and flow characteristics of fresh SCC [7][8][9]. Moreover, it is well understood that the reduction of workability due to the addition of fibres is mainly dependent on the type, geometry, amount of fibres used, and dispersion in the SCC [7,8]. The content of fibres that can be used while the mix is still workable depends entirely on the mixture composition and the type of fibres [7].…”

Section: Introductionmentioning

confidence: 99%

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Rheological Properties of Self-Compacting Concrete with 3- Dimensional Fibres

Ramli¹,

Nagaratnam²,

Poologanathan³

et al. 2020

World Congress on Civil, Structural, and Environmental Engineering

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This study investigates the effect of 3-dimensional (3D) fibres on the rheological properties of self-compacting concrete (SCC) using three different fibre volume fractions (1%, 2% and 3%). Two different sizes of 3D fibres with perimeters of 115 mm and 220 mm were considered. Rheological properties were determined through slump flow, J-ring, V-funnel and sieve segregation tests. The test results reveal that the addition of 3D fibres decreases the workability of the SCC. 3D fibres with a perimeter of 220 mm have a more adverse effect on the rheological properties of SCC than 3D fibres with a perimeter 115 mm. The balling effect occurred when 2% and 3% fibre volume fractions of 3D fibres with a perimeter of 220 mm were added to the mixture, compromising the workability of SCC.

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Key parameters in optimizing fibres orientation and distribution for Ultra-High Performance Fibre Reinforced Concrete (UHPFRC)

Cited by 42 publications

References 44 publications

Impact Response of Hammerhead Pier Fibrous Concrete Beams Designed with Topology Optimization

Impact Response of Hammerhead Pier Fibrous Concrete Beams Designed with Topology Optimization

Effects of Steel Slag Powder and Expansive Agent on the Properties of Ultra-High Performance Concrete (UHPC): Based on a Case Study

Rheological Properties of Self-Compacting Concrete with 3- Dimensional Fibres

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