Reinforcing Effect of Bamboo Chips in Bamboo Chip Mixed Solidified Soil

Abstract

While the problem of neglected bamboo forests is becoming more apparent throughout western Japan, there has been no progress in the utilization of bamboo, which is cut down in large quantities for forest conservation and can be consumed. In our previous studies, we have confirmed that the water absorption and tensile reinforcement effect of bamboo chips in bamboo chip mixed solidified soil increases its strength and shows ductile fracture behavior. It has also been confirmed that as the addition rate of bamboo chips increases, the state of bamboo chips in the specimen shifts from dispersed to a skeleton-formed state. However, the relationship between the toughness effect of bamboo chips due to tensile force and the reinforcing effect of their skeleton formation and the addition rate has not been clarified. Therefore, we investigated the reinforcement effect of the bamboo chip skeletal structure and the toughness effect of the bamboo chip tensile force by using uniaxial compression tests and bending tests on the strength development before and after skeletal formation. The results showed that the reinforcement effect of bamboo chip mixed solidified soil increased with the formation of the bamboo chip skeleton, which affected the strength of the soil. It was also shown that the addition of bamboo chips can provide a toughness effect due to the tensile force between the solidified soil and the bamboo chips.