Characteristic of Airport Pavement Concrete with Low Flexural Tensile Modulus

Airport pavement concrete with high flexural tensile strength usually have the relatively high flexural tensile modulus, the influence of the pavement load stress and temperature stress induced by improve of flexural tensile modulus is discussed according to existing specification. It is pointed that under the unchangeable load, the load stress and temperature stress will increase greatly with the increase of the flexural tensile modulus, which results in the fracture of pavement slab. Thereby the modulus should be controlled with the increase of the strength. Then based on the contrastive experiments on flexural tensile strength and flexural tensile modulus of three kinds of airport pavement concrete (plain concrete, steel fiber reinforced concrete, steel fiber latex reinforced concrete), the method to reduce the flexural tensile modulus is studied. The result indicates that the modulus, the load stress and the temperature stress will depress of more than 20 percent respectively by adopting the steel fiber latex concrete, so as to decrease the stress of pavement slab.