The microlayer model: using numerical analyses to uncover the potential of a continuously carbon-reinforced concrete pavement

Abstract

Continuously reinforced concrete pavements (CRCPs) are non-standard in road construction but reduce maintenance needs by eliminating joints and controlling cracking through continuous longitudinal reinforcement. However, conventional steel reinforcements are prone to stress corrosion cracking in chloride-rich environments. This study explores the mechanical feasibility of replacing steel by mineral-impregnated carbon fiber reinforcement (MCF). Due to limited large-scale experimental data, Finite Element Method (FEM) simulations are utilized, employing the microlayer framework for efficient MCF modeling. Numerical comparisons are carried out between the mechanical characteristics of MCF-reinforced pavement and a standard German road design. The parameters of the material model are determined through four-point bending tests conducted on laboratory specimens. A tire stiffness test rig is used to simulate a more realistic tire-road interaction through accurate tire contact patch determination.