Experimental Study on High Temperature Mechanics and Thermal Deformation of High Performance Concrete
This article explores the macroscopic characteristics,mechanical properties,and thermal defor-mation of high-performance concrete in high-temperature environments.Using a control experiment method,specimens were made using both plain concrete and high-performance concrete mixed with polypropylene fibers.High temperature tests,mechanical tests after high temperature,and thermal strain tests were conduct-ed using both types of specimens.The results showed that as the temperature of the specimens increased,the plain concrete specimens first appeared cracks and finally completely peeled off,while the high-performance concrete specimens appeared cracks later,with only a small amount of peeling off;The tensile performance and elastic modulus of high-performance concrete are better than those of plain concrete.At high tempera-tures of 800 ℃,the tensile strength loss rate of high-performance concrete specimens is 75.5％,and the e-lastic modulus loss rate is 94.2％,both lower than those of plastic concrete specimens;Under the same heat-ing time,the thermal strain value of high-performance concrete is always lower than that of plain concrete.
万方数据
维普
