Factors influencing the performance of cement emulsified asphalt mortar – A review

Jiang, Shunjun; Li, Jiusu; Zhang, Zhu; Wu, Hongshan; Liu, Guanlan

doi:10.1016/j.conbuildmat.2021.122479

Cited by 30 publications

(6 citation statements)

References 65 publications

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“…These industrial changes and policy requirements are urging researchers to develop sustainable pavement engineering, especially with high-performance materials and low-carbon-emission construction methods [6,7]. Previous studies have shown that emulsified asphalt can offer benefits such as improved workability, reduced energy consumption, enhanced resistance to cracking and rutting, and an extended service life [8,9].…”

Section: Introduction 1research Backgroundmentioning

confidence: 99%

Effects of Epoxy Resin Value on Waterborne-Epoxy-Resin-Modified Emulsified Asphalt Mixture Performance

Wang,

Zhang,

Liu

et al. 2024

Applied Sciences

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Although research shows that waterborne epoxy resin emulsified asphalt (WER-EA) is an environmental protection material with potential high resistance to multiple types of pavement distress, its performance is rather complicated and much affected by the curing agent and epoxy resin value. This paper serves as a follow-up study to the preliminary published research on evaluating the impact of the epoxy value and common curing agents on the performance of asphalt mixtures. Four groups of emulsified asphalt were filtered out to prepare mixture samples, and laboratory tests on mixture performance under high and low temperatures were conducted. Specifically, Marshall and rutting tests were conducted for evaluating mixture resistance to rutting under high temperatures, and indirect tensile tests were conducted to indicate resistance to cracking at low temperatures. Water stability performance was also assessed by comparing the mixture properties before and after water absorption. The results showed that the mixture with an epoxy value of 20 and curing agents using triethylenetetramine (TETA) had the best overall performance among the investigated mixtures, with the highest resistance to high-temperature deformation and water damage. However, more research should be conducted to improve the low-temperature resistance to cracking for WER-EA mixtures.

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Section: Introduction 1research Backgroundmentioning

confidence: 99%

Effects of Epoxy Resin Value on Waterborne-Epoxy-Resin-Modified Emulsified Asphalt Mixture Performance

Wang,

Zhang,

Liu

et al. 2024

Applied Sciences

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“…In the meantime, the bonding between old and fresh asphalt mixtures is relatively weaker, and the penetration depth of fresh asphalt is low in small cracks, which limits its application in pavement repair [ 5 ]. As a supplement, various special polymer materials, including emulsified asphalt [ 6 ], polyurethane (PU) [ 7 ], and epoxy resin (ER) [ 8 ] have been adopted in pavement engineering. Polymer materials exhibit several excellent performances in terms of the corrosion resistance [ 9 ], inflaming retarding [ 10 ], thermal stability [ 11 ], and fracture toughness [ 12 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Properties and Its Prediction of Polymer Concrete for the Repair of Asphalt Pavements

Ren

2022

Polymers

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Polymer concrete (PC) is considered a promising repair material for asphalt pavement, since it has excellent paving performance and water stability. Although the mechanical properties of PC have been widely researched, the fatigue behavior of PC under traffic loads was still poorly understood. To predict the fatigue life and optimize the material design of PC, the semi-circular bending (SCB) tests were performed, considering different polymer content, sand ratio, aggregate features and stress condition. Two typical polymer materials were applied to prepare PC specimens, including epoxy resin (ER) and polyurethane (PU). The aggregate features were analyzed by the aggregate image measurement system. The mechanical behavior under repeated loads was investigated by the displacement, fatigue life and stiffness modulus. Results show that the flexural strength increases nonlinearly with the increasing polymer content, rapidly at first, and then slowly. The optimized polymer content and sand ratio were respectively 15% and 30%. As the loading number increases, the vertical displacement of PC shows three stages, i.e., undamaged stage, damage development stage, and fatigue failure stage. The stiffness modulus of the specimen is stress-dependent. An empirical model was developed to predict the fatigue life of PC, which can effectively capture the effects of the polymer content, sand ratio and stress level (or nominal stress ratio). It suggests that the fatigue life has a strong correlation with the mixing gradation, and the optimal sand ratio of PC can be determined by the proposed function. Moreover, the effect of aggregate shapes cannot be neglected.

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“…However, the low demulsification speed of emulsified asphalt, particularly early in the process, restricts the use of emulsified asphalt mixtures (Baoju et al, 2022). The demulsification process of emulsified asphalt is determined by a range of factors, such as aggregate properties (Xu et al, 2017;Wang et al, 2021), the types and dosage of emulsified asphalt (Jin et al, 2013;Li and Wang 2014;Xiao et al, 2019;Li et al, 2021), temperature (Baoju et al, 2022), additives (Jiang et al, 2021), pH (Fajun et al, 2020), oil-water interface tension (Tao et al, 2015), and various combinations of materials and construction characteristics (Baoju et al, 2022). The aggregate typically accounts for more than 90% of the weight of the asphalt mixture (Pan et al, 2017).…”

Section: Introduction 1emulsified Asphalt Demulsificationmentioning

confidence: 99%

Influence of aggregate chemical composition on the demulsification rate of emulsified asphalt

et al. 2022

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Efficient demulsification is vital for the application of emulsified asphalt in road construction. In this paper, the effects of the main chemical components of the aggregates (CaCO3, MgO, Fe2O3, SiO2, Al2O3) on the demulsification process of emulsified asphalt were studied by experiment and simulation using a Gompertz model. The findings indicate that the surface energy, specific surface area, and pH of the chemical components of the aggregates are the most important factors influencing the demulsification speed of the emulsified asphalt. The choice of the aggregate’s main chemical components can accelerate demulsification speed, with the acceleration effect of Al2O3 on anionic (SDBS) emulsified asphalt and MgO on cationic (STAC) emulsified asphalt both reaching 60%. The fit between the Gompertz model and the experimental viscosity curve is greater than 0.93, which verifies the utility of using the Gompertz approach for studying emulsified asphalt-aggregate mortar viscosity changes. A demulsification evaluation function φ(t) of emulsified asphalt is proposed based on the parameters of the Gompertz model. When φ(t) is close to 1, the emulsified asphalt-aggregate mortar is fully demulsified, and setting φ(t)=1 allows the demulsification time of the emulsified asphalt-aggregate mortar to be calculated from the Gompertz model parameters.

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Factors influencing the performance of cement emulsified asphalt mortar – A review

Cited by 30 publications

References 65 publications

Effects of Epoxy Resin Value on Waterborne-Epoxy-Resin-Modified Emulsified Asphalt Mixture Performance

Effects of Epoxy Resin Value on Waterborne-Epoxy-Resin-Modified Emulsified Asphalt Mixture Performance

Fatigue Properties and Its Prediction of Polymer Concrete for the Repair of Asphalt Pavements

Influence of aggregate chemical composition on the demulsification rate of emulsified asphalt

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