Yang Renhe, Zhang Pengyu, Li Jiaqi, Huang Tianyong, Wang Dongmei, Sun Qian, Liang Zengyun, Xu Rongsheng, Da Yongqi
State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing Building Materials Academy of Sciences Research, Beijing 100041, China.
Tianjin Building Materials Academy of Sciences Research, Tianjin 300381, China.
Langmuir. 2025 Jun 24;41(24):15243-15254. doi: 10.1021/acs.langmuir.4c05062. Epub 2025 Jun 11.
Improving the performance of a high belite clinker (HBC) by selecting appropriate blended materials is of great significance for its large-scale promotion and application. This research attempted to use dihydrate gypsum (DGP), fly ash (FA), and ground granulated blast furnace slag (GGBS) to prepare HBC + DGP (95% HBC + 5% DGP), HBC + FA (82% HBC + 3% DGP + 15% FA), and HBC + GGBS (82% HBC + 3% DGP + 15% GGBS) and explored the influence of different blended materials on various properties of HBC. In addition, the mechanism of the interaction between HBC and different blended materials in early and late stages was also revealed. The experimental results showed that GGBS had the most significant impact on HBC, mainly manifested in optimizing the particle distribution of HBC, increasing the standard consistency water demand of HBC, and shortening the setting time of the HBC paste. The improvement of the mechanical property of HBC by GGBS was its main advantage. Compared with HBC + DGP, the compressive strength of HBC + GGBS mortar increased by 113.9% and 43.5% at 7 and 28d, respectively. It was found that the addition of GGBS could increase the HBC second hydration exothermic peak to 15.4 mW/g. Further analysis proved that in the early stage, strong polarity OH could dissociate the Ca-O and Si-O bonds on the glass phase of the GGBS surface, and the released Caand SiO combined to form CH and C-S-H nanocrystalline nuclei, which could reduce the nucleation barrier of CH crystal and effectively promote CS acceleration reaction. In the hydration later stage, the pozzolanic effect was utilized to generate more C-S-H, which could fill the pore of the cement matrix. This further enhanced the compressive strength of the HBC + GGBS mortar.
通过选择合适的混合材来提高高贝利特水泥熟料（HBC）的性能对其大规模推广应用具有重要意义。本研究尝试使用二水石膏（DGP）、粉煤灰（FA）和磨细粒化高炉矿渣（GGBS）制备HBC + DGP（95% HBC + 5% DGP）、HBC + FA（82% HBC + 3% DGP + 15% FA）和HBC + GGBS（82% HBC + 3% DGP + 15% GGBS），并探究不同混合材对HBC各项性能的影响。此外，还揭示了HBC与不同混合材在早期和后期的相互作用机理。实验结果表明，GGBS对HBC的影响最为显著，主要表现为优化HBC的颗粒分布、增加HBC的标准稠度需水量以及缩短HBC净浆的凝结时间。GGBS提高HBC力学性能是其主要优势。与HBC + DGP相比，HBC + GGBS砂浆在7d和28d的抗压强度分别提高了113.9%和43.5%。发现添加GGBS可使HBC二次水化放热峰提高至15.4 mW/g。进一步分析证明，在早期，强极性OH可使GGBS表面玻璃相上的Ca - O和Si - O键解离，释放出的Ca和SiO结合形成CH和C - S - H纳米晶核，可降低CH晶体的成核势垒并有效促进CS加速反应。在水化后期，利用火山灰效应生成更多的C - S - H，可填充水泥基体孔隙。这进一步提高了HBC + GGBS砂浆的抗压强度。
