中文摘要：

为了综合利用黄河淤积泥沙，分析了泥沙粒度、矿物和化学组成、重金属溶出浓度。通过对黄河下游泥沙进行水热固化，初步探讨了添加物对固化样品强度的影响以及其硬化机理。结果表明，黄河上、中、下游以及表层和下层（1m）泥沙的粒度细且均一、组分亦无大的变化，泥沙重金属的溶出浓度满足国家土壤环境标准。水热固化样品抗弯强度可达17MPa，固化体强度增加的主要原因是托勃莫来石晶相的生成。

英文摘要：

In order to utilize the Yellow River sediments, silt is characterized by instruments for silt properties. The silt in the lower reaches of the Yellow River is also solidified using a hydrothermal processing method, and investigated the effect of addition content on flexural strength of solidified bodies and its hardening mechanism. The analytical results show that the particle size, chemical and mineralogical compositions of the silt in the upper, middle and lower reaches of the Yellow River are almost the same and the amount of heavy metals dissolved from the silt is below the regulatory levels for the environmental quality standards for soils of China. The flexural strength of solidified samples reaches 17MPa. The strength development is shown to depend on the formation of tobermorite, and the more the tobermorite, the higher the strength.