Study on the Collaborative Preparation of Red Mud-Fly Ash Geopolymer UsingSlag and Carbide Slag
NIE Qingke1,2,*, LI Huawei1,3, ZHANG Haiqing1,4, ZHANG Rihua1,3, KONG Depeng5
1 China Hebei Construction & Geotechnical Investigation Group Ltd., Shijiazhuang 050227, China 2 Geotechnical Engineering Technology Research Center of Hebei Province, Shijiazhuang 050227, China 3 Key Laboratory for Industrial Solid Waste Comprehensive Utilization of Hebei Province, Shijiazhuang 050227, China 4 College of Civil Engineering and Architecture, Hebei University, Baoding 071002, Hebei, China 5 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Abstract: Red mud (RM) and fly ash (FA) can be alkali-activated to synthesize geopolymers, yet their mechanical strength remains limited under ambient curing conditions. In this work, an enhanced RM-FA geopolymer system was proposed by incorporating ground granulated blast furnace slag (GGBS) and carbide slag (CS) as supplementary calcium activators, forming RM-FA-GGBS (RFG) and RM-FA-CS (RFC) composites, respectively. For comparison, a cement-modified control group (RM-FA-OPC, RFO) with equivalent ordinary Portland cement (OPC) content was prepared. The effects of GGBS and CS content (4%, 8%, 12%) on mechanical performance and microstructural evolution were systematically investigated through compressive strength tests, phase analysis (XRD), pore structure characterization (MIP), and morphological observation (SEM-EDS). Results demonstrate that low additions of GGBS or CS (≤8%) effectively optimize the geopolymerization process by introducing reactive Ca, facilitating the co-precipitation of C-(A)-S-H gels with crystalline ettringite (AFt) and hydrocalumite. This synergy enhances both microstructural densification and mechanical strength. However, excessive activators (＞8%) induce rapid reaction, generating discontinuous pores that compromise long-term strength. Notably, RFO-12% exhibits higher late-stage strength than RFG-12%, despite its inferior early strength compared to RFG-12%. The findings highlight that GGBS incorporation significantly improves room-temperature geopolymerization efficiency in RM-FA systems, offering a viable low-carbon material for construction applications such as pavement bases and composite foundations.
聂庆科, 李华伟, 张海清, 张日华, 孔德朋. 矿粉、电石渣协同制备赤泥-粉煤灰地质聚合物的研究[J]. 材料导报, 2026, 40(9): 25020016-7.
NIE Qingke, LI Huawei, ZHANG Haiqing, ZHANG Rihua, KONG Depeng. Study on the Collaborative Preparation of Red Mud-Fly Ash Geopolymer UsingSlag and Carbide Slag. Materials Reports, 2026, 40(9): 25020016-7.
1 Niu A Y, Lin C X.Journal of Environmental Management, 2024, 351, 119660. 2 Bai J W, Hu X Z, Feng G R, et al.Mining Safety & Environmental Protection, 2025, 52(6), 57(in Chinese). 白锦文, 胡鑫哲, 冯国瑞, 等.矿业安全与环保, 2025, 52(6), 57. 3 Pan X L, Lyu Z Y, Wu H F, et al.The Chinese Journal of Nonferrous Metals, 2023, 33(11), 3879 (in Chinese). 潘晓林, 吕中阳, 吴鸿飞, 等.中国有色金属学报, 2023, 33(11), 3879. 4 Yang H P, Bai B, Nie Q K.Rock and Soil Mechanics, 2017, 38(S1), 299 (in Chinese). 杨海朋, 白冰, 聂庆科.岩土力学, 2017, 38(S1), 299. 5 Nie Q K, Hu W, Huang B S, et al.Journal of Hazardous Materials, 2019, 369, 503. 6 Shao Y, Ma S L, Li S Y, et al.Journal of Cleaner Production, 2024, 439, 140882. 7 Li Z P, Gao M S, Lei Z X, et al.Case Studies in Construction Materials, 2023, 19, e02410. 8 Uysal M, Dilbas H, ÇoŞgun T, et al.Construction and Building Materials, 2024, 425, 135915. 9 Wang Q W, Han S, Yang J H, et al.Construction and Building Materials, 2023, 409, 133730. 10 Liu J R, Doh J H, Ong D E L, et al.Journal of Building Engineering, 2023, 71, 106559. 11 He J Y, Guo T, Li Z F, et al.Materials Chemistry and Physics, 2024, 314, 128807. 12 Hu W, Nie Q K, Huang B S, et al.Construction and Building Materials, 2018, 191, 1120. 13 Hu W, Nie Q K, Huang B S, et al.Journal of Cleaner Production, 2018, 186, 799. 14 Nie Q K, Hu W, Ai T, et al.Construction and Building Materials, 2016, 125, 905. 15 Hu W, Nie Q K, Huang B S, et al.Journal of Cleaner Production, 2019, 215, 1481. 16 Bai B, Bai F, Nie Q K, et al.Powder Technology, 2023, 416, 118242. 17 Wang Q, Kang S R, Wu L M, et al.Journal of Building Materials, 2020, 23(1), 184 (in Chinese). 王晴, 康升荣, 吴丽梅, 等.建筑材料学报, 2020, 23(1), 184. 18 Wu C Z, Li C, Li Z L, et al.Journal of Materials Science and Engineering, 2024, 42(3), 478 (in Chinese). 吴成志, 李成, 李中林, 等.材料科学与工程学报, 2024, 42(3), 478. 19 Cui W W, Dong X Q, Duan W, et al.Construction and Building Materials, 2024, 418, 135439. 20 An Q, Pan H M, Zhao Q X, et al.Journal of Building Materials, 2023, 26(1), 14 (in Chinese). 安强, 潘慧敏, 赵庆新, 等.建筑材料学报, 2023, 26(1), 14. 21 Li Y J, Duan S Y, Wu H, et al.Bulletin of the Chinese Ceramic Society, 2025, 44(3), 1041(in Chinese). 李钰佳, 段思宇, 吴浩, 等.硅酸盐通报, 2025, 44(3), 1041. 22 Li Z F, Liu C, Wang C, et al.Advanced Engineering Sciences, 2021, 53(1), 203 (in Chinese). 李召峰, 刘超, 王川, 等.工程科学与技术, 2021, 53(1), 203. 23 Shi Y X, Zhao Q X, Xue C H, et al.Cement and Concrete Composites, 2023, 139, 104999. 24 Kong X F, Guo Y, Xue S G, et al.Journal of Cleaner Production, 2017, 143, 224. 25 An Q, Pan H M, Zhao Q X, et al.Construction and Building Materials, 2022, 356, 129279.
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2026, Vol. 40 
