Application of Non-Destructive Technology in Evaluating Concrete to Sulfate Attack

摘要: The deterioration on sulfate attack was investigated both in physical crystallization and the chemical erosion. Specimens that suffered long-term immersion dry-wet cycles saturated sodium solution are compared to trace attack. And erosion conducted by comparing specimens which have been limestone solution. In investigation, non-destructive detecting indexes, such as ultrasonic velocity, dynamic modulus of elasticity were measured. permeability, porosity mechanical strength at 28-day age flexural/compressive measured after 90 wet-dry cycles. then all cut into cubes take measure compressive strength. Based experiments, feasibility various parameters, relative elasticity, velocity strength, evaluate concrete deterioration. results indicate there is a close relationship between so reduction permeability effective promoting resistance. index resistance expressed ratio comparable flexural A novel method suggested evaluating attack, namely, combined with some tests, parameter can be used deterioration; denoted amount transporting charges within 6 hours properties