Effect of composition variations on bond properties of Self-Compacting Concrete specimens

Sfikas, Ioannis P.; Trezos, Konstantinos G.

doi:10.1016/j.conbuildmat.2012.11.094

Cited by 44 publications

(15 citation statements)

References 13 publications

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“…The increasing of the amount of C-S-G gel and the compacting of the matrix result in better mechanical properties of concrete. The positive influence of SF on the structure of interfacial transition zone can also partly account for the compressive strength increases of concrete [26][27][28]. It is apparently that the early-age compressive strengths of concretes at steam-curing temperature of 50°C are higher than that of concretes cured at 20°C.…”

Section: Compressive Strength Of Concretementioning

confidence: 99%

Hydration and microstructures of concrete containing raw or densified silica fume at different curing temperatures

Zhang

Yan

2016

Construction and Building Materials

112

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Section: Compressive Strength Of Concretementioning

confidence: 99%

Hydration and microstructures of concrete containing raw or densified silica fume at different curing temperatures

Zhang

Yan

2016

Construction and Building Materials

112

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“…2). Changing each of these factors in both fields of the quality and the quantity can considerably change rebar-concrete interface properties [37,40,41]. In this field, recently, Mousavi et al [42] confirmed the hypothesis that type and dosage of the used powder in concrete can change the rebar-concrete bond strength, and improve the damaged layers around the rebar caused by the pre-cracked phenomenon.…”

Section: References Equationsmentioning

confidence: 99%

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

2020

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Minimum concrete cover for rebar, rebar diameter, concrete compressive strength, embedded length of rebar, and lateral reinforcement by stirrups are the crucial factors considered in existing predicting equations and regulations for predicting rebar-concrete interface (RCI) bond strength. However, considerable effects of concrete composition on RCI are ignored in design codes and investigations. This paper intends to comprehensively highlight the critical aspects of this research gap. Additionally, a practical experimental approach is described in the present study to efficiently consider the effect of the new generations of concrete on RCI bond strength. Finally, nano-concrete is considered as a case study to show the importance of nanoparticle types on RCI bond strength. Overall results show that studying the microstructure of the transition zone at RCI is essential to accompany with the RCI bond strength for considering new generations of concrete in reinforced concrete structures. Additionally, the current study emphasizes that more investigations are necessary to be conducted by future works to fill the existing research gaps in RCI.

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“…The average drop of the normalised bond strength of the steel bars across the lengths of the specimens was approximately 11%. But there are studies in which no bond loss is evident for distances from the casting point of up to 1.60 m (Sfikas and Trezos 2013;Trezos et al 2014). For shorter distances from the casting point, up to 0.90 m (Thrane et al 2010), no evident bond loss was observed.…”

Section: Previous Investigationsmentioning

confidence: 99%

The Top-Bar Effect in Specimens with a Single Casting Point at One Edge in High-Performance Self-Compacting Concrete

Dybeł

Wałach

Ostrowski

2018

ACT

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An investigation of the steel-to-concrete bond in high-performance self-compacting concrete (HPSCC) is presented based on direct pull-out tests. The investigation was performed on specimens made of three different HPSCC mixes with varying contents of silica fume (without, 5 and 10% by mass of cement). Specifically, the top-bar effect in specimens with a single casting point at one edge was examined. Horizontal specimens with transverse rebars distributed over their heights (480 mm) and lengths (1600 mm) were cast. The bond capacity of the HPSCC was decreased across the length up to the measured rebar distance from the casting point. The reduction occurred with the same magnitude in both the lower and upper section of the horizontal specimens. It was found that the top-bar effect did not change significantly with an increasing distance of the rebars from the casting point of the concrete mixture. It was demonstrated that the modification of the HPSCC using the silica fume significantly improved the quality of the bond conditions.

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Effect of composition variations on bond properties of Self-Compacting Concrete specimens

Cited by 44 publications

References 13 publications

Hydration and microstructures of concrete containing raw or densified silica fume at different curing temperatures

Hydration and microstructures of concrete containing raw or densified silica fume at different curing temperatures

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

The Top-Bar Effect in Specimens with a Single Casting Point at One Edge in High-Performance Self-Compacting Concrete

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