Reservoir sediments create a range of severe problems for hydropower dams. Although reservoir sediments can be excavated, nonetheless, sizeable dumping lands for such excavated sediments are unavailable at this time. This paper presents an experimental investigation of the destructive and nondestructive properties and microstructural characteristics of reservoir sediments solidified with fly ash–cement blend for reuse as construction materials. The obtained natural sediment was classified as well-graded sand with silt. The destructive experiments comprised unconfined compression, indirect tension, California bearing ratio, resilient modulus, and durability against wet–dry cycle tests, while the nondestructive experiments included a free–free resonance test. Microstructural investigations consisting of X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, and energy-dispersive X-ray spectrometry were performed to verify the macroscale test results. The results showed that fly ash–cement blend exhibited increased strength values on the order of 2 to 9 times that of unsolidified sediments. Using fly ash-blended cement was more effective than using sole cement or sole fly ash, and mixtures with 10% fly ash delivered the best strength and modulus values. Various functional empirical correlations were proposed. Utilizing six wet–dry cycles is acceptable because the strength of the samples subjected to the six wet–dry cycles was lower than the given value. The results of the peak intensities of calcium silicate hydrate, mass losses, calcium contents, and scanning electron microscopy images derived from the microstructural investigations confirmed the macroscale test results.

水库沉积物给水电大坝带来了一系列严重问题。尽管可以挖掘水库沉积物，但目前还没有可用于此类挖掘的沉积物的大型倾倒场。本文介绍了用粉煤灰-水泥混合物固化的储层沉积物作为建筑材料再利用的破坏性和非破坏性特性和微观结构特征的实验研究。获得的天然沉积物被分类为具有粉砂的细砂。破坏性实验包括无侧限压缩、间接拉伸、加利福尼亚轴承比、弹性模量和干湿循环耐久性测试，而无损实验包括自由-自由共振测试。微观结构研究包括 X 射线衍射、热重分析、进行扫描电子显微镜和能量色散X射线光谱仪以验证宏观测试结果。结果表明，粉煤灰-水泥混合物的强度值提高了未固化沉积物的 2 到 9 倍。使用粉煤灰混合水泥比使用单一水泥或单一粉煤灰更有效，并且含有 10% 粉煤灰的混合物提供了最佳强度和模量值。提出了各种功能经验相关性。使用六个干湿循环是可以接受的，因为经过六个干湿循环的样品的强度低于给定值。由微观结构研究得出的水合硅酸钙峰值强度、质量损失、钙含量和扫描电子显微镜图像的结果证实了宏观测试结果。