Investigation of system construction utilizing the Yellow River sediments

黄河以其高含沙量而闻名于世。在这项研究中，我们调查了一个潜在的利用河床沉积物作为原料合成砖和建筑结构。在343- 476 K的饱和蒸汽压下，通过引入氢氧化钙或煅烧沉积物，对河床沉积物进行了24 h的水热固化。固化物的抗折强度达到20 MPa以上。水热固化沉积物的硬化机制包括在反应过程中形成的硅酸钙水合物。

The Yellow River is worldwide well-known for its high sediment concentration. In this study, we investigated a potential utilization of the riverbed sediments as a raw material for synthesis of bricks and building constructions. Hydrothermal solidification of the riverbed sediments was carried out under saturated steam pressure at 343-476K for 24h by calcium hydrate introduction or using the calcined sediments. The flexural strength of the solidified sediments reached over 20MPa. The hardening mechanism of the hydrothermally solidified sediments consisted in formation of calcium silicate hydrates during the reaction.