Sandy Fixation Material Based on Liquefied Corn Stover to Decrease Wind Erosion

Abstract:

As sandy fixation materials to protect building residue soil (BRS) from wind erosion，liquefied corn stover (LCS) and polyurethane based on LCS were investigated by a wind tunnel. The results indicated that various particles on the soil surface are connected by LCS or polyurethane to form a protective crust which increases the soil resistance to wind erosion. At a low spraying amount of LCS, with an increase of wind speed, the protective action of LCS to the BRS disappears gradually due to low mechanical strength of LCS crust, and wind erosion ratio widely increases. Compared with LCS, the polyurethane is a more effective sandy fixation material. The threshold wind velocity of BRS is morn than 20m/s at a polyurethane spraying amount of 120.37g/m2; at a same protective action, the amounts of polyurethane used is a half of LCS’s. Moreover, at a high wind speed, the protective action of polyurethane is still good due to a more mechanical strength of polyurethane crust.