赤泥在胶凝材料中的应用研究进展

Research progress in application of red mud in cementitious materials

赤泥作为我国大宗固废来源之一,在当前经济技术条件下利用率仍较低,探索赤泥开发利用的新途径,对我国的环境保护和经济发展具有重要意义。对赤泥的种类和性能进行简要评述,指出将赤泥用于水泥和混凝土,能够在一定程度上缓解赤泥大量堆存所造成的环境问题。但是赤泥的碱含量高,难以实现其在传统建筑材料领域的大规模利用,必须进行脱碱预处理以降低其碱含量;高碱性赤泥在碱激发胶凝材料中表现出巨大的应用潜力,以活化赤泥为主要原料能够制备出性能优异的赤泥基胶凝材料,是实现赤泥综合利用的一条重要途径。

Red mud,as one of the largest solid waste streams in China,still has a low utilization rate under the current economic and technological conditions.Exploring new methods for the utilization of red mud is of great significance to the environmental protection and economic development of China.This paper briefly reviews the types and properties of red mudand points out that the application of red mud in cement and concrete can alleviate the environmental issues caused by its massive storage to some extent.However,because of its high alkali content,red mud cannot be utilized in the field of traditional construction materials on a large-scale.Thus,the dealkalization pretreatment of red mud is necessary.On the other hand,red mud with high alkali content exhibits great application potential for alkali activated cementitious materials.Red mud-based cementitious materials with excellent properties can be prepared from activated red mud,which is an important way to achieve the comprehensive utilization of red mud.