This study investigates the rheological and compression behavior of cement-solidified dredged slurry with varying rice straw fiber contents (0-12%). Laboratory tests, including flow tests, viscosity measurements, and compression tests, were conducted to evaluate the influence of straw fibers on material properties. Results show that the slump flow value increased by 8.4% when fiber content increased from 0% to 0.5%, reaching a peak at 3% fiber content. Beyond 5% fiber content, slump flow decreased due to fiber entanglement and water absorption. The dynamic viscosity initially decreased as straw fibers released glucose, retarding cement hydration, but increased as fiber content surpassed 1%, due to increased water absorption and the formation of a fiber network. Yield shear stress also increased with fiber content, peaking at 5% fiber content, and was higher in fiber-reinforced slurries compared to non-fiber mixtures. Compression tests revealed that the compressibility of the solidified slurry increased with higher fiber content at early curing stages (28 days) but decreased with longer curing times (90-180 days). Compression yield stress increased initially with fiber content up to 1% but declined beyond this threshold due to fiber-induced porosity and disrupted cement bonding.

来源平台：MARINE GEORESOURCES & GEOTECHNOLOGY