Technique research on flexibility and toughness modification for epoxy asphalt concrete

To solve the problem of hardness and brittleness after the hardening of epoxy asphalt concrete in steel deck pavement, its poor coordination with the bridge deck, and its proneness to crack, a means was introduced to improve the flexibility and toughness of epoxy asphalt concrete by adding rubber particles and polyester fiber. The low-temperature bending test and bending fatigue test were carried out to analyze the influence of rubber particles and polyester fiber on bending failure strain and fatigue life of epoxy asphalt concrete. The results show that the flexibility and toughness of epoxy asphalt concrete can be improved after adding rubber particles and polyester fiber. The flexible performance of the mixture is improved through the crazing effect caused by adding rubber particles, and the optimum dosage of rubber particle is 2.1%. While polyester fiber greatly improves the toughness properties of the mixture through the combined action of structure-asphalt and fiber net developing in the blends, and the optimum dosage of polyester fiber is 0.3%. ©, 2015, Editorial Department of Journal of Chang'an University (Natural Science Edition). All right reserved.