ABSTRACT
Through indoor experiments, the improvement of mechanical properties of silt flow solidified soil by adding fiber is studied. We prepare the mobile solidified soil with a water–solid ratio of 1.0–1.2, cement content of 8%–14%, and fiber content of 0.2%–0.8% for the fluidity and unconfined compression test. The test results show that: (1) The flowing value of the sludge flowing solidified soil mainly depends on the water–solid ratio and cement content, which increases with the increase of the water–solid ratio and cement content. The addition of basalt fiber can reduce the flow value of solidified sludge, and calcium lignosulfonate as a dispersant can effectively increase the flow value; (2) With the increase of basalt fiber content, the unconfined compressive strength increases, the strain value corresponding to the strength increases, and the crack width decreases when the sample fails, which improves the characteristics of brittle failure. The addition of rice straw fiber increases the strength, but has little effect on the deformation and failure mode; (3) The relationship between the age of unconfined compressive strength and the relationship between the deformation modulus E50 and unconfined compressive strength is established.
