Abstract: A modification method of temperature-induced curling impact based on pavement deflection is proposed in order to
reduce the impact of temperature-induced curling on deflection test of airport cement concrete pavement and im－
prove the accuracy of structural performance evaluation of pavement. Firstly, the effective deflection of the pave－
ment under negative temperature gradient is derived as the difference between the field-measured deflection and
the corresponding temperature-induced curling. Secondly, based on numerical simulation and regression calcula－
tion, it is analyzed that the temperature-induced curling at the edge as well as corner of the pavement panel are lin－
early positively correlated with the thickness of the pavement panel and the flexural and tensile elastic modulus of
the cement concrete, and are only slightly influenced by the low-level subgrade reaction modulus and joint load
transfer capacity. Accordingly, a calculation formula for pavement temperature-induced curling is established with
the thickness of the pavement panel and the flexural and tensile elastic modulus of the cement concrete as correc－
tion parameters. Finally, the modification method proposed in this article is verified through field testing. The re－
sults show that the correction error of deflection is less than 10.0% at edge and less than 6.0% at corner of the pave－
ment panel based on the standard of pavement deflection under zero temperature gradient. The proposed modifica－
tion method of temperature-induced curling impact based on pavement deflection can satisfy the requirement for
general structural performance evaluation of airport pavement.

Key words: airport engineering, cement concrete pavement, temperature-induced curling, deflection