The strength criteria is the acceptable strength for allowable a vehicle start on a concrete pavement at an early age without causing significant damage. The different agencies have provided the strength criteria based on empirical judgement. To make more comprehensive, the ACI specification provided strength criteria by consideration traffic conditions, slab thicknesses, and slab support based on the concept of damage. However, its neglected to consider the damage caused by curling stress due to temperature gradient in concrete pavement. This research aims to provide a strength criteria for opening traffic on concrete pavements while taking into account the damage caused by curling stress and traffic loading. The tensile stress at critical locations was determine due to curling and traffic loads every hour of early age throughout different seasons. The fatigue damage taken throughout early age was assessed. After this procedure, the strength criteria was established as the evaluated damage that did not exceed an acceptable limit. Accordingly, the strength criteria for opening traffic was determined to ensure that the specified damage level existed subject to the construction season, construction period, traffic type, slab thickness, and slab support of concrete pavement.

1. Research purpose and content
2. Conclusion
Acknowledgments

• Duongdarashy Chheun(강릉원주대학교 토목공학과 석사과정)
• 김영규(강릉원주대학교 방재연구소 연구교수·공학박사) | Kim, Young Kyu
• 이승우(강릉원주대학교 토목공학과 교수·공학박사) | Lee, Seung Woo