Pavement performance of ‘two asphalt one aggregate’ waterproof

摘要

The damage of waterproof is a main reason that causes the bridge pavement diseases. Controlling the quality of cementing material is an effective measure to improve the endurance of bridge pavement. ‘Two asphalt one aggregate’ is put forward to solve the problem of ‘white aggregate’ appeared on the shearing destruction interface of synchronous crushed stone, The asphalt optimum dosage of ‘two asphalt one aggregate’ is recommended applying the shear test and pullout test in laboratory. Pavement performance of ‘two asphalt one aggregate’ is studied, and its applicability is studied too. The results show that the shear strength and tensile strength of ‘two asphalt one aggregate’ are improved 12% and 52% respectively than that of synchronous crushed stone when the asphalt dosage of it adopts the recommended optimum dosage. While the corresponding asphalt dosage increases 7.1% only, which shows ‘two asphalt one aggregate’ has good bond behavior.