Heavy Rainfall-induced Slope Erosion Prevention by Recycled Rubber Textile
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Abstract
Soil erosion is a significant problem for ecosystems and management costs. The main factor affecting the amount of soil eroded is rainfall intensity. This study investigated waste materials from the mining industry as alternatives to geosynthetic materials in soil applications. The rubber that had been used, which is otherwise valueless and costly to handle for disposal, was selected as a geosynthetic material for erosion prevention under very heavy rainfall conditions, with a rainfall intensity of 120 mm/hr. The study conducted a tilted bed slope experiment to compare eight different conditions, including slope angle, soil density, and the use of rubber. The results showed that the use of rubber can effectively protect soil erosion, by up to 60%, compared to conditions without rubber under very heavy rainfall. It was found that the slope angle influences the amount of soil eroded; as the slope angle increases, the soil erosion also increases. Notably, at a slope of 45°, the effectiveness of rubber exhibited a similar result in preventing erosion as without rubber. It is worth noting that increasing soil density leads to a decrease in soil erosion. This is more clearly demonstrated in terms of combined rubber, resulting in up to a 35% reduction in soil erosion. Future studies on recycling rubber could focus on waste dumping areas, earthworks and mine pit walls.
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