This report summarizes of Crack Sealing Machine a comprehensive experimental and modeling investigation on the contraction and expansion of asphalt mixtures due to thermal cycles. As part of this study, a model of Crack Sealing Machine was developed for thermal stress analysis during cooling/heating cycles using different cooling rates and isothermal conditioning periods.
The model accounts for the asphalt mixture glass transition and physical hardening, and it can be used to investigate which thermo volumetric parameters significantly affect the asphalt mixture response during cooling and heating cycles of Crack Sealing Machine.
Using the model predictions it is shown that thermal stress relaxation and stress build-up induced by physical hardening can continuously affect thermal stress relaxation and stress build-up induced by physical hardening can continuously affect thermal stress throughout the cooling process.
Cooling rate also affected the amount of delayed stress build up occurring after the temperature has stabilized at isothermal condition due to physical hardening
