Study on Evolution of the Thermophysical and Mechanical Properties of Inner Shaft Lining Concrete during Construction Period

The asymmetric temperature field is one of the main factors inducing cracking inner shaft lining during freezing-shaft sinking. evolution equation for thermophysical and mechanical properties concrete construction period basis revealing mechanism. In this study, several experiments were conducted to reveal field, thermal conductivity, specific heat capacity, compressive strength, tensile elastic modulus with age thickness within first 7 d after pouring. Results show that curve pouring can be divided into five stages: induction, slow heating, rapid cooling, cooling. Thermal conductivity capacity reached maximum on Day 1 gradually decreased an increase in age. strength significantly increased With thickness, at same improved its three parameters. Finally, these parameters was fitted based experimental data. This study expected provide a studying mechanism lining.