Every year, a large amount of silt is generated by river dredging. For the characteristics\nof dredging silt, such as high moisture content, low strength and\nhigh compressibility, the traditional solidification method can no longer better\nsolve this kind of silt problem. This paper mainly studies the fluidized solidification\ntreatment of high water content sludge, not only makes the silt\nsoil achieve a good solidification effect, but also the project cost is lower, the\nconstruction method is more environmentally friendly and green. The influencing\nfactors of the solidified soil are mainly investigated by the unconfined\ncompression test and the fluidity test. The experiment result shows 1)\nWhen the cement to sludge mass ratio (RCS) is 0.09 - 0.16 and the fly ash to\ncement mass ratio (RFC) is 0.35 - 0.80, as the amount of RFC increases, the flow\nrate of the solidified soil gradually decreases. With the increase of time, the\nliquidity is significantly reduced, and the influence of cement on the fluidity\nis greater than that of fly ash. 2) When RCS = 0.09 - 0.16, the strength of the\nsludge solidified soil at 28 d age increased by 4.5 - 6 times. 3) When RCS = 0.09\n- 0.16 and RFC = 35% - 80%, the intensity of 14 d increased by 1.23 times than\nthat of 7 d, and the intensity of 28 days increased by 1.29 times than that of 14\nd. This experiment can provide the mix ratio design of solidified materials for\ndifferent needs of the project, which can better provide a basis for engineering\napplication and strength prediction.
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