Micromechanics-Based Viscoelasticity Predictions of Crumb Rubber Modified Bitumen Considering Polymer Network Effects

Crumb rubber modified bitumen (CRMB) can be regarded as a binary composite system in which swollen particles are embedded the matrix. Previous study has successfully implemented micromechanics models predicting complex moduli of CRMB binders using more representative constituent parameters. In regime master curves, while used predicted well high-frequency range, they underestimated modulus low-frequency range. The current aims to further improve prediction accuracy for by considering interparticle interactions. To accomplish this goal, new reinforcement mechanism called chain entanglement effect was introduced account interaction effect. Results show that polymer accounts underestimation and lack elasticity (overestimation phase angle) at high temperatures/low frequencies. mechanical properties matrix entangled network determined based on content. introduction generalized self-consistent model significantly improved both angle whole frequency summary, incorporating physio-chemical into currently available models, dedicated been developed. viscoelastic behaviors thereafter inputs an mix design.