Laboratory and in situ investigation of the compressive strength of CFRD concrete

Oskouei, Asghar Vatani; Nazari, Reza A.; Khaneghahi, Mohammad Houshmand

doi:10.1016/j.conbuildmat.2020.118166

Cited by 13 publications

(2 citation statements)

References 29 publications

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“…However, the thin-layer structure of the panels makes them prone to cracking. Improving the flexural performance of panel concrete is crucial for crack resistance and the seepage prevention of CFRD [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Flexural Performance of Steel–Polyvinyl Alcohol Hybrid Fiber-Reinforced Concrete

Wu,

Zhang,

Han

et al. 2024

Materials

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This paper explores the impact of steel–PVA hybrid fibers (S-PVA HF) on the flexural performance of panel concrete via three-point bending tests. Crack development in the concrete is analyzed through Digital Image Correlation (DIC) and Scanning Electron Microscope (SEM) experiments, unveiling the underlying mechanisms. The evolution of cracks in concrete is quantitatively analyzed based on fractal theory, and a predictive model for flexural strength (PMFS) is established. The results show that the S-PVA HF exhibits a synergistic effect in enhancing and toughening the concrete at multi-scale. The crack area of steel–PVA hybrid fiber concrete (S-PVA HFRC) is linearly correlated with deflection (δ), and it further reduces the crack development rate and crack area compared to steel fiber-reinforced concrete (SFRC). The S-PVA HF improves the proportional ultimate strength (fL) and residual flexural strength (fR,j) of concrete, and the optimal flexural performance of concrete is achieved when the steel fiber dosage is 1.0% and the PVA fiber dosage is 0.2%. The established PMFS of hybrid fiber-reinforced concrete (HFRC) can effectively predict the flexural strength of concrete.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Flexural Performance of Steel–Polyvinyl Alcohol Hybrid Fiber-Reinforced Concrete

Wu,

Zhang,

Han

et al. 2024

Materials

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“…Liu et al [18] defined the special concrete strength curves for the Oujiang River Bridge based on the test results with ZC3-A regular rebound hammer and H450 high-strength rebound hammer. Vatani Oskouei et al [19] developed the concrete strength predictive model for concrete face rockfill dams in Bijar (Gilan province) by analyzing the relationship between rebound number and compressive strength. Accordingly, it is quite meaningful to develop a regression model, considering both the rebound number and compressive strength for a specific project, and to improve the accuracy of the rebound method in predicting the compressive strength of concrete structure.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Special Testing Strength Curve for Compressive Strength Evaluation by Rebound Method

Yuan

Yang

Jin³

et al. 2021

Advances in Materials Science and Engineering

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This article aims to improve the accuracy and predictability of rebound method in compressive strength evaluation of concrete members of the Yanchong Expressway, which is an important traffic guarantee project for the 2022 Winter Olympics Games in Zhangjiakou city, Hebei Province, China. For this purpose, concrete specimens were prepared by the mixing ratios of C35, C40, and C50. First of all, the paper investigated the effects of curing age, types, and dosage of mineral admixtures (fly ash and slag) on concrete rebound number and compressive strength. Then, the special testing strength curves of 7 d and 90 d curing age were proposed. The results showed that the average relative errors of the special testing strength curves were reduced by 35.99% and 20.26% respectively, compared with the national testing strength curve. Fly ash and slag were beneficial to the growth of concrete rebound numbers but cannot contribute to the growth of concrete compressive strength (except for fly ash single-mixed with 15% dosage). The present results can provide a significant reference for the compressive strength evaluation and later maintenance of concrete members of the Yanchong Expressway or other projects with tight construction period in this area.

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Influence of reactivity and dosage of MgO expansive agent on shrinkage and crack resistance of face slab concrete

Wang

et al. 2022

Cement and Concrete Composites

107

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Laboratory and in situ investigation of the compressive strength of CFRD concrete

Cited by 13 publications

References 29 publications

Experimental Study on the Flexural Performance of Steel–Polyvinyl Alcohol Hybrid Fiber-Reinforced Concrete

Experimental Study on the Flexural Performance of Steel–Polyvinyl Alcohol Hybrid Fiber-Reinforced Concrete

Experimental Study on Special Testing Strength Curve for Compressive Strength Evaluation by Rebound Method

Influence of reactivity and dosage of MgO expansive agent on shrinkage and crack resistance of face slab concrete

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