The Dynamic Elastic Modulus Evolution of Pervious Concrete under Sulfate Attack

Abstract

Elastic modulus affects the stiffness of pervious concrete, and stiffness is one of the elements restricting the durability of pervious concrete. To explore the deterioration of dynamic elastic modulus of pervious concrete under sulfate attack, this paper measured the variation of pervious concrete’s mass and density with water-cement ratio of 0.28, 0.31, and 0.34 under sulfate attack. A nondestructive ultrasonic tests were also used to determine the change of the ultrasonic wave velocity reflected from pervious concrete. In addtion, the evolution of the dynamic elastic modulus were analyzed. The results show that the pervious concrete manifests an upward curve followed by a downward movement in its density and dynamic elastic modulus as the corrosion lasting. The pervious concrete with a 0.28 water-cement ratio suffers from the worst deterioration, while the concrete with 0.31 ratio experiences the lightest degeneration.