Investigation into the Mechanical Properties of Self-Leveling Epoxy Asphalt Concrete as a Future Assembly-Oriented Bridge Deck Pavement Material

To facilitate the future assembly-oriented development of bridge deck asphalt pavement (BDAP), self-leveling epoxy asphalt concrete (SLEA) is developed as a specialized compaction-free prefabricated material, and its mechanical properties were further investigated. The dynamic modulus test of SLEA mortar and the uniaxial penetration test of SLEA mixture were carried out to explore the mortar viscoelasticity and high-temperature shear performance, respectively. Results show that the designed SLEAs have good fluidity and strength, which can meet the demand for compaction-free pavement materials and prove the feasibility of SLEA used in future prefabricated pavement. The viscoelastic properties of epoxy asphalt mortar cause a certain mechanical hysteresis. The strengths of SLEA mixture and mortar are both largely affected by the curing of epoxy asphalt. However, the adoption of coarse-graded aggregate type while ensuring the fluidity is beneficial to improving the high-temperature shear performance of SLEA. The findings could guide the design of SLEA and promote the application of future assembly-oriented BDAP. © 2025 American Society of Civil Engineers.