Application of X-ray tomography to assess fatigue structural changes in asphalt mixtures

• Autorzy: Mackiewicz Piotr , Szydło A.

Identyfikatory

DOI

10.24425/bpas.2019.128604

• Języki publikacji: EN

Abstrakty

EN

The article presents an analysis of the change in air voids in asphalt mixtures subjected to fatigue tests at three temperatures of 0°C, 10°C and 25°C. The X-ray computerized tomography imaging method, XCT, was used to identify the air voids in the samples. The research allowed to determine changes in the content of air voids in subsequent fatigue cycles in the sample area. The relationship between air voids volume and the stiffness modulus value was also determined during fatigue for three temperatures. The largest changes were found in samples with notches at 0°C. The analysis of the change in the content of air voids showed that the micro-cracking nucleation processes develop with the number of fatigue cycles. Using the numerical model finite element method we determined the distribution and change in fatigue damage in the extreme areas of the sample during various stages of fatigue. We found clear relationship between the damage and the increased content of air voids.

Słowa kluczowe

EN

fatigue; air voids; fatigue damage; notch; X-ray

PL

zmęczenie; uszkodzenie zmęczeniowe; karb; RTG

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2019
• Tom: Vol. 67, nr 2
• Strony: 307--315
• Opis fizyczny: Bibliogr. 31 poz., rys., wykr.

Twórcy

autor

Mackiewicz Piotr

• Faculty of Civil Engineering, Wrocław University of Science and Technology, 27 Wybrzeże Wyspiańskiego St., 50-370 Wrocław, Poland

autor

Szydło A.

• Faculty of Civil Engineering, Wrocław University of Science and Technology, 27 Wybrzeże Wyspiańskiego St., 50-370 Wrocław, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).