Abstract In recent decades, researchers have revealed the great healing potential of asphalt and proposed various novel methods to inspire improve self‐healing capacity aimed prolong service life pavement. this review, up date research progresses in induction embedded rejuvenator encapsulation are presented, respectively. Meanwhile, trial section applications capsule highlighted, which show promising results. Finally, some recommendations for future development proposed.

This paper explores the potential use of compartmented alginate fibres as a new method incorporating rejuvenators into asphalt pavement mixtures. The are employed to locally distribute rejuvenator and overcome problems associated with spherical capsules hollow fibres. work presents proof concept encapsulation process which involved embedding mastic mixture survival rate in mixture. To prove effectiveness encapsulating material demonstrate its ability survive production process, containing...

Self-healing asphalt, aimed to produce a sustainable asphalt pavement using green technology, has been studied in the past two decades. Technologies including encapsulated rejuvenator and induction heating have proposed, demonstrated laboratory, gradually evaluated field application. This paper looks into synergy effect of above technologies, where serves as damage repair mechanism, requiring just 2 min time will replenish (rejuvenate) aged binder reinstate bitumen's healing ability....

Improving the healing capacity of asphalt is proving to be an effective method prolong service life pavement. The calcium alginate capsules encapsulating rejuvenator have been developed and proved provide successful localized crack in mastic. However, it not known whether this self-healing system will improve a full mix. To aim, paper reports on study which investigate effect onto porous X-ray computed tomography (XCT) was used visualize distribution asphalt. fracture resistance concrete...

Rejuvenator encapsulation technique showed great potential for extrinsic asphalt pavement damage healing. Once the capsules are embedded within pavement, healing is activated on-demand via progressing microcrack. When microcrack encounters capsule, fracture energy at tip opens capsule and releases rejuvenator. Then released rejuvenator wets crack surfaces, diffuses into softens aged bitumen, allowing two broken edges to come in contact, preventing further deterioration. The quality speed of...

This paper presents the physical properties of recycled asphalt pavement (RAP) and its influence on mechanical performance a binder course mix. A series mixes were designed containing varying percentages RAP. mix made from only virgin material was selected as control for investigation. The effect introducing RAP into evaluated through laboratory tests including Marshall test, indirect tensile stiffness modulus fatigue test water sensitivity test. circular wheel track (CWT) developed in order...

It has been demonstrated that calcium alginate capsules can be used as an asphalt healing system by pre-placing rejuvenator (healing agent) into the mix and releasing on demand (upon cracking). This mechanism relies properties of which are determined capsule preparation process. In this study, to optimize capsules, prepared using varying Alginate/Rejuvenator (A/R) ratios. Light microscope microscopy Environmental Scanning Electron Microscope (ESEM) employed characterize morphology...

This article presents development of a novel self-healing technology for asphalt pavements, where binder rejuvenator is encapsulated within the compartmented alginate fibres. The key objective study was to optimise fibre design, i.e., maximising amount fibre. results demonstrate that optimum content in 70:30 rejuvenator/alginate ratio. fibres are sufficient thermal and mechanical strength survive harsh mixing compaction processes. Furthermore, illustrate zeer open asfalt beton (ZOAB) mix...

This paper explores the potential methods for evaluating a healing system asphalt pavements. The under investigation involves compartmented calcium-alginate fibres encapsulating an binder agent (rejuvenator). presents novel method of incorporating rejuvenators into pavement mixtures. are used to distribute rejuvenator throughout mixture, thereby overcoming some problems associated with alternate methods, i.e., spherical capsules and hollow fibres. efficiency be evaluated in this include: (i)...

Microwave heating has been shown to be an effective method of asphalt concrete and in turn healing the damage. As such, microwave holds great potential rapid (1–3 min) damage healing, resulting improvement service life, safety, sustainability pavement. This study focused on effect porous concrete. Steel wool fibres were incorporated into improve efficiency, optimum time was determined. Afterwards, efficiency evaluated using a semi–circular bending programme. The results show that is largely...

A problem increasingly faced by airport authorities is the maintenance of runways. Due to their large aircraft loadings associated with take-off and landing operations, runways experience surface deterioration. Poor quality runway surfaces cannot be tolerated in such an environment. Maintenance issues must carried out maximise safety minimise risk damage. recent development has been introduction self-healing technologies as rejuvenator encapsulation, induction microwave heating address these...

Self-healing asphalt, which is designed to achieve autonomic damage repair in asphalt pavement, offers a great life-extension prospect and therefore not only reduces pavement maintenance costs but also saves energy CO2 emissions. The combined self-healing system, incorporating both encapsulated rejuvenator induction heating, can heal cracks with melted binder aged rejuvenation, the synergistic effect of two technologies shows significant advantages healing efficiency over single method. This...

Bitumen rejuvenators are used to improve or restore the physical and mechanical performance of aged bitumen. Traditional bitumen a product crude oil. As oil production declines environmental financial costs increase, there is an urgent need identify more environmentally sustainable rejuvenator alternatives. generated from biological sources offer friendly economically viable alternative oil-based rejuvenators. This paper describes study wherein microalgae was as rejuvenator. The chemical,...

Bitumen is a key constitutive material in asphalt pavements. It binds together the rock scaffolding of pavement. provides pavement with flexibility and enables it to respond traffic loading return its original condition after loading, i.e. bitumen restores/repairs damage. In Porous Asphalt (PA) or Stonemastic Mix (SMA) mixtures, due open graded structure, modifiers are used improve restore physical mechanical performance. Traditionally made products crude oil, such as: ethylene vinyl acetate...

This paper explores the potential use of conductive alginate capsules encapsulating a bitumen rejuvenator as new extrinsic self-healing asphalt method. The combine two existing technologies: (1) encapsulation and (2) induction heating to create system that will provide rapid effective pavement repair. work presents proof concept for process, which involves embedding into mortar mixture survival rate in mixture. A drip capsule production process was adopted scaled up 20l wet at 0.22 l/min. To...

Conductive alginate capsules encapsulating a bitumen rejuvenator (HealRoad capsules) has demonstrated good healing abilities in pure and mortar mixes. HealRoad can efficiently heal damage via induction heating. They also release the encapsulated rejuvenator, thereby rejuvenating aged bitumen. These findings indicate that heating systems combined could represent possible asphalt pavement maintenance method. This paper investigated effect of on mechanical performance 10 mm stone mastic mix...

Induction healing is a proven technology which able to improve the self-healing capacity of asphalt concrete. Healing achieved via electromagnetic current produced by passing induction machine, where steel constituents heat up in turn soften bitumen layer, allowing it flow and close cracks, repairing damage. This paper reports on study investigated influence ageing Porous Asphalt (PA) concrete mix was prepared first, then subjected an accelerated (laboratory) process using ventilated oven....