Concrete-to-concrete bond Strength: A review

Afandi, M. EL; Yehia, Sherif; Landolsi, T.; Qaddoumi, Nasser; Elchalakani, Mohamed

doi:10.1016/j.conbuildmat.2022.129820

Cited by 40 publications

(14 citation statements)

References 55 publications

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“…According to standard ASTM C1069 [ 40 ], a universal testing machine was used to test the bending strength by the four-point bending method. The specimen size was 100 × 100 × 400 mm, with the thickness ratio of WUHPC: NC = 1:1, 1:3, and 1:4, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Finite Element Analysis of Bonding Property and Flexural Strength of WUHPC-NC Gradient Concrete

Tian,

Ma,

Sun

et al. 2023

Materials

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Ultra-high-performance concrete (UHPC) has greater mechanical and durability performance than normal concrete (NC). Using a limited dosage of UHPC on the external surface of NC to form a gradient structure could significantly improve the strength and corrosion resistance of the concrete structure and avoid the problems caused by bulk UHPC. In this work, white ultra-high-performance concrete (WUHPC) was selected as an external protection layer for normal concrete to construct the gradient structure. WUHPC of different strengths were prepared, and 27 gradient WUHPC-NC specimens with different WUHPC strengths and interval times of 0, 10, and 20 h were tested using splitting tensile strength to reveal the bonding properties. Fifteen prism gradient specimens with the size of 100 × 100 × 400 mm and a WUHPC ratio of 1:1, 1:3, and 1:4 were tested using the four-pointed bending method to study the bending performance of the gradient concrete with different WUHPC thicknesses. Finite element models with different WUHPC thicknesses were also built to simulate the cracking behaviors. The results showed that the bonding properties of WUHPC-NC were stronger with less interval time and reached the maximum of 1.5 MPa when the interval was 0 h. Moreover, the bond strength first increased and then decreased with the decline in the strength gap between WUHPC and NC. When the thickness ratios of WUHPC to NC were 1:4, 1:3, and 1:1, the flexural strength of the gradient concrete improved by 89.82%, 78.80%, and 83.31%, respectively. The major cracks rapidly propagated from the 2 cm position to the bottom of the mid-span, and the thickness of 1:4 was the most efficient design. The results simulated by finite element analysis also proved that the elastic strain at the crack propagating point was the minimum and was easier to crack. The simulated results were in good accordance with the experimental phenomenon.

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Section: Methodsmentioning

confidence: 99%

“…The bonding property is one of the key points for the gradient concrete, which is affected by many factors, such as stiffness, roughness, moisture, and shrinkage [ 40 ]. Since the shrinkage of UHPC at an early age was much higher than NC, large internal stress was induced in the transition zone.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Bonding Property and Flexural Strength of WUHPC-NC Gradient Concrete

Tian,

Ma,

Sun

et al. 2023

Materials

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“…Consequently, meticulous consideration and standardization of the testing method are vital to ensure precise and dependable evaluation of interface performance. Commonly utilized experimental techniques for assessing the bond performance at the interface include slant shear, direct shear, split-tension, and pull-off tests (El Afandi et al, 2023). The schematic diagram is illustrated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…When interface failure is attributed to the deterioration of the concrete substrate, enhancing the strength of the concrete improves the bond performance at the interface. However, there exists a threshold beyond which the increase in bond strength is limited (El Afandi et al, 2023; Wang et al, 2016). The characteristics of ECC encompasses various aspects, including the tensile strength, fiber type, construction method, etc.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the interfacial bond performance of engineered cementitious composites and concrete

Huang,

Hou,

et al. 2024

Advances in Structural Engineering

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This study aims to investigate the influence of different surface treatments, including smooth interface, rough interface, anchor bolt connection, and epoxy bonding agent, on the shear resistance of Engineered Cementitious Composites (ECC)-concrete interface through bi-surface shear testing. The experimental results show that the interfacial shear strength between ECC and concrete is significantly enhanced by the implementation of the three interface treatment methods, as opposed to the smooth interface. Among these methods, the anchor bolt connection exhibits the greatest improvement in interfacial bonding performance. Notably, cohesive failure is observed in the anchor bolt connection method, while the other three methods result in adhesive failure, with only the anchor bolt connection method displaying ductile failure behavior. Following a comprehensive review of relevant studies and the outcomes of this experiment, three distinct interface bonding mechanisms were identified and the forces contributing to the bond were analyzed. Results indicated that the interfacial bond strength is notably influenced by the surface roughness. These research findings substantiate the viability of utilizing the anchor bolt connection method, particularly in applications where ductility requirements in the repair layer are essential for structural integrity.

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“…As estruturas de concreto armado frequentemente apresentam fissuras de flexão, transversais à armadura principal, devido aos esforços na região tracionada da seção solicitada, estando o risco e a evolução de corrosão nas regiões de fissuras condicionados às propriedades do cobrimento (Cunha et al, 2001). O concreto de cobrimento tem por finalidade a proteção da armadura, através de barreira física ao ingresso de agentes externos e, principalmente, por proteção química (Helene, 1986;Ribeiro, 2018;Alves et al, 2022;Afandi et al, 2022, Portela et al, 2020. Segundo a NBR 6118 (ABNT, 2014), a durabilidade de uma estrutura depende das características da espessura e da qualidade do concreto de cobrimento.…”

Section: Introductionunclassified

Utilização do concreto autocicatrizante e sua influência na corrosão das armaduras

Schmidt

Dias

Meinhart

et al. 2022

RSD

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O concreto é um material poroso que possui baixa resistência à tração, o que o torna suscetível a fissuração, possibilitando infiltração de água e agentes agressivos, tornando a armadura, se existente, vulnerável ao processo corrosivo. Assim, torna-se necessária a busca por soluções que reduzam a permeabilidade do material, e a utilização de concreto com propriedades autocicatrizantes apresenta-se como alternativa para atenuar os efeitos da fissuração. Neste sentido, o objetivo do presente trabalho é avaliar a influência da corrosão das armaduras com a utilização de concreto autocicatrizante. Para tanto, analisou-se a eficiência de um concreto com aditivo impermeabilizante por cristalização integral, com capacidade de autocicatrização de microfissuras de até 0,4 mm, comparando corpos de prova cilíndricos e prismáticos, com e sem aditivo, em ensaios de resistência à compressão, para avaliar possíveis alterações nas propriedades mecânicas do concreto, além do ensaio de corrosão acelerada para avaliar a influência do aditivo na mistura frente ao fator corrosão. Aplicou-se ciclos de imersão parcial, em solução de NaCl (3,5%), e secagem, em todos os corpos de prova e, após finalizados os ciclos, realizou-se ensaios para avaliação de corrosão. Por fim, constatou-se que a incorporação de aditivo não influenciou significativamente a resistência à compressão do concreto, além de não influenciar, de forma considerável, a prevenção de corrosão das armaduras durante o período analisado. Desta forma, não pode-se concluir que a utilização do concreto autocicatrizante analisado possa ser uma alternativa para problemas de durabilidade.

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Concrete-to-concrete bond Strength: A review

Cited by 40 publications

References 55 publications

Finite Element Analysis of Bonding Property and Flexural Strength of WUHPC-NC Gradient Concrete

Finite Element Analysis of Bonding Property and Flexural Strength of WUHPC-NC Gradient Concrete

Enhancing the interfacial bond performance of engineered cementitious composites and concrete

Utilização do concreto autocicatrizante e sua influência na corrosão das armaduras

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