TY - CHAP
T1 - Mechanistic Temperature–Frequency Correction of Deflectometer-Based Moduli for Cement-Bitumen Treated Materials
AU - Bastos, Juceline
AU - Torquato e Silva, Samuel
AU - Bérubé, Marc André
AU - Lachance-Tremblay, Éric
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2026.
PY - 2026
Y1 - 2026
N2 - The mechanical behaviour of Cement–Bitumen Treated Materials (CBTM) depends on temperature, loading frequency, and curing time, requiring temperature correction for reliable modulus interpretation. Existing approaches often oversimplify these effects, limiting their use for CBTM. This study proposes a mechanistic correction model for elastic moduli from deflectometer testing, applied in a rehabilitation project in Trois-Rivières (Québec, Canada) with a 200 mm CBTM layer produced by in-place stabilization. Light Weight Deflectometer (LWD) tests at different curing ages were backcalculated with BackCAP and validated by Indirect Tensile Stiffness Modulus (ITSM) tests. The model incorporates the dominant LWD loading frequency (≈35 Hz) from Fourier analysis and master curve parameters from dynamic modulus tests. Results show stable correction factors within ΔT −10 °C to 20 °C and agreement between backcalculated and ITSM moduli. The model outperforms Godenzoni’s formula but requires further validation with field and laboratory data from other roads to confirm its broader applicability.
AB - The mechanical behaviour of Cement–Bitumen Treated Materials (CBTM) depends on temperature, loading frequency, and curing time, requiring temperature correction for reliable modulus interpretation. Existing approaches often oversimplify these effects, limiting their use for CBTM. This study proposes a mechanistic correction model for elastic moduli from deflectometer testing, applied in a rehabilitation project in Trois-Rivières (Québec, Canada) with a 200 mm CBTM layer produced by in-place stabilization. Light Weight Deflectometer (LWD) tests at different curing ages were backcalculated with BackCAP and validated by Indirect Tensile Stiffness Modulus (ITSM) tests. The model incorporates the dominant LWD loading frequency (≈35 Hz) from Fourier analysis and master curve parameters from dynamic modulus tests. Results show stable correction factors within ΔT −10 °C to 20 °C and agreement between backcalculated and ITSM moduli. The model outperforms Godenzoni’s formula but requires further validation with field and laboratory data from other roads to confirm its broader applicability.
KW - Backcalculation
KW - Cement–Bitumen Treated Materials (CBTM)
KW - Light Weight Deflectometer (LWD)
KW - Temperature–frequency correction
UR - https://www.scopus.com/pages/publications/105049134689
U2 - 10.1007/978-3-032-30655-5_2
DO - 10.1007/978-3-032-30655-5_2
M3 - Book Chapter
AN - SCOPUS:105049134689
T3 - RILEM Bookseries
SP - 9
EP - 15
BT - Proceedings of the 2nd RILEM International Symposium on Bituminous Materials (ISBM 2026)
PB - Springer Science and Business Media B.V.
ER -