Interfacial Bond Properties between Normal Strength Concrete and Epoxy Resin Concrete

Sun, Nannan; Song, Yifan; Hou, Wei; Zhang, Hanhao; Wu, D.; Yuan, Liqiang; Gong, Yuan

doi:10.1155/2021/5561097

Cited by 7 publications

(6 citation statements)

References 33 publications

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“…An epoxy resin binder is commonly used for concrete interface bonding nowadays [26]. In this test, the self-proportioning cement-based interface agents J A and J B were compared with the epoxy-based concrete interface agent J C , and the state without an interface agent was used as the reference group for comparison.…”

Section: Mixing Ratio and Stirring Processmentioning

confidence: 99%

Study on the Preparation and Performance of a Prefabricated Pervious-Cement-Based Concrete Pavement Slab

Zhai

Liu

et al. 2022

Symmetry

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Based on the design of a prefabricated pervious composite cement concrete pavement slab, the interface properties and bending deformation properties of basalt pervious concrete (BPC) and PVA fiber base impervious concrete (PFBIC) composite specimens were studied. The effects of the different interfacial agents on the interfacial bonding performance were compared using a splitting tensile strength test and interfacial shear test. The deformation capacity of the composite specimens under bending load was tested using a three-point bending test, with the symmetry of the model considered and compared with the deformation capacity of the BPC specimen and PFBIC specimen. The results showed that the compressive strength of the BPC prepared using an orthogonal test reached 40.30 MPa, while the permeability coefficient was 2.41 mm/s. Different interface treatment processes determine the interface bonding properties. The best interface treatment method can induce the interface bonding strength to be higher than the strength of the BPC matrix itself, while the interface transition zone matrix will be denser without obvious microscopic defects. Under the bending tensile load, the ultimate bending stress reached 6.58 MPa and the maximum deflection in the midspan was 0.81 mm. As a protective layer, the PFBIC can alleviate the disadvantage of the insufficient strength of the BPC and can improve the bending ultimate bearing capacity of the BPC-PFBIC through its own stiffness.

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Section: Mixing Ratio and Stirring Processmentioning

confidence: 99%

Study on the Preparation and Performance of a Prefabricated Pervious-Cement-Based Concrete Pavement Slab

Zhai

Liu

et al. 2022

Symmetry

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“…Previous studies have shown that the addition of a 0.5 mm thick bonding agent to a smooth concrete surface produces the same bond strength value as a rough surface without a bonding agent [11]. This is because the bonding agent can combine the pores between the mortar material and the concrete thereby reducing porosity [12].…”

Section: Introductionmentioning

confidence: 97%

Effect of acrylic copolymer addition and interface treatment on the bond strength of polymer modified mortar and concrete

Caesar,

Kristiawan,

As’ad

2023

E3S Web Conf.

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Polymer-modified mortar is made of mortar with the addition of copolymer acrylic. An acrylic copolymer is one of the additives suitable for mortar repair because it can increase the overall durability of cement. This research investigates the bond strength between polymer-modified mortar and concrete substrate with treatment on the concrete surface. This research investigation focused on determining the effect of acrylic copolymers on bond strength. In addition, this study also investigated the effect of surface treatment with the addition of a bonding agent on bond strength. This study uses a test method: the slant shear test. The results showed that adding a bonding agent and acrylic copolymer increased the adhesive strength of the repair mortar on the concrete substrate. Generally, the higher the amount of bonding agent, the greater the expected bond strength. Meanwhile, in a ratio of 1:1.5 with cement, the acrylic copolymer can maximize bond strength.

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“…Te interfacial bond strength consists of material bonding strength, mechanical bonding strength, and shear keyway shear strength, which depends on the surface roughness, adhesive, surface cleanliness, and water content. In practical engineering, interfacial cleanliness and wetness are the basic requirements, but the stability of interfacial adhesives is difcult to control and the efect varies [11,12]. Te control of surface roughness is the most critical.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Shear Strength between Ultra-High-Performance Concrete and Normal Concrete Substrates

Jiang

Song

et al. 2023

Advances in Materials Science and Engineering

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Tunnel engineering in China has developed to the stage of both construction and maintenance, and the problem of structural defect is widespread. The cast-in-situ jacketed arch treatment takes a long time and has a great impact on traffic. It is urgent to develop prefabricated treatment technology, and the guarantee of mechanical properties of the prefabricated UHPC-post-cast NC interface is the key problem. Through the oblique shear test, combined with the XTDIC full-field strain monitoring system, the failure process and failure mode of UHPC-NC specimens were studied and analyzed under different interface keyway numbers (0, 1, 2, and 3), interface agents (meshless interface agent, cement slurry, silica fume modified cement slurry, modified cement slurry mesh, cement slurry, and expansion agent), and NC pouring grades (C30, C35, C40, and C50), as well as the influencing factors of shear strength, shear stiffness, and the slip model of the bonding interface. The results show that there are four typical failure modes in UHPC-NC under compression and shear, including complete interface failure (Class A), interface failure + NC shear failure (Class B), NC compression failure (Class C), and interface failure + NC compression failure + NC slip failure in the keyway (Class D). The complete interface failure type (Type A) without keyway treatment has sudden failure, and the keyway has the ability to disperse load and limit interface slip. The principal strain decreases along the normal sides of the interface, and the influence range of UHPC and NC sides is about 16.2 mm and 17.5 mm, respectively. In practice, the thinnest part of the treatment structure should not be less than 2 cm. The shear strength of the prefabricated UHPC-post-pouring NC interface is generally low, and the maximum shear strength of 13.9 MPa obtained by the test is still lower than the recommended value of 14–21 MPa of ACI 546.3R-14. In treatment design, the interface shear reinforcement can be introduced to ensure the cooperative bearing capacity. The shear strength of the prefabricated UHPC-post-poured NC interface is slightly affected by the interface agent and postpoured concrete grade and increases linearly with the increase in the number of keyways. When the number of keyways is equivalent to the roughness index, the relationship between the shear strength and the roughness is as follows: f s = 1.664 + 3.030 R z . Under the action of keyway, the interface slip of UHPC-NC can be simplified into four stages: the interface slip stage, the keyway strengthening stage, the shear yield stage, and the specimen failure stage. Based on this, a prefabricated UHPC-post-pouring NC interface slip model was proposed, and the experimental results of key parameters such as interface bond strength, stiffness, and slip amount at different stages were obtained by fitting. In the keyway strengthening stage, the shear stiffness increases linearly first and then tends to be stable with the increase in the number of keyways. The maximum shear stiffness is about 20 MPa/mm, and the maximum interfacial slip increases with the increase in the number of keyways, which improves the overall shear resistance. The results can be used in the design of a tunnel-fabricated treatment segment.

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Interfacial Bond Properties between Normal Strength Concrete and Epoxy Resin Concrete

Cited by 7 publications

References 33 publications

Study on the Preparation and Performance of a Prefabricated Pervious-Cement-Based Concrete Pavement Slab

Study on the Preparation and Performance of a Prefabricated Pervious-Cement-Based Concrete Pavement Slab

Effect of acrylic copolymer addition and interface treatment on the bond strength of polymer modified mortar and concrete

Experimental Investigation on Shear Strength between Ultra-High-Performance Concrete and Normal Concrete Substrates

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