A methodological review on self-healing asphalt pavements

Abstract Asphalt pavements have been extensively used in highway system. However, a great number of asphalt pavements suffer from early distresses after servicing for about 2–3 years, which leads to frequent rehabilitation and increased maintenance cost. To understand the damage propagation principle and the correlated rehabilitation measure, the progress of pavement distress rehabilitation, structural performance, and damage assessment of asphalt pavements has been explored in the perspectives of materials and structures. The current advance on the parameters for describing the cracking and rutting of asphalt pavements has been introduced. The development tendency for the damage self-healing and rehabilitation, and structural assessment has also been discussed. The study can provide a scientific guidance for understanding the generally used structural damage rehabilitation measure and performance assessment methods of asphalt pavements.

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Self-Healing Technology for Asphalt Pavements

Self-healing Materials - Advances in Polymer Science ◽

10.1007/12_2015_335 ◽

2015 ◽

pp. 285-306 ◽

Cited By ~ 20

Author(s):

Amir Tabaković ◽

Erik Schlangen

Keyword(s):

Asphalt Pavements ◽

Self Healing

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Microencapsulated Bio-Based Rejuvenators for the Self-Healing of Bituminous Materials

Materials ◽

10.3390/ma13061446 ◽

2020 ◽

Vol 13 (6) ◽

pp. 1446 ◽

Cited By ~ 6

Author(s):

Jose Norambuena-Contreras ◽

Luis E. Arteaga-Perez ◽

Andrea Y. Guadarrama-Lezama ◽

Rodrigo Briones ◽

Juan F. Vivanco ◽

...

Keyword(s):

Thermal Stability ◽

Chemical Properties ◽

The Self ◽

Asphalt Pavements ◽

Self Healing ◽

Biomass Waste ◽

Good Thermal Stability ◽

Bituminous Materials ◽

Healing Efficiency ◽

Indentation Tests

Asphalt self-healing by encapsulated rejuvenating agents is considered a revolutionary technology for the autonomic crack-healing of aged asphalt pavements. This paper aims to explore the use of Bio-Oil (BO) obtained from liquefied agricultural biomass waste as a bio-based encapsulated rejuvenating agent for self-healing of bituminous materials. Novel BO capsules were synthesized using two simple dripping methods through dropping funnel and syringe pump devices, where the BO agent was microencapsulated by external ionic gelation in a biopolymer matrix of sodium alginate. Size, surface aspect, and elemental composition of the BO capsules were characterized by optical and scanning electron microscopy and energy-dispersive X-ray spectroscopy. Thermal stability and chemical properties of BO capsules and their components were assessed through thermogravimetric analysis (TGA-DTG) and Fourier-Transform Infrared spectroscopy (FTIR-ATR). The mechanical behavior of the capsules was evaluated by compressive and low-load micro-indentation tests. The self-healing efficiency over time of BO as a rejuvenating agent in cracked bitumen samples was quantified by fluorescence microscopy. Main results showed that the BO capsules presented an adequate morphology for the asphalt self-healing application, with good thermal stability and physical-chemical properties. It was also proven that the BO can diffuse in the bitumen reducing the viscosity and consequently self-healing the open microcracks.

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Laboratory and Statistical Analysis of the Fatigue Response of Self-Healing Asphalt Mixtures Containing Metal By-Products

Coatings ◽

10.3390/coatings11040385 ◽

2021 ◽

Vol 11 (4) ◽

pp. 385

Author(s):

Marta Vila-Cortavitarte ◽

Daniel Jato-Espino ◽

Daniel Castro-Fresno ◽

Miguel Á. Calzada-Pérez

Keyword(s):

Asphalt Concrete ◽

Asphalt Pavement ◽

Fatigue Behavior ◽

Asphalt Mixtures ◽

Environmental Benefits ◽

Asphalt Pavements ◽

Similar Response ◽

Self Healing ◽

By Products ◽

Industrial Sand

Fatigue is one of the main forms of deterioration in asphalt mixtures, endangering their service life due to the progressive appearance and expansion of cracks. A sustainable approach to increase the lifetime of asphalt pavement has been found in self-healing technology, especially if boosted with metal by-products due to their economic and environmental interest. Under these circumstances, this research addressed the fatigue behavior of self-healing asphalt mixtures including industrial sand blasting by-products obtained from sieving and aspiration processes. Hence, a uniaxial fatigue test was carried out to determine whether these experimental mixtures can provide a similar response to that of a reference asphalt concrete (AC-16). This analysis was undertaken with the support of descriptive and inferential statistics, whose application proved the absence of significant differences in the fatigue performance of self-healing experimental mixtures with respect to conventional asphalt concrete. These results suggest that designing self-healing mixtures with metal by-products is a sustainable approach to increase the lifetime of asphalt pavements, while contributing to the circular economy through diverse economic and environmental benefits.

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Analysis of the scientific evolution of self-healing asphalt pavements: Toward sustainable road materials

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.126107 ◽

2021 ◽

Vol 293 ◽

pp. 126107

Author(s):

Kevork Micael Nalbandian ◽

Manuel Carpio ◽

Álvaro González

Keyword(s):

Asphalt Pavements ◽

Self Healing ◽

Road Materials

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Smart Self-Healing Capability of Asphalt Material Using Bionic Microvascular Containing Oily Rejuvenator

Materials ◽

10.3390/ma14216431 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6431

Author(s):

Peng Yang ◽

Li-Qing Wang ◽

Xu Gao ◽

Sai Wang ◽

Jun-Feng Su

Keyword(s):

Healing Process ◽

Healing Time ◽

The Self ◽

Asphalt Pavements ◽

Self Healing ◽

Microstructure Observation ◽

Micro Cracks ◽

Healing Efficiency ◽

Healing Temperature ◽

The Individual

It has become one of the research directions of intelligent materials for self-healing asphalt pavements to use a bionic microvascular containing oily rejuvenator. The rejuvenator in a microvascular can carry out the healing of asphalt micro-cracks, thus reducing the damage to and prolonging the life of asphalt pavement. The aim of this work was to investigate the smart self-healing capability of an asphalt/microvascular material through its microstructure and mechanical properties. Microstructure observation indicated no interface separation between the microvasculars and bitumen matrix. Micro-CT images showed that microvasculars dispersed in asphalt samples without accumulation or tangles. The phenomenon of microcracks healing without intervention was observed, which proved that the fractured asphalt sample carried out the self-healing process with the help of rejuvenator diffusing out from the broken microvasculars. The self-healing efficiency of asphalt samples was also evaluated through a tensile test considering the factors of microvasculars content, healing time and healing temperature. It was found that the tensile strength of the asphalt samples was greatly enhanced by the addition of microvasculars under a set test condition. Self-healing efficiency was enhanced with more broken microvasculars in the rupture interface of the asphalt sample. During two self-healing cycles, the self-healing efficiency of the asphalt sample with three microvascular per 1 cm2 of a broken interface were able to reach 80% and 86%. This proves that microvasculars containing rejuvenator play a practical role in the self-healing process of asphalt. With an increase in temperature from 0 to 30 °C, the self-healing capability of the asphalt samples increased dramatically. An increase in time increased the self-healing capability of the bitumen samples. At last, a preliminary mathematical model also deduced that the self-healing efficiency was determined by the individual healing steps, including release, penetration and diffusion of the rejuvenator agent.

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