Abstract: Textile companies produce a large number of synthetic waste fabrics every year, and improper handling can cause serious environmental pollutions. The discarded fiber yarn is used to form a fiber yarn-reinforced loess sample by loosening, combing, and cutting into the plain loess at a certain ratio. Related tests were carried out on plain loess, monofilament fibre-reinforced loess and fiber yarn-reinforced loess samples by using pavement material strength tester, true triaxial apparatus, tensile strength tester and soil erosion equipment, respectively. The results showed that when the fiber yarn blending ratio increases, the unconfined compressive strength increases first and then decreases, which indicates the optimal fiber doping ratio is found. For the unconfined compressive strength, fiber yarn-reinforced loess and monofilament fibre-reinforced loess are larger than plain loess. Under the same fiber blending ratio, fineness and length, the unconfined compressive strength of fiber yarn-reinforced loess is more significant than that of monofilament fiber-reinforced loess. The cohesive strength of fiber yarn-reinforced loess is greater than those of monofilament fibre-reinforced loess and plain loess; while the internal friction angle of these three loesses is similar. Plain loess exhibits brittle failure characteristics in the tensile strength test. Tensile strength of fiber yarn-reinforced loess is higher than those of monofilament fiber-reinforced loess and plain loess. Tensile strain of fiber yarn-reinforced loess is larger than that of monofilament fiber-reinforced loess. At the same time point, the pores formed by the fiber yarn-reinforced loess are smaller than the plain loess, and the amount of erosion is less than that of plain loess.

Key words: loess, chemical waste cloth, fiber yarn, reinforcement, experimental research