Experimental study and mechanics model of ECC-to-concrete bond interface under tensile loading

Tian, Jun; Wu, Xiaowei; Wang, Wenwei; Hu, Shaowei; Tan, Xiao; Du, Yuchuan; Zheng, Yu; Sun, Ce

doi:10.1016/j.compstruct.2022.115203

Cited by 44 publications

(17 citation statements)

References 27 publications

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“…In Figure 8, the model of the ECC and the concrete were established by the 8-node reduced integral format 3D solid element (C3D8R), and the model of CFRP grid, GFRP bar and steel bar were developed by the 2D truss element (T3D2). The bond-slip model between the steel bars and the concrete was provided by GB50010-2010 code, 26 and the bond-slip model between the CFRP grid and the ECC was proposed by Cosenza et al 28 The model reported by Tian et al 29,30 was used to simulate the bond-slip of the ECC-concrete interface. In addition, the hybrid beam was fixed together with the steel plate using tie constraint, and the surface of the steel plate was coupled with a reference point.…”

Section: Element and Boundary Conditionsmentioning

confidence: 99%

Development of theoretical model for predicting flexural behavior of GFRP reinforced concrete beams with CFRP grid‐reinforced ECC

Zhang

Guo

et al. 2023

Structural Concrete

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Glass fiber reinforced polymer (GFRP) concrete beams reinforced by carbon fiber reinforced polymer (CFRP) grid reinforced engineering cementitious composite (ECC) have excellent flexural performance and corrosion resistance in marine environments. However, the lack of a reliable theoretical model for predicting the flexural behavior of the hybrid beams makes it challenging apply them in the practical engineering. To address this issue, a series of numerical models were established to investigate the effects of key parameters on the flexural behavior of the hybrid beams, including the peak load, the neutral axis height, and the sectional stress distribution. Subsequently, based on the influence of the failures of different materials on the flexural performance of the hybrid beam, the loads of four feature points were calculated in the theoretical model to predict the entire load–displacement curve. Finally, the application range of the theoretical model was given based on the neutral axis height. The results showed that the cover thickness of the ECC, the GFRP reinforcement ratio and the cross‐sectional area of the CFRP grid were the key factors affecting the flexural performance of the hybrid beams. The theoretical model established in this study can predict the load–displacement curve accurately and can provide a reference for the subsequent design of the hybrid beams.

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Section: Element and Boundary Conditionsmentioning

confidence: 99%

Development of theoretical model for predicting flexural behavior of GFRP reinforced concrete beams with CFRP grid‐reinforced ECC

Zhang

Guo

et al. 2023

Structural Concrete

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“…According to the results of the slant shear test, the bond-strength properties of the layered ECC substrate concrete were greater than the strength of substrate concrete which has a compressive strength of approximately 30 Mpa while layered MSC substrate concrete failure consistently took place at the interface. Tian et al [28] studied the tensile performance of ECC-to-concrete interface with both an experimental study and a mechanical model and considered the effects of the construction method, the compressive strength of ECC, PVA fiber type, and interface roughness. The interface roughness and compressive strength of ECC had a significant effect on the failure mode while the construction method and PVA fiber type slightly affected the failure mode.…”

Section: Bond Behavior Of Eccmentioning

confidence: 99%

“…ECC, which is also known as ultra-high toughness cementitious composites (UHTCC) or strain-hardening cementitious composites (SHCC), is a special type of high-performance fiber-reinforced cementitious composite designed using fracture mechanics and micromechanical principles [25][26][27][28]. Micromechanics allows optimization of the composite for high performance and also minimizes the amount of reinforcing fibers (generally less than 2-3%) [25].…”

Section: Introductionmentioning

confidence: 99%

“…Micromechanics allows optimization of the composite for high performance and also minimizes the amount of reinforcing fibers (generally less than 2-3%) [25]. ECC is essentially composed of cement, fly ash, fine sand, polyvinylalcohol (PVA) fiber or different fibers (such as polyethylene, polypropylene, polyester, acrylic, nylon, steel, and wollastonite microfibers), water and superplasticizer [27][28][29][30][31][32][33][34][35][36]. Owing to the absence of coarse aggregate and the high cost of fiber, ECC also has a negative environmental impact and high-cost disadvantages [37].…”

Section: Introductionmentioning

confidence: 99%

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Application of ECC as a Repair/Retrofit and Pavement/Bridge Deck Material for Sustainable Structures: A Review

2022

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Concrete structures cannot efficiently perform their functions over time due to chemical and physical external effects. Thus, enhancing the relationship between repair and aged structures, and also improving the durability properties of concrete is crucial in terms of sustainability. However, high costs, negative environmental effects, and incompatibility problems occur in repair/retrofit applications. Furthermore, three-quarters of the failures in the repaired/retrofitted structures are caused by a lack of repair durability. The need for repair in pavement/bridge decks is also frequently encountered, and early-age performance problems with repair materials cause pavement/bridge decks to be unavailable for certain periods of time. Engineered Cementitious Composite (ECC) can be effectively used as repair/retrofit and pavement/bridge deck material. It also has a minimal need for repair/retrofit thanks to its high durability properties. This article presents state-of-the-art research regarding the application of ECC as a repair/retrofit and pavement/bridge deck material. Studies in the literature show that the repair/retrofit properties of ECC outperform conventional concrete and steel fiber-reinforced concrete. ECC can be a solution to high early strength and drying shrinkage problems frequently encountered in the use of repair materials. It could also be used for different repair applications such as cast, sprayed, and trenchless rehabilitation. Moreover, ECC might fulfill specific requirements for pavement, pavement overlay, tunnel pavement, airfield pavement, and bridge deck. These superior performances are attributed to ECC’s kink-crack trapping mechanism, uniquely large inelastic strain capacity, strain hardening, high tensile strain capacity, and multiple microcracking and ductile behaviors, especially bonding behavior and self-healing.

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“…Likewise, to improve the interfacial bonding strength, some scholars put forward the idea that increasing the interfacial roughness was the most straightforward and effective solution. Tian et al [ 29 ] compared the effects of the construction method, compressive strength, PVA fiber type, and interfacial roughness on the tensile property of ECC/concrete, where the results showed that the influence of interfacial roughness far outweighed other factors. Furthermore, the interfacial shear and tensile properties were the most critical for evaluating the interfacial bonding effect [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Exploration of Economic Polypropylene-Fiber-Reinforced ECC with Superfine River Sand (SSPP-ECC) Applied to a Bridge Pavement Leveling Overlay

et al. 2022

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In response to the current common disease of concrete leveling overlays of bridge pavement in China, the feasibility of using an economic SSPP-ECC with local waste superfine sand as an alternative material for a leveling overlay was proposed in this study. To evaluate the interface bonding property in the girder between the SSPP-ECC and concrete, a slant shear test and split tensile test were designed to study the interfacial shear and tensile properties of the ordinary concrete/ordinary concrete (OC/OC) and ordinary concrete/SSPP-ECC (OC/ECC), where the results showed that SSPP-ECC could significantly improve the interface shear stress and split tensile strength compared to ordinary concrete. Furthermore, the damage status of OC/ECC no longer involved fracturing along the interface; instead, each of the two substrates was partially destroyed, which revealed that OC/ECC had a high bonding effect. Moreover, a restrained shrinkage test was carried out to evaluate the shrinkage property of SSPP-ECC, where the result showed that the shrinkage strain of SSPP-ECC was slightly lower than concrete, where the average cracking time for SSPP-ECC was far longer than for ordinary concrete under the same ambient drying conditions; furthermore, the stress rate for SSPP-ECC revealed that it was a low-cracking-risk material. Meanwhile, the crack width of SSPP-ECC was only 0.1 mm after 35 d, which showed that SSPP-ECC had a more substantial crack width control capacity relative to concrete. The test results initially verified the feasibility and great potential of economic SSPP-ECC applied in a bridge pavement leveling overlay.

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Experimental study and mechanics model of ECC-to-concrete bond interface under tensile loading

Cited by 44 publications

References 27 publications

Development of theoretical model for predicting flexural behavior of GFRP reinforced concrete beams with CFRP grid‐reinforced ECC

Development of theoretical model for predicting flexural behavior of GFRP reinforced concrete beams with CFRP grid‐reinforced ECC

Application of ECC as a Repair/Retrofit and Pavement/Bridge Deck Material for Sustainable Structures: A Review

Preliminary Exploration of Economic Polypropylene-Fiber-Reinforced ECC with Superfine River Sand (SSPP-ECC) Applied to a Bridge Pavement Leveling Overlay

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