Dilatation of the method of fixation moveable sands

Abstract

A new method of physicochemical blocking deflation of movable sands has been developed, representing their fixing in a wet state with binders. It is proposed to carry out sand-fixing works during rainy periods of the year or after preliminary moistening of the sandy surface to intensify and reduce the cost of sand-fixing works. The substantiation is carried out on the example of some of the approved and recommended binders based on the express method of studying the possibility of their application to obtain a polymer sandy protective crust on the wet sand. The resulting protective crust is characterized by resistance to wind-sand flow, assessed by plastic strength and thickness. Impregnation of wet sand with a smaller amount of binder than dry sand is associated with a change in the nature of impregnation from gravity to capillary. With a decrease in the specific surface of the bulk material and an increase in the pore space, gravitational forces are predominant. The process of wet sand impregnation is associated with the acceleration of the adsorption of the dispersed phase and a decrease in the pore space due to the partial occupation of the interpore space with water. As a result, in wet sand, the depth of impregnation of the sand with the binder increases with lower consumption per unit volume of sand. It has been established: the possibility of impregnation of approved and recommended binders into the wet sand, the inverse dependence of the concentration of the binder used in the form of emulsions on the moisture content of the sandy surface; time of application of various binders after sand moistening; saving binders.