Application of Ultrasonic Measurements for the Evaluation of Steel Fiber Reinforced Concrete

Gebretsadik, Belayhun Tesfaye; Jadidi, Kazem; Farhangi, Visar; Karakouzian, Moses

doi:10.48084/etasr.3915

Cited by 25 publications

(20 citation statements)

References 37 publications

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“…The accuracy and effectiveness of the new model are verified against the test data from [3,20]. In the future, focus may be given to the behavior of CFST with steel fiber reinforcement [21], concrete using fly ash [22], or concrete with cement paste including silica oxide nanoparticles.…”

Section: Introductionmentioning

confidence: 91%

“…The predicted ܰ − ߝ curve from the new model matches well with the test data, for both normal materials and thin-walled steel tubes, which indicates the versatility of the developed modeling in calculating the load-deformation curves. Regarding future work, the behavior of CFST columns with steel fiber reinforcement [21], concrete using fly ash [22], concrete with cement paste with including silica oxide nanoparticles [20], etc. can be studied by performing FEM simulation.…”

Section: B ܰ − ߝ Curves Of the Cfst Columnmentioning

confidence: 99%

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Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns

Nguyen

Pham

Tran

et al. 2021

Eng. Technol. Appl. Sci. Res.

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Predicting the behavior of concrete in a Concrete-Filled Steel Tubular (CFST) column is challenging due to the sensitivity to input parameters such as the size of the cross-section, the material modeling, and the boundary conditions. The present paper proposes a new modified finite element model to predict the behavior and strength of a CFST subjected to axial compression. The development is based on the concrete damaged plasticity model, with its stress-strain relationship revised from the available model. The predicted accuracy of the modified model is verified via a wide range of experimental tests. The proposed model has more accuracy than the available models in predicting the ultimate compression strength. The results show good agreement with the test data, allowing its use in modeling CFST columns.

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Section: Introductionmentioning

confidence: 91%

Section: B ܰ − ߝ Curves Of the Cfst Columnmentioning

confidence: 99%

Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns

Nguyen

Pham

Tran

et al. 2021

Eng. Technol. Appl. Sci. Res.

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“…Appropriate curing leads to a significant improvement in concrete compressive and flexural strengths [26]. In addition, aggregate type and particle size are among other factors affecting the concrete properties such as the compressive strength [27,28].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Concrete’s Durability and Mechanical Characteristics Subjected to Different Curing Regimes

et al. 2021

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Considering a constant demand in construction of concrete structures to develop novel approaches for predicting the concert’s properties, a host of investigations were performed on concrete’s mechanical properties and durability under various curing regimes. However, few studies were concerned with evaluating the concrete’s durability using non-destructive concrete surface resistivity tests by applying various curing conditions. The present study compares the influence of different curing regimes on durability and compressive strength of concrete to recommend the most effective curing conditions on concrete’s characteristics. Five curing conditions including ambient, laboratory, dry oven, wet oven and 7-days were analyzed. Accordingly, a non-destructive concrete surface resistivity test was performed on the concrete specimens using hand-held Wenner Resipod probe meter as a reliable and rapid approach. To analyze specimen’s durability, results of the surface sensitivity tests were correlated to chloride ion penetration rate based on the cylinder specimen dimensions and the degree of chloride ion penetration. The compressive strength tests were conducted on the specimens after 7, 28 and 56 days to determine the effect of curing conditions at different ages. Based on the reported outcomes, applying the wet oven curing regime results in higher compressive strength and durability compared to the other curing conditions. Doi: 10.28991/cej-2021-03091681 Full Text: PDF

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“…Their elastic modulus is greater than the 1 TPa, although their density is almost 15% of steel. Application of nanotechnology and fibers to improve the mechanical properties of self-compacting concrete (SCC) were assessed in several studies [24][25][26][27][28]. Fly ash (FA) as a sustainable material [29] can also be used along with nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characteristics of Cement Paste in the Presence of Carbon Nanotubes and Silica Oxide Nanoparticles: An Experimental Study

et al. 2021

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Considering the remarkable characteristics of nanomaterials, previous research studies investigated the effects of incorporating different types of these materials on improving the concrete properties. However, further studies are required to evaluate the complementary hybridization and synergistic influence of nanomaterials. In this research, the combined effect of adding nano silica particles (NS) and multi-walled carbon nanotubes (MWCNT) on enhancing both the compressive and flexural strengths of the cement paste was investigated. Moreover, the morphology of the interface between cement paste and aggregates was studied by scanning electron microscopy (SEM). The mixtures were prepared using three different portions of MWCNT and NS. Electron microscopy images indicated a uniform distribution of nanoparticles in the cement matrix, enhanced hydration reactions, and increased density. Based on the experiments’ outcomes, the combined utilization of silica and carbon nanomaterials in the cement paste did not necessarily result in the maximum compressive and flexural strengths. Furthermore, it was observed that the use of higher percentages of pristine NS in the absence of MWCNT can lead to further enhancement of strength properties of the cement paste.

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Application of Ultrasonic Measurements for the Evaluation of Steel Fiber Reinforced Concrete

Cited by 25 publications

References 37 publications

Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns

Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns

An Experimental Study on Concrete’s Durability and Mechanical Characteristics Subjected to Different Curing Regimes

Mechanical Characteristics of Cement Paste in the Presence of Carbon Nanotubes and Silica Oxide Nanoparticles: An Experimental Study

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