Interfacial Bond Properties between Normal Strength Concrete and Epoxy Resin Concrete

It is necessary to pay attention to the bonding strength of the interface between precast normal strength concrete (NSC) and cast-in-place epoxy resin concrete (EMR) when using EMR as a repair or filling material or an overlay in bridges’ rehabilitation. However, the performances of epoxy concrete are different due to differential mix ratios; thus, the bonding properties between various epoxy resin concrete and cement concrete are not completely the same. This article investigated the interfacial bond properties between NSC and ERC by direct tensile, push-out, and slant shear test with specimens of special size and structure and observed the interfacial bond strength and corresponding failure modes. The minimum bond strength under direct tension was 0.72 MPa, while the minimum bond strength was 1.71 MPa and 3.19 MPa for the push-out test and slant shear test, respectively. Results indicated that the slant shear test specimens with an inclination angle of 45° are not suitable for the slant shear test due to higher compressive stress. Furthermore, the cohesion and friction coefficient of interface bond strength were calculated inversely in accordance with the results obtained from the corresponding direct tensile and slant shear tests. The minimum cohesion value was 1.71 MPa, and the minimum friction coefficient value was 0.46.

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Evaluation of Interfacial Performance of Normal Strength Concrete Strengthened with Ultra-High Performance Fiber Reinforced Concrete through Slant Shear Test

Journal of the Korea Concrete Institute ◽

10.4334/jkci.2018.30.4.391 ◽

2018 ◽

Vol 30 (4) ◽

pp. 391-401 ◽

Cited By ~ 1

Author(s):

Hyun-Soo Youm ◽

Woo-Young Lim ◽

Sung-Gul Hong ◽

Chang-Bin Joh

Keyword(s):

Reinforced Concrete ◽

High Performance ◽

Shear Test ◽

Fiber Reinforced Concrete ◽

Fiber Reinforced ◽

Normal Strength Concrete ◽

Strength Concrete ◽

High Performance Fiber ◽

Normal Strength ◽

Slant Shear

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Characterisation of the Interfacial bond Strength between Glass Fibre and Epoxy Resin using the Pull-Out and Push-Out Techniques

Advanced Composites Letters ◽

10.1177/096369350000900304 ◽

2000 ◽

Vol 9 (3) ◽

pp. 096369350000900 ◽

Cited By ~ 1

Author(s):

E. Mδder ◽

X.-F. Zhou ◽

E. Pisanova ◽

S. Zhandarov ◽

S. R. Nutt

Keyword(s):

Bond Strength ◽

Epoxy Resin ◽

Glass Fibre ◽

Critical Energy ◽

Interfacial Bond ◽

Interfacial Bond Strength ◽

Critical Energy Release Rate ◽

Pull Out ◽

Loading Patterns ◽

Push Out

Interfacial bond strength between epoxy resin and glass fibre was studied using the pull-out and push-out techniques. For untreated fibres, these micromechanical tests gave similar values of the local interfacial shear strength and critical energy release rate. In the case of fibres treated by γ-APS, both tests showed considerable increase in the bond strength. However, for the modified fibres, the pull-out test gave greater values of both interfacial parameters than the push-out test, a result attributed to the different modes of interfacial loading. The different loading patterns also cause different failure mechanisms in these two tests.

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Interfacial bond properties between normal strength concrete substrate and ultra-high performance concrete as a repair material

Construction and Building Materials ◽

10.1016/j.conbuildmat.2019.117431 ◽

2020 ◽

Vol 235 ◽

pp. 117431 ◽

Cited By ~ 6

Author(s):

Yang Zhang ◽

Ping Zhu ◽

Zhaoqian Liao ◽

Lianhua Wang

Keyword(s):

High Performance ◽

High Performance Concrete ◽

Repair Material ◽

Bond Properties ◽

Interfacial Bond ◽

Normal Strength Concrete ◽

Ultra High Performance Concrete ◽

Strength Concrete ◽

Normal Strength

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Bond strength of confined normal strength concrete beam-column joints

European Journal of Environmental and Civil engineering ◽

10.1080/19648189.2018.1536615 ◽

2018 ◽

pp. 1-19

Author(s):

Bilal S. Hamad ◽

Elias Y. Abou Haidar

Keyword(s):

Bond Strength ◽

Concrete Beam ◽

Normal Strength Concrete ◽

Strength Concrete ◽

Normal Strength

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Effect of Exposure Conditions on the Interfacial Bond Properties of SS400 Plate Coated with Various Epoxy Resins

Coatings ◽

10.3390/coatings10121159 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1159

Author(s):

Sungwon Kim ◽

Hyemin Hong ◽

Jun Kil Park ◽

Sangmin Park ◽

Seoung Ik Choi ◽

...

Keyword(s):

Bond Strength ◽

Epoxy Resin ◽

Epoxy Resins ◽

Tap Water ◽

Steel Plates ◽

Exposure Condition ◽

Curing Time ◽

Interfacial Bond ◽

Sem Images ◽

Exposure Conditions

This study aims to investigate the effects of different exposure conditions on the interfacial bond between steel plates and epoxy resin coatings at early ages. Test variables include the epoxy resin types, exposure conditions, exposure periods, and coating equipment. The selected epoxy resins were applied to prepared steel plates and cured at each exposure condition for 7, 28, 56, or 91 days, and the pull-off bond strength and coating thickness were measured. Scanning electron microscopy (SEM) images were obtained to study the interfacial bond for some representative coatings. Three different exposure conditions (indoors and actual marine environment) were considered in this study. This study is also focusing on the improvement of previously developed underwater coating equipment and evaluating the performance. Experiments were conducted to evaluate the performance of the improved equipment types under different environmental conditions: indoors (tap water and seawater) and outdoor conditions. The improved equipment types were confirmed to be effective for underwater coating and easier to use than the previous equipment under real sea conditions. The experimental results also confirmed that the bond strength of the coating decreased as the curing time increased.

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Adhesion between Epoxy Resin-Based Fiber Post and Dental Core Resin Improved by Non-Thermal Atmospheric Pressure Plasma

Applied Sciences ◽

10.3390/app10072535 ◽

2020 ◽

Vol 10 (7) ◽

pp. 2535

Author(s):

Hyoung-Sik Kim ◽

Song-Yi Yang ◽

Eun Ha Choi ◽

Kwang-Mahn Kim ◽

Jae-Sung Kwon

Keyword(s):

Contact Angle ◽

Bond Strength ◽

Epoxy Resin ◽

Atmospheric Pressure ◽

Shear Bond Strength ◽

Treatment Time ◽

Atmospheric Pressure Plasma ◽

Fiber Post ◽

Pressure Plasma ◽

Push Out

The purpose of the study was to evaluate the adhesion between dental core resin and epoxy resin-based fiber post after treatment with non-thermal atmospheric pressure plasma (NTAPP) and compare with conventional methods of epoxy resin-based fiber post treatments. Contact angle was measured on the surface of epoxy resin before and after NTAPP treatment and X-ray photoelectron spectroscopy was used to analyze the surface chemistry. Finally, two shear bond strength tests were carried out; shear bond strength between core resin and epoxy resin for comparison between NTAPP treated and untreated sample, and push-out shear bond strength between core resin and NTAPP treated commercially available epoxy resin-based fiber post for comparison between NTAPP treated samples with conventionally treated samples. Contact angle on the surface of epoxy resin generally decreased with increasing NTAPP treatment time with presence of surface chemical changes. Also, there was significantly higher shear bond strength and push-out shear bond strength between epoxy resin and core resin for NTAPP treated epoxy resin, even to the conventionally treated epoxy resin-based fiber post with hydrofluoric acid or silane. In conclusion, new technology of NTAPP has potential for application on the epoxy resin-based fiber post to improve endodontic restoration success rate.

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