Performance evaluation of porous asphalt mixture enhanced with high dosages of cured carbon fiber composite materials

This study used newly-developed fiber-shaped reinforcement elements from cured carbon fiber composite materials (CCFCMs), which were produced from accumulated manufacturing scraps from aerospace manufacturing operation with no current reuse. Previous laboratory and field works have demonstrated a prominent performance for porous asphalt (PA) mixtures enhanced by fiber-shaped CCFCMs at the dosage of 0.05% by weight of the mixture. This study assessed higher dosages (0.15%, 0.30%, and 0.45%) of CCFCMs on the strength and durability of PA mixtures. The results showed that the fiber-shaped CCFCMs helped to stabilize asphalt binder during production and facilitate water infiltration. The addition of high dosages of CCFCMs improved ductility and cracking resistance, but compromised indirect tensile strength. Based on the tested dosages in this and previous studies, the recommended maximum dosage of processed CCFCMs used in PA mixtures is 0.15%. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

This study evaluated the effects of different dosages of fiber-shaped CCFCMs on the performance of PA mixtures. The results showed that suitable dosages can enhance the performance of the mixtures, while high dosages may have negative impacts on the strength of the mixtures.