Abstract: The paper presents the use of the rice husk ash and the cement to improve the mucky soft soils. The compactive properties, the unconfined compressive strength, the consolidation properties and the micromorphology of the rice husk ash and the cement treated soft soil samples under different curing ages were systematically studied. The results show that, compared with the untreated mucky soft soil samples, the optimal moisture content of the rice husk ash and the cement treated soil samples increases and the maximum dry density decreases. The strength of the treated soil samples is much greater than that of the untreated samples and the treated soil samples have good curing effect and good compression performance. When cured for 28 days, the cementing system of the rice husk ash-cement treated soil samples is mature, and the soil sample is cemented by the hydrated calcium silicate gel. The soil compactive behavior is improved, and the strength of the rice husk ash soil-cement treated soil samples is also improved.

Key words: Rice Husk Ash, Cement, Unconfined Compressive Strength, Consolidation Test, Micro Morphology