Determination of the fatigue equation for the cement-stabilized cold recycled mixtures with road construction waste materials based on data-driven

Abstract

The fatigue life is one of the essential design indexes of the cement-stabilized cold recycled mixtures (CSCRM) in China. However, it is challenging to determine the fatigue equation of the CSCRM. In this study, the symbolic regression method is adopted to automatically identify a closed-form equation by the data-driven model to establish the fatigue prediction equation with a unified and concise mathematical structure. The developed method was illustrated and compared with the test results. The results show that the developed equation has a satisfactory prediction effect and provides a good and helpful tool to determine the fatigue life for CSCRMs.