Understanding the final surface state of self-healing microcapsules containing rejuvenator in bituminous binder of asphalt

Su, Jun-Feng; Wang, Liqing; Xie, Xin-Ming; Gao, Xu

doi:10.1016/j.colsurfa.2021.126287

Cited by 10 publications

(9 citation statements)

References 19 publications

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“…It is still the most mature technology for extrinsic self-healing bitumen in material preparation and application. It is worth mentioning that the world’s first self-healing asphalt pavement using microcapsules containing rejuvenators was built in Tianjin city in China, in 2014 [ 11 ]. It was found that the microcracks in this pavement decreased by 75% in five years compared to the nearby pavement without self-healing microcapsules [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…It is worth mentioning that the world’s first self-healing asphalt pavement using microcapsules containing rejuvenators was built in Tianjin city in China, in 2014 [ 11 ]. It was found that the microcracks in this pavement decreased by 75% in five years compared to the nearby pavement without self-healing microcapsules [ 11 ]. This material has been widely used in China, becoming a typical commercial self-healing microcapsule material for smart pavements [ 6 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…It was found that the microcracks in this pavement decreased by 75% in five years compared to the nearby pavement without self-healing microcapsules [ 11 ]. This material has been widely used in China, becoming a typical commercial self-healing microcapsule material for smart pavements [ 6 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Because of the considerable research and commercial value, more and more researchers have invested in the study of this material. The literature research found that the most applied chemical fabrication methods of microcapsules are spraying and coacervation, in situ polymerization, emulsion polymerization, interfacial polymerization, and layer-by-layer deposition [ 10 , 11 ]. Various studies have indicated that the melamine-formaldehyde polymer is the most applied polymeric shell for microcapsule fabrication through in situ polymerization because it can nearly meet all the requirements during the self-healing process [ 4 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…It is required that microcapsules must be prepared with good thermal stability to resist the high temperature of bitumen [ 10 ]. Moreover, these core/shell structural microcapsules meet specific requirements, including size distribution, and non-biodegradable and mechanical properties [ 8 , 10 , 11 , 12 ]. During the chemical polymerization method, the microcapsules’ cost, complexity, and capacity need to be considered for the construction industry [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

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Multiscale Mathematical Analysis of Influencing Factors and Experimental Verification of Microcrack Self-Healing Efficiency of Bitumen Composites Using Microcapsules

et al. 2023

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The preparation and application of microcapsules containing healing agents have become a crucial way to enhance the self-healing capability of bitumen. This intelligent material has become a hot topic in the field of pavement material and has greatly stimulated the development and applications of pavement engineering. However, there has been no research focused on the relationship of the multistructures from the viewpoint of molecular-size, microsize, and macrosize, which significantly limits the predictions of the self-healing efficiency and structure design of this self-healing material. The purpose of this study was to make a mathematical analysis of the influencing factors of self-healing efficiency based on the self-healing mechanism of bitumen using microcapsules, fully considering the structural dimensions, preparation conditions, and self-healing conditions. In the mathematical analysis, the cross-linking degree of the shell material molecules of the microcapsules was considered for its damage strength from the perspective of molecular structure. The final tip stress of the microcrack was believed to be equal to the puncture strength of the microcapsules in terms of microsize. From a macroscale point of view, the amount of healing agent released from the microcapsule rupture was considered more significant than or equal to the volume of the microcracks. At the same time, the time–temperature superposition principle was applied to simplify the influence factors. The above derivation based on multiscale structures found that the additive amount of the microcapsules, temperature, and time were the three main influencing factors on the self-healing features of bitumen. Finally, the experimental data was investigated considering the three factors, which thoroughly verified the feasibility of the derivation. All results will help to establish a bridge between the initial structural design of self-healing bitumen and the prediction of the final self-healing effects.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multiscale Mathematical Analysis of Influencing Factors and Experimental Verification of Microcrack Self-Healing Efficiency of Bitumen Composites Using Microcapsules

et al. 2023

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The self-healing performance of asphalt binder and mixtures: a state-of-the-art review

Jwaida,

Dulaimi,

Mydin

et al. 2024

Innov. Infrastruct. Solut.

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The intrinsic ability of asphalt pavement to undergo self-healing is not sufficient enough to effectively repair fractures resulting from a range of variables, including traffic load, asphalt aging and weather conditions. Consequently, the field of self-healing technology is focused on advancing crack repair techniques by employing microwave and induction heating and encapsulation amongst other healing procedures. These approaches make use of a range of additives, including waste materials and polymers, to facilitate the healing process. The present paper provides an in-depth review of self-healing technologies used for asphalt pavements, this including their conceptualization, development, application and the methods used to evaluate its performance. The self-healing capacity of materials can be influenced by various parameters including humidity, molecular diffusion, induction conditions, temperature and time. As such, treatments have the potential to enhance self-healing capacity, but with varying degrees of success depending on the specific evaluation indicator and healing situation. By examining international research, this review will also draw attention to the global relevance of the applicability of asphalt self-healing techniques used to enhance the durability and sustainability of transportation infrastructures worldwide. This paper therefore, serves as a valuable resource for researchers, practitioners and policymakers engaged in the pursuit of innovative solutions for resilient and cost-effective pavement systems on an international scale. This review also proposes prospective pathways for further study that will serve as a basis for future development of the industry.

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Object status identification of X-ray CT images of microcapsule-based self-healing mortar

Wang

Chen

Ren

et al. 2022

Cement and Concrete Composites

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Understanding the final surface state of self-healing microcapsules containing rejuvenator in bituminous binder of asphalt

Cited by 10 publications

References 19 publications

Multiscale Mathematical Analysis of Influencing Factors and Experimental Verification of Microcrack Self-Healing Efficiency of Bitumen Composites Using Microcapsules

Multiscale Mathematical Analysis of Influencing Factors and Experimental Verification of Microcrack Self-Healing Efficiency of Bitumen Composites Using Microcapsules

The self-healing performance of asphalt binder and mixtures: a state-of-the-art review

Object status identification of X-ray CT images of microcapsule-based self-healing mortar

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