关键词: 保水剂, 抗风蚀, 风沙土, 黄土, 粉煤灰

Abstract: The cementation of water-retaining agent can make soil resist wind erosion. We applied different concentrations of water-retaining agents to spray on loess, pulverized fuel ash and aeolian sandy soil, by which we studied the effectof treated soil on resisting wind erosion under various wind velocities in wind tunnel. (1) Under net wind, different concentrations of water-retaining agents all have remarkable effect on resisting wind-erosion; under blown sand flux, the water-retaining agent with high concentration (50 g·m^-3) showed remarkable effect on resisting wind-erosion. (2) When wind velocity was lower than 20 m·s^-1, the effect was always remarkable; when more than 20 m·s^-1 the effect was not ideal, but it strengthened with the concentration of water-retaining agent increasing. (3) If combining with compound sand-fixation material in operation the effect of water-retaining agent on resisting wind erosion would be more remarkable. We suggested the ideal concentrations of water-retaining agent are: 560 g·m^-3 for aeolian sandy soil, 140~280 g·m^-3 for loess and 50~140 g·m^-3 for pulverized fuel ash.

Key words: water-retaining agent, wind erosion resistance, aeolian sandy soil, loess, pulverized fuel ash