Time Characteristics of High-Speed Fracture of Composite Building Materials at High Temperatures
摘要
Abstract
The dynamic strength of concretes under different temperature-velocity conditions is analyzed using the incubation time criterion and the thermal fluctuation theory of strength. The model is validated through comparison with experimental data on concrete with basalt and limestone aggregate. It is shown that the characteristic relaxation time of concrete increases within the temperature interval of 20 to 800°C and decreases at temperatures above ~800°C.