Experimental study and numerical simulation of the interfacial bonding performance of ordinary concrete reinforced with reactive powder concrete

Du, Guoqiang; Xu, Binduo; Bu, Liangtao

doi:10.1016/j.jobe.2022.105352

Cited by 2 publications

(4 citation statements)

References 22 publications

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“…The shear force transfer mechanism [21] is shown in Figure 13. When the interface undergoes relative slip u due to shear, the rebars are also driven and thus generate tension F t and create an angle α with the rough interface.…”

Section: Shearing Mechanism and Comparison Of Resultsmentioning

confidence: 99%

“…The bonding strength of the interface is mainly influenced by the roughness of the interface, the Van der Waals force and the shrinkage and rebar difference between new and old concrete [18]. In recent years, scholars have conducted relevant studies mainly on roughness treatment [19], interface agent performance enhancement [20], high-tech repair material application [21] and rebar implantation [22]. Among them, the research direction of roughness, interface agent and high-tech repair materials is to improve the adhesion and friction of the bonding interface to improve the strength, which is to improve the bonding strength by mechanical occlusion force and its own strength and stiffness.…”

Section: Introductionmentioning

confidence: 99%

“…There are two dominant views on whether planting rebars strengthens the bonding ability: one is that scholars believe that rebars enhance the bonding effect. For example, Du [21] concluded from doublesided shear tests of OC strengthened with ultra-high performance RPC reinforcing mesh that the shear strength of the reinforced concrete was 1.37-3.11 times higher than before strengthening. Tian [26] carried out finite element simulations of the shear performance of bonding interfaces strengthened with rebars.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Planting Rebars on the Shear Strength of Interface between Full Lightweight Ceramsite Concrete and Ordinary Concrete

Zhu,

Duan,

et al. 2023

Coatings

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The use of full lightweight ceramsite concrete (FLWCC) for the repair of ordinary concrete (OC) structures has a good application prospect in the field of engineering structural strengthening. However, the interface here is less studied at present. For this purpose, 10 sets of FLWCC (new concrete)–OC (old concrete) specimens were produced for the shear test to test the bonding properties of the interface. The results showed that the damage form was changed from brittle damage to ductile damage after strengthening. It was proven that planting rebars in the interface could improve the shear performance. The interface shear strength increased with the number of rebars and it had a better effect after the number was more than 2. The strength was related to the rebar diameter and the maximum was obtained when the diameter was 8 mm. The most suitable spacing of the bars was 80 mm. The one-way analysis of variance (ANOVA) showed that the number of rebars had the greatest effect on shear strength followed by rebar diameter, while the effect of the spacing of the bars was less pronounced. Moreover, Fib’s (2010) specification of the interface shear strength formula could be used for the calculation of FLWCC–OC.

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Section: Shearing Mechanism and Comparison Of Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Planting Rebars on the Shear Strength of Interface between Full Lightweight Ceramsite Concrete and Ordinary Concrete

Zhu,

Duan,

et al. 2023

Coatings

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“…To solve the problems of poor durability and low bearing capacity of existing concrete reinforcement, a BSST between reactive powder concrete (RPC) and ordinary concrete (OC) was conducted and it was found that RPC has better bonding performance with ordinary concrete. The bonding strength of the RPC and steel mesh-reinforced OC structure can be increased by 1.37-3.11 times compared with the OC-OC interface (67).…”

Section: Bi-surface Shear Testmentioning

confidence: 99%

Effect of various interface bond tests and their failure behavior on substrate and overlay concrete -A Review

Pulkit¹,

Saini²,

Chalak³

2023

Res. Eng. Struct. Mater.

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Concrete is a widely used building material in the construction sector. Still, the lifespan of concrete is limited because many factors can influence the performance of concrete structures, which can be classified based on physical, chemical, and mechanical changes that occur during their service life. In addition, the structure's lifespan is being reduced due to adverse environmental conditions and loads. These require maintenance, restoration, or reconstruction. Therefore, considerable concrete remediation is necessary, and the best option is to repair it. However, the cost associated with restoring the deteriorating concrete structures is higher. The repaired concrete strength mainly depends on the interface layer, situated between the substrate (old) and overlay (new) concrete. The interface layer strength primarily depends on interface adhesion, friction, aggregate interlock, bonding agent, compaction, cleanliness, moisture content, concrete age, roughness, and time-dependent variables. Multiple tests are available to analyse the bonding behavior between substrate-overlay concrete. However, no particular method is available to access the bond strength. This paper describes various methods and techniques used by researchers to evaluate bond strength. The reviewed summary has shown that concrete repair is the best solution, and higher-strength concrete uses show better shear results; also, conventional concrete is more economical than higher-strength concrete. Among all the available tests the bi-surface shear test and slant shear test are the more suitable method to determine the bond strength.

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Experimental study and numerical simulation of the interfacial bonding performance of ordinary concrete reinforced with reactive powder concrete

Cited by 2 publications

References 22 publications

Effect of Planting Rebars on the Shear Strength of Interface between Full Lightweight Ceramsite Concrete and Ordinary Concrete

Effect of Planting Rebars on the Shear Strength of Interface between Full Lightweight Ceramsite Concrete and Ordinary Concrete

Effect of various interface bond tests and their failure behavior on substrate and overlay concrete -A Review

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