Mechanical experiment evaluation of the microvascular self-healing capability of bitumen using hollow fibers containing oily rejuvenator

Self-healing products such as hollow fibers filled with a recycling agent present an emerging technology that would enhance an asphalt mixture’s resistance to cracking damage in the long term. The objective of this study was to evaluate the healing efficiency of sodium-alginate fibers containing a recycling agent using asphalt concrete beam specimens. A self-healing experiment was designed and conducted to monitor strength recovery in the damaged specimens using a 3-point bending test during a 6-day healing period under two different environmental curing conditions. In addition, the effects of adding the hollow fibers on the mechanical properties of asphalt mixtures were evaluated by conducting a series of laboratory tests to evaluate the performance against common distress such as permanent deformation, intermediate cracking, and low-temperature cracking. Results of the self-healing experiment test results showed that the addition of sodium-alginate fibers improved the strength recovery of mixtures prepared with unmodified binder. The increase in temperature from 25°C to 50°C during the healing period also resulted in higher strength recovery percentages in all the evaluated mixtures. Furthermore, semi-circular bending test results showed that the addition of fibers enhanced the mechanical properties against fracture at intermediate temperature of mixtures containing recycled asphalt materials.

Download Full-text

Performance Characteristics of Asphalt Binders containing Sodium-Alginate Hollow Fibers and Recycled Materials

MATEC Web of Conferences ◽

10.1051/matecconf/201927103004 ◽

2019 ◽

Vol 271 ◽

pp. 03004 ◽

Cited By ~ 1

Author(s):

Max A. Aguirre ◽

Marwa M. Hassan ◽

Sharareh Shirzad ◽

Louay N. Mohammad ◽

Samuel B. Cooper ◽

...

Keyword(s):

Sodium Alginate ◽

Asphalt Binder ◽

Emerging Technology ◽

Hollow Fibers ◽

Asphalt Binders ◽

Self Healing ◽

Test Results ◽

Polymeric Fibers ◽

Recycled Materials ◽

Alginate Fibers

Self-healing products such as hollow-fibers filled with an asphalt rejuvenator present an emerging technology that would enhance an asphalt mixture’s resistance to cracking damage. The objective of this study was to evaluate the rejuvenating efficiency of sodium-alginate fibers containing a rejuvenator product using asphalt binder blends containing extracted binder from recycled materials. The effects of adding extracted binder from recycled materials and sodium-alginate fibers on asphalt binder blends were evaluated by conducting a series of chemical and binder tests. HP-GPC and FTIR test results showed that the addition of fibers in blends containing recycled materials resulted in an increase in the HMW/LMW ratios. Some of the added polymeric fibers are thought to have increased the HMW fraction, thus leading to increase in the HMW/LMW ratio. The increase of the HMW fraction suggests that some of the fibers, which are polymers, caused the increase in the HMW/LMW ratios. MSCR test results showed that a binder blend with extracted binder from recycled materials and sodium-alginate fibers would have less rutting susceptibility than a conventional virgin binder would.

Download Full-text

Novel vascular self-nourishing and self-healing hollow fibers containing oily rejuvenator for bitumen

Construction and Building Materials ◽

10.1016/j.conbuildmat.2018.06.181 ◽

2018 ◽

Vol 183 ◽

pp. 150-162 ◽

Cited By ~ 10

Author(s):

Xiao-Long Zhang ◽

Jun-Feng Su ◽

Yan-Dong Guo ◽

Xin-Yu Wang ◽

Yuan Fang ◽

...

Keyword(s):

Hollow Fibers ◽

Self Healing

Download Full-text

Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

Polymer Chemistry ◽

10.1039/d0py01034k ◽

2020 ◽

Vol 11 (41) ◽

pp. 6549-6558

Author(s):

Yohei Miwa ◽

Mayu Yamada ◽

Yu Shinke ◽

Shoichi Kutsumizu

Keyword(s):

Mechanical Properties ◽

Room Temperature ◽

Self Healing ◽

High Modulus ◽

Disordered Crystals ◽

Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

Download Full-text