A study on the relationship between freeze-thaw cycles and reduction in quality loss of permeable concrete
The frost resistance of permeable concrete is an important strength and durability indicator in cold regions.Based on the freeze-thaw tests conducted on permeable concrete specimens,this study reveals that small cracks within the permeable concrete con-tinuously propagate in a certain direction.When they reach a certain extent,initially isolated pores become interconnected.The relative change in elastic modulus is measured to evaluate the damage status of permeable concrete.It is observed that the mass loss of the spec-imens is only 0.74％after 70 freeze-thaw cycles,with no significant surface damage.However,the evaluation of the concrete's damage state using the dynamic modulus tester primarily relies on the internal fundamental frequency attenuation,thus the relationship be-tween permeable concrete and elastic modulus requires further investigation.
permeable concretefreeze-thaw testrelative elastic modulusquality loss
NETL
NSTL
万方数据
