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Indices-Based Healing Quantification for Bituminous Materials
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.ORCID iD: 0000-0002-9013-1340
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.ORCID iD: 0000-0001-7333-1140
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.ORCID iD: 0000-0003-3968-6778
2021 (English)In: Journal of materials in civil engineering, ISSN 0899-1561, E-ISSN 1943-5533, Vol. 33, no 11, article id 04021294Article in journal (Refereed) Published
Abstract [en]

In the present study, three-point bending tests are carried out using single-edge notched beam specimens of bitumen and mastic to quantify healing. Experiments are conducted at a controlled displacement rate of 1 mm per minute at -15 degrees C. After the crack propagation, samples are given a rest period of 2 h at 10 degrees C to promote healing before retesting them. Two different analysis approaches appealing to linear elastic fracture mechanics and viscoelastic fracture mechanics are compared. In order to perform analysis based on viscoelastic fracture mechanics, the elastic-viscoelastic correspondence principle is used. The amount of healing after the rest period is quantified using various healing indices based on the recovery of stiffness, peak load, fracture toughness, fracture energy, and J-integral. From the analysis performed on bitumen and mastic samples, the study illustrates that the quantum of healing is different when comparing different healing indices. While the stiffness-based healing index demonstrated the healing ability of bitumen, other healing indices used in the study confirmed the higher healing potential of mastic. The healing based on critical value of J-integral shows a distinct difference in the healing of bitumen and mastic. The study emphasizes that the quantification of healing capacity when using different healing indices should be closely linked to its measured conditions.

Place, publisher, year, edition, pages
American Society of Civil Engineers (ASCE) , 2021. Vol. 33, no 11, article id 04021294
Keywords [en]
Healing, Fracture mechanics, Three-point bending, Healing indices, Energy dissipation, Stiffness, J-integral, Bitumen, Mastic
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-303036DOI: 10.1061/(ASCE)MT.1943-5533.0003924ISI: 000696610300037Scopus ID: 2-s2.0-85113334200OAI: oai:DiVA.org:kth-303036DiVA, id: diva2:1643214
Note

QC 20220309

Available from: 2022-03-09 Created: 2022-03-09 Last updated: 2022-06-25Bibliographically approved

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Varma, RemyaBalieu, RomainKringos, Nicole

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