Durability Tests of Silt Reinforced by Tr Materials Under Humid Environment

Abstract

TR material is the abbreviation of glutinous rice and tung oil, which is a traditional organic reinforcement material since ancient China. Taking Qiantang River silt reinforced with TR material as the research object, 9 samples with different mass mix proportions were placed in the standard curing environment (20 °C, humidity 60%) for 7 days, 14 days, 30 days, 90 days and 180 days respectively. Shear test, permeability test and dry-wet cycle test were carried out on the treated samples. The optimum mass ratio of tung oil, glutinous rice juice and soil was determined as 5:10:85. After 180 days, the increased rate of cohesion c and internal friction angle φ is 26.3% and 15.7%, respectively. At the same time, the long-term permeability coefficient of the best mass ratio is the smallest, and the permeability coefficient KT of 180 days is 1.775 × 10−6 cm / s. In the dry-wet cycle test, the best performance is T10R10S80, the strength reduction rate is the least, and the permeability coefficient increased rate is the least. From the perspective of absolute value, the optimum ratio T5R10S85 is still the best after the dry- wet cycle test.