摘要：The utilization of new polymeric materials as soil stabilizers has become very popular in soil and water conservation. These materials can solidify the weathered soil and protect it from wind and water erosion. However, the durability under the condition of UV irradiation has limited its application. A hydrophilic polyurethane (W-OH) has been introduced to solidify the Pisha sandstone and protect it from erosion. Additionally, a good result had been obtained by field demonstration. In this study, the aging performances of the consolidation specimens by WOH and functional materials (polyvinyl alcohol, ethylene-vinyl acetate copolymers) and UV stabilizers (UV531 and UV770) were studied under simulated UV irradiation for 32 days and the accelerated rate in UV irradiation simulated test was approximately 7.2 times than that in the Pisha sandstone area. The mass loss and compressive strength were chosen as the indexes to evaluate the aging performances. The results demonstrated that the mass loss of the consolidation body increased with increasing irradiation time and the concentration of W-OH, while the compressive strength first increased and then decreased. The main reason was that the W-OH was degraded by UV irradiation and the structure of the consolidation body changed. The service life was approximately six month in Pisha sandstone area, indicating that the consolidation body was easy to be degraded by UV irradiation. However, when stabilizers were used together with W-OH, the mass loss and the decrease of compressive strength were improved significantly, especially for UV531 and UV770. They could slow down the effect of UV irradiation by absorbing, trapping or acting with UV irradiation. Therefore, the service life could be increased from six month to several years. They would be considered to be used combining with W-OH in Pisha sandstone area.
关键词：Durability;Consolidation body;Mass loss;Compressive strength;Soil and water conservation
