TY - GEN
T1 - Back-calculation of the moduli of asphalt pavement layer using accelerated pavement testing data
AU - Cheng, Huailei
AU - Wang, Yuhong
AU - Liu, Liping
AU - Sun, Lijun
AU - Hu, Yue
AU - Li, Yi
PY - 2020
Y1 - 2020
N2 - The modulus of asphalt mixture is traditionally measured from the laboratory dynamic modulus test. However, different laboratory test methods often lead to obviously different test results. To evaluate the moduli of asphalt mixtures as constructed in field pavements, this study back-calculated the moduli of the pavement layers, based on measured strain data in Accelerated Pavement Testing (APT). Field tests were conducted to measure strains at different locations of the built pavement section at different temperatures and wheel motion speed. The loading frequencies of the asphalt layer subject to different motion speeds were calculated based on the duration of measured strain pulses. Subsequently, the relationship between the motion speed and the loading frequency was established. An finite element (FE) model of the pavement section was created, which was used to back-calculate the moduli of asphalt pavement layers using the measured strain data. Based on the back-calculation results at different loading conditions, the master curve of the field asphalt layer was determined. This master curve was further used to compare with that obtained from laboratory uniaxial compressive test. The relationship between the field and laboratory moduli was determined to be ELaboratory= 1.298EField.
AB - The modulus of asphalt mixture is traditionally measured from the laboratory dynamic modulus test. However, different laboratory test methods often lead to obviously different test results. To evaluate the moduli of asphalt mixtures as constructed in field pavements, this study back-calculated the moduli of the pavement layers, based on measured strain data in Accelerated Pavement Testing (APT). Field tests were conducted to measure strains at different locations of the built pavement section at different temperatures and wheel motion speed. The loading frequencies of the asphalt layer subject to different motion speeds were calculated based on the duration of measured strain pulses. Subsequently, the relationship between the motion speed and the loading frequency was established. An finite element (FE) model of the pavement section was created, which was used to back-calculate the moduli of asphalt pavement layers using the measured strain data. Based on the back-calculation results at different loading conditions, the master curve of the field asphalt layer was determined. This master curve was further used to compare with that obtained from laboratory uniaxial compressive test. The relationship between the field and laboratory moduli was determined to be ELaboratory= 1.298EField.
KW - Backcalculation
KW - Dynamic modulus
KW - Field and laboratory
KW - Finite element method
KW - Master curve
KW - Strain response
UR - http://www.scopus.com/inward/record.url?scp=85090095849&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-55236-7_39
DO - 10.1007/978-3-030-55236-7_39
M3 - Conference article published in proceeding or book
AN - SCOPUS:85090095849
SN - 9783030552350
T3 - Lecture Notes in Civil Engineering
SP - 379
EP - 388
BT - Accelerated Pavement Testing to Transport Infrastructure Innovation - Proceedings of 6th APT Conference
A2 - Chabot, Armelle
A2 - Hornych, Pierre
A2 - Harvey, John
A2 - Loria-Salazar, Luis Guillermo
PB - Springer
T2 - 6th International Conference on Accelerated Pavement Testing, APT 2021
Y2 - 27 September 2021 through 29 September 2021
ER -