Assessment of the Operational Safety of Roads and Transport Structures with Use of the Fracture Mechanics Methods

The study is aimed at revealing the correlation between the critical coefficient of stress intensity and slag alkaline cement-free concrete structure and strength. Based on the fracture mechanics methods, the comparative assessment of crack formation in concrete of transport structures based on traditional and cement-free slag alkaline binder is performed. The comparison of criteria of crack resistance of high strength slag alkaline concrete and portland-cement concrete has shown that the first one has the stress intensity coefficient 1.5 times higher, fracture energy value 2.4 times higher, a bigger crack size at the same level of loading. Thus, it is concluded that slag alkaline concrete is a perspective and durable material for road and transport structures.