Microwave crack healing on conventional and modified asphalt mixtures with different additives: an experimental approach

González, Ana Marta; Valderrama, Jonathan; Norambuena-Contreras, José

doi:10.1080/14680629.2019.1587493

Cited by 43 publications

(14 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, the performance was irregular in the case of porous mixtures (PA) [4.5% of addition], being less efficient than the control specimens. On the contrary, the PA mixtures showed a good performance with the short steel wool fibres (5 mm) [0.4% of fibres], which produced a 5.6% of time reduction (González et al 2019). • The addition of short steel wool fibres (5 mm) [at 0.4%] proved to be more efficient than the 10 mm fibres [at 0.6%].…”

Section: Effect Of Different Steel Additions On the Heating Speedmentioning

confidence: 95%

Ultrasound Monitoring and Microwave Self-healing of Top-Down Cracks in Asphalt Pavements

Franesqui

Yepes

Gallego

2020

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

show abstract

Section: Effect Of Different Steel Additions On the Heating Speedmentioning

confidence: 95%

Ultrasound Monitoring and Microwave Self-healing of Top-Down Cracks in Asphalt Pavements

Franesqui

Yepes

Gallego

2020

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…(a) (b) (c) When the rejuvenator molecules diffuse into asphalt, the movement ability of bituminous molecules is also greatly enhanced at the same time [21]. Through entanglement and collusion of molecular segments, bituminous molecules can make cracks disappear quickly [37]. At a certain temperature, a larger area of rupture interface needs more time for molecular movement.…”

Section: Preliminary Analysis Of a Mathematical Model Of Self-healing Efficiencymentioning

confidence: 99%

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

“…Due to their advantages in heating, such as their fast speed, good uniformity, and energy-saving potential, microwaves are widely used in our daily life, as well as in the food industry, medicine production, and other fields [15]. During the heating process, microwave radiation applies alternating electromagnetic fields with a higher frequency than induction, in the order of megahertz, causing a change in the orientation of polar molecules, which results in internal friction and increases the material temperature [16]. In this way, the bitumen begins to flow, and the damages get healed.…”

Section: Introductionmentioning

confidence: 99%

“…Processes 2021, 9, 507 2 of 11 Norambuena-Contreras et al [8] found that microwave heating increased the temperature of the binder, not the aggregates, and as such normal asphalt mixture can be heated with microwave heating energy. González et al [16] also indicated that asphalt mixtures with aggregates that were naturally heated with microwave radiation could be crack-healed.…”

Section: Introductionmentioning

confidence: 99%

The Prospect of Microwave Heating: Towards a Faster and Deeper Crack Healing in Asphalt Pavement

Liu

Tabaković

et al. 2021

Processes

View full text Add to dashboard Cite

Microwave heating has been shown to be an effective method of heating asphalt concrete and in turn healing the damage. As such, microwave heating holds great potential in rapid (1–3 min) and effective damage healing, resulting in improvement in the service life, safety, and sustainability of asphalt pavement. This study focused on the microwave healing effect on porous asphalt concrete. Steel wool fibres were incorporated into porous asphalt to improve the microwave heating efficiency, and the optimum microwave heating time was determined. Afterwards, the microwave healing efficiency was evaluated using a semi–circular bending and healing programme. The results show that the microwave healing effect is largely determined by the steel fibre content and the mix design of the porous asphalt concrete.. Besides, the uneven heating effect of microwave contributes to an unstable damage recovery in the asphalt mixture, which makes it less efficient than induction heating. However, microwaves exhibited the ability to penetrate further into the depth of the test specimen and heat beneath the surface, indicating deeper damage recovery prospects.

show abstract

Microwave crack healing on conventional and modified asphalt mixtures with different additives: an experimental approach

Cited by 43 publications

References 20 publications

Ultrasound Monitoring and Microwave Self-healing of Top-Down Cracks in Asphalt Pavements

Ultrasound Monitoring and Microwave Self-healing of Top-Down Cracks in Asphalt Pavements

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

The Prospect of Microwave Heating: Towards a Faster and Deeper Crack Healing in Asphalt Pavement

Contact Info

Product

Resources

About