Review on the self-healing of asphalt materials: Mechanism, affecting factors, assessments and improvements

Liang, Bo; Lan, Fang; Shi, Kai; Qian, Guoping; Liu, Zhengchun; Zheng, Jianlong

doi:10.1016/j.conbuildmat.2020.120453

Cited by 115 publications

(27 citation statements)

References 140 publications

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“…Researchers have established many different self-healing concrete methods and mechanisms. Existing self-healing concrete formulations can be roughly split into two categories: autonomous and autogenous [9,10]. Autonomous healing concrete designs mainly emphasize the self-healing potential of the concrete itself, that is, further hydration of cement-based materials such as carbonation and pozzolanic reaction [11,12].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Mechanical Properties of Microcapsule-Based Self-Healing Cementitious Composites

et al. 2021

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Self-healing concrete designs can protect against deterioration and improve durability. However, there is no unified conclusion regarding the effective preparation and mechanical properties of self-healing concrete. In this paper, microcapsules are used in cement-based materials, the reasonable dosage of microcapsules is determined, and the self-healing performance of the microcapsule self-healing system under different curing agents is explored. The microcapsules and curing agent are shown to enhance the flexural and compressive strength of mortar specimens at relatively low contents. The optimal microcapsule content in terms of compressive strength is 1–3%. When the content of the microcapsule reaches 7%, the strength of the specimen decreases by approximately 30%. Sodium fluorosilicate is better-suited to the microcapsule self-healing cement-based system than the other two fluorosilicates, potassium fluorosilicate and magnesium, which have similarly poor healing performance as curing agents. Healing time also appears to significantly influence the microcapsule self-healing system; mortar specimens that healed for 28 days are significantly higher than those that healed for 7 days. This work may provide a valuable reference for the design and preparation of self-healing cementitious composite structures.

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Section: Introductionmentioning

confidence: 99%

Preparation and Mechanical Properties of Microcapsule-Based Self-Healing Cementitious Composites

et al. 2021

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“…Regarding ionomer use, physical ionic cluster crosslinking can present the network structure of polymer-modified asphalt [99]. Shi [100] addressed the rheological properties of an asphalt binder modified with an ionomer (ethylene and methacrylic acid systems) and reported the best ionomer content of 5 % [100].…”

Section: Self-healing Capability By the Addition Of Nanomaterials Or Healing Agentsmentioning

confidence: 99%

Review and analysis of advances in functionalized, smart, and multifunctional asphalt mixtures

Segundo

Freitas

Branco

et al. 2021

Renewable and Sustainable Energy Reviews

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Road pavements are designed to withstand road traffic and weathering actions while ensuring comfortable and safe riding conditions as well as low costs and damage to the environment. When a road pavement has additional abilities or reacts to an external stimulus, it is considered to be smart and multifunctional. Examples of such abilities that have been investigated in asphalt mixtures are photocatalytic, superhydrophobic, self-cleaning, deicing/anti-icing, self-healing, thermochromic, and latent heat thermal energy storage abilities. These abilities are developed using different materials such as nano/microparticles (including semiconductor materials and microcapsules), fibers, phase change materials (PCMs), and dyes, often using dissimilar techniques such as spray coating, volume incorporation, spreading, and asphalt binder modification. Owing to their large surface areas, road pavements are true recipients for large amounts of nano/micromaterials, and consequently, act as important "tools" to stimulate an emerging sector related to the scale of production of materials in the form of nanoparticles. Moreover, smart and multifunctional road pavements can be included in the domain of clean technology (e.g., photocatalytic pavements that promote the environmental depollution of NO x -type gases emitted as vehicle exhaust gases). In this context, they can contribute to materializing the transition to a novel socioeconomic model known as "Green Recovery" that is environmentally friendly, sustainable, and inclusive. This model is a very important path toward economic and employment recovery, a vision to which many countries are strongly committed. Therefore, this work reviews new capabilities imparted to asphalt mixtures and provides recommendations.

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“…e preliminary analysis for production and cost was conducted by Bevacqua et al [36]. e results show that the performance of microwave healing in terms of cost-saving for a lifespan of 100 years is improved compared to a traditional method, such as reconstructing the asphaltic layer that requires transportation and additional resource [37]. Microwave heating is usually considered a potential technique for stimulating the self-healing of composite materials, very much similar to induction heating.…”

Section: Induced Healing Via Microwave Heatingmentioning

confidence: 99%

“…Microwave heating is usually considered a potential technique for stimulating the self-healing of composite materials, very much similar to induction heating. Asphalt mixtures here are mostly exposed to alternating electromagnetic fields under high frequencies (in the order of megahertz) by using an electromagnetic radiation device like a microwave, which is environmentally friendly due to the reduction of carbon dioxide emission [37,38]. is heating effect has been established to affect the properties of both water and bitumen in asphalt mixtures [35], wherein it induced a change in the orientation of their polar molecules as a result of alternating magnetic fields.…”

Section: Induced Healing Via Microwave Heatingmentioning

confidence: 99%

A Review of Asphaltic Crack Healing Approaches and Its Mechanism

Ghazali

Hasan

Seman

et al. 2021

Advances in Materials Science and Engineering

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The concept of self-healing has an excellent potential to extend the life of asphalt pavement. This technology can be considered a sustainable technology due to its ability to reduce the utilization of asphalt mixture production materials used for road maintenance, polluting the environment. It is a complex physicochemical process wherein the molecular diffusion healing mechanisms in asphalt materials are inspired by self-healing polymeric systems, which describe the self-recovery behaviors based on polymer chain dynamics. Several methods have been adopted to improve the self-healing of asphalt, one of which is induction healing. It is the process of heating the asphalt pavement incorporated with an electrically conductive material such as steel fibers, wherein asphalt healing is undertaken via electric field induction. Induction healing via induction heating occurs with eddy current where the electric current flows within the conductive fibers when magnetically susceptible under the magnetic field. Microwave heating is another self-healing method similar to induction in which magnetic radiation is employed to treat asphalt mixtures instead of the electric field-induced induction healing processes. The conductive fibers can absorb the electromagnetic (EM) waves to convert them into heat energy through doublet polarization, interface polarization, and electrical conduction dissipation when placed in the microwave field. These two types of heating systems, which are induction heating and microwave heating, are compared and discussed thoroughly in this study. Finally, some recommendations for the future development of self-healing asphalt are proposed.

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Review on the self-healing of asphalt materials: Mechanism, affecting factors, assessments and improvements

Cited by 115 publications

References 140 publications

Preparation and Mechanical Properties of Microcapsule-Based Self-Healing Cementitious Composites

Preparation and Mechanical Properties of Microcapsule-Based Self-Healing Cementitious Composites

Review and analysis of advances in functionalized, smart, and multifunctional asphalt mixtures

A Review of Asphaltic Crack Healing Approaches and Its Mechanism

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