The Macro-Properties of Reinforced Soil by Rice Straw With/Without PVA Treatment

Abstract

This study explores the potential of rice straw. The durability and effectiveness of polyvinyl alcohol (PVA)-treated rice straw in reinforcing silty clay were evaluated by measuring its adhesive absorption, tensile strength, and water absorption. The study found that the compressive strength of the reinforced soil first increased and then decreased with the addition of straw, with an optimal mix of 0.3%. The water stability of the reinforced soil improved significantly, with reduced disintegration rates and extended disintegration times. The germination rate, growth height, and coverage of plants in the reinforced soil also increased significantly. As the curing time increased, the compressive strength of the reinforced soil peaked at 7 days before declining. The soil reinforced with PVA-treated straw showed better compressive strength and water stability than untreated straw. The PVA treatment did not negatively affect plant germination or growth, only slightly affecting early plant promotion. The test results provide a scientific basis for the implementation of more sustainable and environmentally friendly civil engineering practices.