Experimental study, modeling, and reliability analysis of impact resistance of micro steel fiber‐reinforced concrete modified with nano silica

Haruna, Sadi İbrahim; Zhu, Han; Shao, Jianwen

doi:10.1002/suco.202100651

Cited by 21 publications

(9 citation statements)

References 47 publications

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“…The Eq. ( 4) and ( 5) assess the response of the model with both linear and nonlinear independent variables [27] [28].…”

Section: Response Surface Methodologymentioning

confidence: 99%

Impact resistance of Macro and Micro steel fibre reinforced Self- Compacted Concrete (SFRSCC) with modelling and reliability analysis

2023

Preprint

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Adding steel fibres can transform the brittle characteristic of concrete into a ductile state. The objective of the current study is to test the impact resistance of macro and micro steel fibre-reinforced self-compacting concrete (SFRSCC) experimentally by applying a simulated drop-weight impact, as well as statistically and through reliability studies. Cube specimens were used for the experiment. The inclusion of macro and micro steel fibre (SF) greatly increased the concrete mixture’s impact resistance. All the concrete samples exhibited the same failure pattern. Using Response Surface Methodology (RSM), the impact resistance of SFRSCC mixtures can be accurately predicted. The first and failure cracks (N1 and N2) follow a two-parameter Weibull distribution (WD) function of drop-weight impact test.

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“…The Eq. ( 4) and ( 5) assess the response of the model with both linear and nonlinear independent variables [27] [28].…”

Section: Response Surface Methodologymentioning

confidence: 99%

Impact resistance of Macro and Micro steel fibre reinforced Self- Compacted Concrete (SFRSCC) with modelling and reliability analysis

2023

Preprint

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“…The number of impacting blows at the failure stage was recorded as the ultimate strength (N U ). During drop-weight impact testing, the U-shaped specimen's impact energy was determined from the potential energy of the falling weight [43,50]. The energy absorption capacities of the test specimens for the number of blows (N) and falling hammer (m) released from the fixed height (h) corresponding to the specified cracking strengths were evaluated using Equation ( 1)…”

Section: Drop-weight Impact Test Of Pupcmentioning

confidence: 99%

“…The factors responsible for these variations are as follows: (i) During the test, cracks can occur anywhere and in any direction on the cylinder specimen adopted in this impact testing procedure; and (ii) Any failure modes are considered in the test, contributing to the dispersed result. For this reason, the current study adopted a U-shaped specimen, as found in the literature [40][41][42][43] to minimize the drop-weight impact test result variations by restraining the crack formation, which is expected to occur in a predetermined position. Many studies have been conducted to study the potential uses of polyurethane for strengthening and retrofitting to improve structures' impact resistance [28,31,33].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Statistical Analysis of U-Shaped Polyurethane-Based Polymer Concrete under Static and Impact Loads as a Repair Material

et al. 2022

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The prolonged service life of civil engineering structures, such as buildings and highway pavement, means that they deteriorate with time, requiring frequent repair work. Polyurethane (PU) materials can effectively maintain engineering structures such as road pavement, runways, and buildings. Thus, the mechanical properties and dynamic performance of these materials for repair are essential to guarantee the safe usage of the facilities. This study investigated the strain–stress behavior and impact strength of polyurethane-based polymer concrete (PUPC) mixtures. Moreover, the tensile stress–strain behavior of rigid PU grout (PUGC) materials was evaluated. The result indicated that the U-shaped PUPC with 20% PU by weight experienced a maximum failure strain of 0.9% and 4.2% under static and dynamic loads, respectively. The average impact energy of PUPC was 3825% higher than that of normal concrete. According to PUGC’s mixing ratios, the average elastic modulus revealed an increasing trend, whereas ultimate strength, yield strain, yield stress, and failure stress showed a decreasing trend. Weibull distribution results showed that the probabilistic distribution of the impact strength followed the two-parameter Weibull distribution.

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“…The failure mode of the SSC mixture is continuous. The following assumptions can be made 53,54 : (1) SSA and natural aggregate were evenly distributed in concrete.…”

Section: Development Of Damage Modelmentioning

confidence: 99%

“…The failure mode of the SSC mixture is continuous. The following assumptions can be made 53,54 : (1) SSA and natural aggregate were evenly distributed in concrete. (2) Under the compression test, the SSC mixtures damage was initially originated in the ITZ of SSA and cement paste, followed by the appearance of damage in the ITZ of natural aggregate and cement particles.…”

Section: Damage Modelmentioning

confidence: 99%

Mechanical performance, microstructure, and damage model of concrete containing steel slag aggregate

Xue

et al. 2022

Structural Concrete

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Reusing industrial solid waste in cement‐based products is an economical and environmentally friendly solution. This study investigated the effect of steel slag on the mechanical properties of concrete mixtures, and development of damage constitutive relationship of steel slag concrete (SSC). Two steel slag aggregates, including fine steel slag aggregate (SSAF) and coarse steel slag aggregate (SSAC) were incorporated into the concrete mixtures to SSC. The portions of natural sand and coarse aggregate each were replaced with SSAF and SSAC at 10%–100% (interval of 20%) by weight. Therefore, effects of SSAF and SSAC on the mechanical properties of SSC mixtures were evaluated separately. Moreover, damage model of SSC mixtures was developed based on Lemaitre's equivalent strain principle and Weibull probability density function. The damage constitutive model was revised using the functional relationship between the toughness index, brittleness index, and distribution parameters. The results indicate that SSC's mechanical properties, crack resistance, and toughness have been significantly improved with increased steel slag content. However, reduction in strength was observed in the SSC specimens containing steel slag above 50% replacement. Nevertheless, these strengths are higher than that of normal concrete. The modified damage constitutive relationship fits better with the experimental results.

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Experimental study, modeling, and reliability analysis of impact resistance of micro steel fiber‐reinforced concrete modified with nano silica

Cited by 21 publications

References 47 publications

Impact resistance of Macro and Micro steel fibre reinforced Self- Compacted Concrete (SFRSCC) with modelling and reliability analysis

Impact resistance of Macro and Micro steel fibre reinforced Self- Compacted Concrete (SFRSCC) with modelling and reliability analysis

Experimental and Statistical Analysis of U-Shaped Polyurethane-Based Polymer Concrete under Static and Impact Loads as a Repair Material

Mechanical performance, microstructure, and damage model of concrete containing steel slag aggregate

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