Circulating fluidized bed fly ash (CFA) is a dusty solid waste containing unstable components (SO₃ and f-CaO) and heavy metals from coal-fired power plants, and its comprehensive utilization rate is less than 25 wt%. This research aims to increase the utilization of CFA under the synergy of CFA, red mud (RM) and blast furnace slag (BFS). In this study, CFA-based green cementitious materials (CGM10) are prepared with 10 wt% RM, 30 wt% CFA, 20 wt% BFS, and 40 wt% clinker. The utilization of f-CaO and SO₃ from CFA and Na⁺ from RM is enhanced by alkaline RM in CGM10. Importantly, the f-CaO, SO₃, and Na⁺ in RM are utilized to generate C–S–H gel, ettringite, and N-A-S-H gel, which are conducive to increasing the strength and volume stability in CGM. Hence, the dosage of CFA in the cementitious material is optimized to 30 wt%. The high dense microstructure and excellent Si–Al polymer structure are found in CGM10-28d. In addition, Na, As, Cd, and Hg in CGM10 are well consolidated by the adsorption of gel products and the formation of new minerals, and their leaching results meet the standards of the World Health Organization (WHO). Therefore, this work provides a feasible reference for the resource utilization of CFA, RM and BFS to prepare green cementitious materials.

循环流化床粉煤灰（CFA）是燃煤电厂产生的含有不稳定组分（SO _{3和f-CaO）和重金属的粉尘状固体废物，其综合利用率低于25 wt%。}本研究旨在通过 CFA、赤泥 (RM) 和高炉渣 (BFS) 的协同作用提高 CFA 的利用率。在本研究中，CFA 基绿色胶凝材料 (CGM10) 由 10 wt% RM、30 wt% CFA、20 wt% BFS 和 40 wt% 熟料制备。在 CGM10 中，碱性 RM 提高了来自 CFA的 f-CaO 和 SO _{3以及来自 RM 的 Na} ^{+的利用率。}重要的是，f-CaO、SO ₃和 Na ⁺在 RM 中用于生成 C-S-H 凝胶、钙矾石和 NASH 凝胶，有利于增加 CGM 的强度和体积稳定性。因此，胶凝材料中 CFA 的用量优化为 30 wt%。在 CGM10-28d 中发现了高致密的微观结构和优异的 Si-Al 聚合物结构。此外，CGM10中的Na、As、Cd和Hg通过凝胶产物的吸附和新矿物的形成得到很好的固结，其浸出结果符合世界卫生组织（WHO）的标准。因此，该工作为CFA、RM和BFS的资源化利用制备绿色胶凝材料提供了可行的参考。