Effect of waste rubber particles on the mechanical performance and deformation properties of epoxy concrete for repair

Shao, Jianwen; Zhu, Han; Zuo, Xian; Lei, Wolong; Borito, Said Mirgan; Liang, Jüping; Duan, Fuqiang

doi:10.1016/j.conbuildmat.2020.118008

Cited by 51 publications

(15 citation statements)

References 56 publications

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“…erefore, in terms of the mechanical properties of the mixture, the optimum mechanical properties were achieved when the rubber powder replacement rate was lower than 45%. Shao et al [23] reported the effect of different rubber powders on the mechanical properties of epoxy concrete and concluded that the addition of rubber powder would reduce the strength of epoxy concrete and improve its deformation properties. In the report, the compressive strength, bending tensile strength, and bending strain of epoxy concrete with different rubber contents range from 40 to 67 MPa, 4.5 to 6.7 MPa, and 0.1 to 0.2%, respectively, which are quite Advances in Materials Science and Engineering different from the mechanical properties of rubber epoxy concrete in this paper, especially the flexural tensile strength and flexural strain.…”

Section: Effect Of Rubber Powder Replacement Rate On Mechanicalmentioning

confidence: 99%

Design and Performance of Ultrathin Overlay Epoxy‐Rubber Concrete

Huang

Chen

2021

Advances in Materials Science and Engineering

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Epoxy-rubber concrete has a big potential to be used for pavement overlays, but there is currently no appropriate epoxy-rubber concrete design method and process. To explore the reasonable mix design process of epoxy-rubber concrete, the ultrathin overlay aggregate gradation and epoxy resin binder with high toughness and durability were selected to carry out the design process investigation of epoxy-rubber concrete. The performance of epoxy-rubber concrete was characterized by vibration compaction, repeated load CBR, porosity, Fort Kentucky, uniaxial compression, bending, rutting, antiskid performance, and noise-reduction performance test. Firstly, the optimum range of the rubber powder replacement rate was determined based on the porosity and deformation characteristics of the aggregate mixture. Then, the amount of epoxy resin binder was further determined based on the porosity and antistripping performance of the epoxy-rubber concrete. Finally, the mechanical properties, road performance, and functions of epoxy-rubber concrete were comprehensively considered to determine the optimum rubber power replacement rate obtaining the composition design of epoxy-rubber concrete. The results showed that adding rubber powder decreased the elastic modulus and plastic deformation of the mineral structure, enhancing the suitability of the mixture for flexible road pavements. However, when the replacement rate increased to a specific range, the rubber particles significantly interfered with the mineral material, worsening the stability of the structure. Therefore, it was preliminarily determined that the reasonable replacement rate of rubber powder was 30–50%. The ultrathin overlay epoxy-rubber concrete exhibited excellent antistripping performance, and its porosity increased with the epoxy resin dosage. The optimum epoxy content was 6.5% at 4.17% porosity. Within the preliminarily determined replacement rate range of rubber particles, as the replacement rate increased, the flexibility, high-temperature stability, antiskid performance, and shock and noise resistance of the mixture increased, but the compressive and flexural tensile strength values decreased. The integrated properties of the ultrathin overlay epoxy-rubber concrete indicated that the best replacement rate of rubber powder was 45%. In this paper, the replacement rate range of the rubber powder was initially determined based on the gradation composition of the mixture, which avoids blind determination of the replacement rate. And the composition of the concrete was obtained comprehensively by the performance and function of the epoxy-rubber concrete, which is reasonable and reliable. The epoxy-rubber concrete design method proposed in this paper can promote the application the epoxy-rubber concrete in pavement overlay engineering.

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Section: Effect Of Rubber Powder Replacement Rate On Mechanicalmentioning

confidence: 99%

Design and Performance of Ultrathin Overlay Epoxy‐Rubber Concrete

Huang

Chen

2021

Advances in Materials Science and Engineering

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“…ey conducted that the compressive strength of polymer and polymer concrete are related to the compressive modulus and splitting tensile strength while presenting a constitutive model for predicting the compressive stress-strain behavior [15]. Shao et al [16] studied the mechanical properties of epoxy concrete by compressive, flexural, spilt, deflection, and strain experiments with added different percentages of fine, medium, and coarse rubber particles (5%, 10%, 15%, 20%, and 25%). ey found that rubber in epoxy concrete helps in increasing the deformability while maintaining a sufficient interface resistance as a repair material.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, research about epoxy resin concrete needs further study because some weaknesses still need to be improved and optimized [16]. Ample research showed one of the crucial issues about the application of epoxy resin concrete which is the interface separation resulting from the distinct characteristics of epoxy-based and cement-based materials in collaboration and even the problems with stress concentration and premature destruction [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Interfacial Bond Properties between Normal Strength Concrete and Epoxy Resin Concrete

Sun

Song

Hou

et al. 2021

Advances in Materials Science and Engineering

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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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“…Until now, many researches have been conducted on EPC, including its quasi-static mechanical properties such as bending and compressive strengths. Also, possible solutions to optimize the performance of EPC such as improving the rubber-to-stone ratio [ 12 , 13 ] and adding reinforcing materials [ 14 , 15 , 16 , 17 ] have been proposed. Environmental hazards such as ultraviolet radiation, temperature and chemical media will weaken the performance of epoxy resin-based composite materials [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Dynamic Mechanical Properties of Epoxy Polymer Concrete under Ultraviolet Aging

Liao

Liu

et al. 2021

Materials

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Epoxy polymer concrete (EPC) is widely applied in engineering for its excellent mechanical properties. The impact loads and severe climatic conditions such as ultraviolet radiation, temperature change and rain erosion are in general for its engineering practice, potentially degrading the performance of EPC. In this paper, a procedure of accelerated aging for EPC, imitating the aging effect of ultraviolet radiation and hygrothermal conditions based on the meteorological statistics of Guangzhou city, was designed. After various periods of accelerated aging, the dynamic behaviors of EPC were studied by using a Split Hopkinson Pressure Bar (SHPB). The verification of the experimental data was performed. The two-stage dynamic compression stress-strain curves were obtained: (a) linear growth stage following by strain hardening stage at impact velocity 12.2 m/s and 18.8 m/s, (b) linear growth stage and then a horizontal stage when impact velocity is 25.0 m/s, (c) linear growth stage following by strain softening stage at impact velocity 29.2 m/s. The experimental results show that the specimens after longer accelerated aging tend to be more easily broken, especially at impact velocity 12.2 m/s and 18.8 m/s, while the strain rate is the main factor affecting the compression strength and stiffness. Ultimately the influence of strain rate and equivalent aging time on dynamic increase factor was revealed by a fitting surface.

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Effect of waste rubber particles on the mechanical performance and deformation properties of epoxy concrete for repair

Cited by 51 publications

References 56 publications

Design and Performance of Ultrathin Overlay Epoxy‐Rubber Concrete

Design and Performance of Ultrathin Overlay Epoxy‐Rubber Concrete

Interfacial Bond Properties between Normal Strength Concrete and Epoxy Resin Concrete

An Experimental Study on the Dynamic Mechanical Properties of Epoxy Polymer Concrete under Ultraviolet Aging

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