Analysis of the damage to the aeolian sand concrete surfaces caused by wind-sand erosion

Abstract

The study simulated the Aeolian sand concrete damage process under wind-sand erosion using a sand-bearing wind-sand erosion test device. Then, different wind parameters were selected to study their damage failure influences on Aeolian sand concrete surfaces, and an orthogonal test was carried out for three factors: wind speed, sand carrying capacity, and angle of attack. The significant level and variance contribution rate of the angles of attack were the largest. The test results indicated that the damage failure arising from wind-sand erosion could be divided into three stages: the accelerated development stage, attenuation stage, and stabilization stage. During the accelerated development stage, the damage failure of the concrete surfaces was found to be relatively large, and obvious erosion pits were produced following the erosion. With the increases in action times, the process gradually developed into the attenuation stage, and then finally into the stability stage. The test results revealed that the damage failure of the Aeolian sand concrete surfaces which arose from the sand flow with 200 to 300 μm diameter sand was relatively serious.