Size effect on flexural behavior of ultra-high-performance hybrid fiber-reinforced concrete

Nguyen, Duy H. N.; Kim, Dong-Joo; Ryu, Gum-Sung; Koh, Kyung Taek

doi:10.1016/j.compositesb.2012.07.012

Cited by 176 publications

(73 citation statements)

References 22 publications

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“…It may be observed that changing the dimensions of the cross-section produced different effects depending on the fibre content of the mix. It has been previously reported that as the size of the specimen decreases, so does the flexural strength capacity [9]. However, in the light of the results obtained here, this conclusion might be influenced by additional factors.…”

Section: Experimental Programsupporting

confidence: 42%

Size Effect on Post-cracking Strength of High Performance Fibre-Reinforced Concrete

Galeote

Blanco

Fuente

et al. 2017

High Tech Concrete: Where Technology and Engineering Meet

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The size effect is a well-known phenomenon in the design of reinforced concrete structures. Although it has been studied extensively for conventional concrete with or without traditional reinforcement, its influence on the post-cracking behaviour of fibrereinforced composites is scarcely reported in literature. This is particularly true in the case of high performance fibre-reinforced concrete (HPFRC), which allows the design of very thin elements and whose behaviour may be highly influenced by their size. The aim of this research was to evaluate the influence of the size of HPFRC beams on the mechanical performance at a cross-sectional level. An experimental program involving three-point bending tests of HPFRC on beams of dimensions 40 x 40 x 160, 100 x 100 x 400 and 150 x 150 x 600 mm was conducted. Three steel fibre contents were investigated: 90, 140 and 190 kg/m 3 . These bending tests were also simulated via a sectional analysis model, taking as a reference the constitutive law described in the fib Model Code for Concrete Structures 2010. The results suggest that the values of stress in the constitutive model should depend upon the cross-sectional size of the beam. This is reflected when adjusting the parameters of the MC2010 to fit the experimental values, resulting in a coefficient of determination above 0.88 when comparing the ratio between these two parameters and the size of the cross section.

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Section: Experimental Programsupporting

confidence: 42%

Size Effect on Post-cracking Strength of High Performance Fibre-Reinforced Concrete

Galeote

Blanco

Fuente

et al. 2017

High Tech Concrete: Where Technology and Engineering Meet

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“…Ultra-high performance cementitious composites (UHPCC) are a new type of composite materials made primarily from hydraulic cements, fine aggregates and discrete reinforcing fibers with outstanding material properties. UHPCC has been used extensively throughout the whole world due to its ultra-high mechanical properties, dense structure, low capillary porosity and excellent durability [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effects of nano-SiO2 particles on the mechanical and microstructural properties of ultra-high performance cementitious composites

Rong

Sun

Xiao

et al. 2015

Cement and Concrete Composites

257

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“…This was attributed to the improved fiber orientation in the smaller specimens (Orgass and Klug 2004). Furthermore, it was reported that the average number of cracks and their spacing decreased as the specimen size decreased (Nguyen et al 2013). This was directly related to their increased flexural tensile strain capacity (Nguyen et al 2013).…”

Section: Effect Of Specimen Sizementioning

confidence: 99%

“…Furthermore, it was reported that the average number of cracks and their spacing decreased as the specimen size decreased (Nguyen et al 2013). This was directly related to their increased flexural tensile strain capacity (Nguyen et al 2013). AFGC-SETRA (2002) recommended a reduction factor of 9 % when the specimen height increases from 100 mm (3.97 in) to 150 mm (5.90 in).…”

Section: Effect Of Specimen Sizementioning

confidence: 99%

Ultra-High Performance Concrete: Mechanical Performance, Durability, Sustainability and Implementation Challenges

Abbas

Nehdi

Saleem

2016

Int J Concr Struct Mater

335

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In this study, an extensive literature review has been conducted on the material characterization of UHPC and its potential for large-scale field applicability. The successful production of ultra-high performance concrete (UHPC) depends on its material ingredients and mixture proportioning, which leads to denser and relatively more homogenous particle packing. A database was compiled from various research and field studies around the world on the mechanical and durability performance of UHPC. It is shown that UHPC provides a viable and long-term solution for improved sustainable construction owing to its ultrahigh strength properties, improved fatigue behavior and very low porosity, leading to excellent resistance against aggressive environments. The literature review revealed that the curing regimes and fiber dosage are the main factors that control the mechanical and durability properties of UHPC. Currently, the applications of UHPC in construction are very limited due to its higher initial cost, lack of contractor experience and the absence of widely accepted design provisions. However, sustained research progress in producing UHPC using locally available materials under normal curing conditions should reduce its material cost. Current challenges regarding the implementation of UHPC in full-scale structures are highlighted. This study strives to assist engineers, consultants, contractors and other construction industry stakeholders to better understand the unique characteristics and capabilities of UHPC, which should demystify this resilient and sustainable construction material.

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Size effect on flexural behavior of ultra-high-performance hybrid fiber-reinforced concrete

Cited by 176 publications

References 22 publications

Size Effect on Post-cracking Strength of High Performance Fibre-Reinforced Concrete

Size Effect on Post-cracking Strength of High Performance Fibre-Reinforced Concrete

Effects of nano-SiO2 particles on the mechanical and microstructural properties of ultra-high performance cementitious composites

Ultra-High Performance Concrete: Mechanical Performance, Durability, Sustainability and Implementation Challenges

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