The role of rejuvenators in embedded damage healing for asphalt pavement

S. Xu; X. Liu; A. Tabaković; P. Lin; Y. Zhang; S. Nahar; B.J. Lommerts; E. Schlangen

Materials & Design (Apr 2021)

The role of rejuvenators in embedded damage healing for asphalt pavement

S. Xu,
X. Liu,
A. Tabaković,
P. Lin,
Y. Zhang,
S. Nahar,
B.J. Lommerts,
E. Schlangen

Affiliations

S. Xu: Civil Engineering and Geosciences, Delft University of Technology, Delft 2628CN, the Netherlands; Corresponding author.
X. Liu: Civil Engineering and Geosciences, Delft University of Technology, Delft 2628CN, the Netherlands
A. Tabaković: Civil Engineering and Geosciences, Delft University of Technology, Delft 2628CN, the Netherlands; Centre for Research in Engineering Surface Technology (CREST), Technological University Dublin, D08 CKP1, Ireland; School of Civil Engineering, University College Dublin, Dublin D04 K3H4, Ireland
P. Lin: Civil Engineering and Geosciences, Delft University of Technology, Delft 2628CN, the Netherlands; Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China
Y. Zhang: Civil Engineering and Geosciences, Delft University of Technology, Delft 2628CN, the Netherlands; School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
S. Nahar: Latexfalt B.V., Koudekerk aan den Rijn 2396 AP, the Netherlands; TNO Science and Industry, Delft 2628 CK, the Netherlands
B.J. Lommerts: Latexfalt B.V., Koudekerk aan den Rijn 2396 AP, the Netherlands; Xiyuefa Group, Taiyuan 030006, Shanxi, China
E. Schlangen: Civil Engineering and Geosciences, Delft University of Technology, Delft 2628CN, the Netherlands

Journal volume & issue: Vol. 202
p. 109564

Abstract

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Rejuvenator encapsulation technique showed great potential for extrinsic asphalt pavement damage healing. Once the capsules are embedded within asphalt pavement, the healing is activated on-demand via progressing microcrack. When the microcrack encounters the capsule, the fracture energy at the tip opens the capsule and releases the rejuvenator. Then the released rejuvenator wets the crack surfaces, diffuses into and softens the aged bitumen, allowing two broken edges to come in the contact, preventing further asphalt pavement deterioration. The quality and speed of the damage repair process strongly depend on the quality of rejuvenator, thus it is important to choose a proper rejuvenator with good abilities to restore the lost properties of bitumen from ageing and show a sustainable performance after healing. To this aim, three different rejuvenators were studied and ranked based on the performance of their rejuvenated bitumen, including physical properties, rheological properties, chemical properties and the performance after re-ageing. Furthermore, these rejuvenators were encapsulated in calcium alginate capsules and the tests on these capsules indicate the diameter, mechanical resistance and thermal stability of the capsules are influenced by the encapsulated rejuvenator. The findings will benefit the development of rejuvenator encapsulation technique and the optimization of the capsule healing system towards a better healing effect in asphalt pavement.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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