Experimental Study on Energy Dissipation and Microstructure of Rubber Concrete under Freeze-thaw Cycle
ZHANG Lingling
Abstract：To explore the variation of damage degree and energy dissipation of plain concrete and rubber concrete under freeze-thaw action,the physical mechanical properties and microstructure of the specimens were obtained through acoustic wave detection,static uniaxial compression test and scanning electron microscopy(SEM).The damage degree,peak stress,energy dissipation pattern and internal microstructure of specimens were analyzed under different numbers of freeze-thaw cycles(0,30,60,90,120,150).Findings reveal that the longitudinal wave velocity of the specimens is decreased by freeze-thaw cycles.Specifically,the damage degree of the specimens becomes more pronounced as the number of cycles increases.The freeze-thaw action reduces the specimens ability to resist external loads.The peak stress of the specimens exhibits a negative quadratic function correlation with the number of freeze-thaw cycles,while the stress reduction of rubber concrete is significantly smaller than that of plain concrete.The incorporation of rubber significantly enhances the ductility and energy absorption effect of concrete specimens,reduces the crack propagation degree of specimens under freeze-thaw cycles,and remarkably improves the frost resistance of concrete materials.
Keywords：freeze thaw cyclerubber concretedamage degreepeak stressenergy dissipationscanning electron microscope
Publication Date：2025-03-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 106-112 )