In the contemporary era, 3D printing technology has become widely utilized across diverse fields, including biomedicine, industrial design, manufacturing, food processing, aerospace, and construction engineering. The inherent advantages of automation, precision, and speed associated with 3D printing have progressively led to its incorporation into road engineering. Asphalt, a temperature-responsive material that softens at high temperatures and solidifies as it cools, presents distinctive challenges and opportunities in this context. For the effective implementation of 3D printing technology in road engineering, 3D printed asphalt (3DPA) must exhibit favorable performance and printability. This requires attributes such as good fluidity, extrudability, and buildability. Furthermore, materials utilizing 3DPA for crack repair should possess high viscosity, elasticity, toughness, superior high-temperature stability, and resistance to low-temperature cracking. These characteristics ultimately contribute to enhancing pavement longevity and ensuring worker safety.

• 박대욱(군산대학교 토목공학과 교수·공학박사) | Park, Dae-Wook
• 응웬쯔엉아잉(군산대학교 토목공학과 석사과정) | Nguyen, Truong Anh
• 윤재형(군산대학교 토목공학과 석사과정) | Yoon, Jae Hyeong
• 반민담(군산대학교 BK21 박사후연구원) | Phan, Minh Tam