工业废料固化高含水率疏浚淤泥强度特性分析

疏浚淤泥因含水率高而难以直接利用，将其固化成填土材料是一种有效的处理方法．本文通过试验对比分析了3种常见工业废料：粉煤灰、矿渣、磷石膏作为主要固化剂、添加少量生石灰或水泥做反应诱发剂组成的6类复合固化剂固化处理高含水率疏浚淤泥的效果．结果表明：复合固化剂固化疏浚淤泥可以获得较高的无侧限抗压强度；3种工业废料中，磷石膏复合固化剂的固化效果最理想；水泥和工业废料组成的水泥基复合固化剂效果优于石灰基复合固化剂．通过引入强度增长率概念，发现固化淤泥的无侧限抗压强度增长率和复合固化剂中工业废料掺灰比呈线性关系．基于此规律，本文还给出了含工业废料固化高含水率疏浚淤泥早期强度的预测公式．

Analysis on strength characteristics of stabilized high water content dredged sludge with industrial wastes

The stabilization is one of the options used to convert the high water content dredged sludge （DS） into drying filling materials in engineering. The paper presents an experimental study on the characteristics of stabilized high water content DS with three types of industrial wastes as the main stabilizers, including phosphogypsum, fly ash and slag. The experimental results show that the stabilized DS can obtain relative high early unconfined compressive strength. The phosphogypsum as main stabilizer achieves the most desirable effects. The cement-industrial wastes stabilizers are better than the lime-industrial wastes stabilizers. The unconfined compressive strength growth rate is linearly correlated with the percentage of industrial wastes in stabilizers. Finally, a prediction expression of unconfined compressive strength of stabilized high water content DS is given.