Li Zipei, Wang Yu, Zhang Jiale, Wang Yipu, Zhang Na, Liu Xiaoming, Sun Yinming
School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China.
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Materials (Basel). 2025 Jul 17;18(14):3360. doi: 10.3390/ma18143360.
Phosphorous slag is an industrial by-product generated in the process of producing yellow phosphorus by electric furnace, which occupies a substantial number of land resources and causes serious environmental pollution. The comprehensive utilization of phosphorous slag is a major topic relevant to the sustainability of the yellow phosphorus industry. In this paper, we attempted to utilize phosphorous slag as a supplementary cementing material to prepare silica-aluminum based cementitious material (SAC-PHS). To determine how phosphorus influences the early-age hydration reaction process of silica-aluminum based cementitious material, three groups of samples, PHS, PHS, and PHS, with better mechanical properties were selected to deeply investigate their one-week hydration characteristics. Characterization results showed that the main hydration products of SAC-PHS were C-A-S-H gels and ettringite. PHS specimen produced more C-A-S-H gels and ettringite than the other two samples after one-week hydration. Interestingly, the P/Si atomic ratio indicated that chemical bonds were formed between Si and P during the formation of C-A-S-H gels, which improved the strength of SAC-PHS. Our findings offer valuable insights for the application of phosphorous slag in construction and building materials and promote the efficient resource utilization of phosphorous residue.
磷渣是电炉法生产黄磷过程中产生的一种工业副产品，它占用大量土地资源并造成严重环境污染。磷渣的综合利用是与黄磷行业可持续性相关的一个重大课题。在本文中，我们尝试利用磷渣作为辅助胶凝材料来制备硅铝基胶凝材料（SAC-PHS）。为了确定磷如何影响硅铝基胶凝材料的早期水化反应过程，选择了三组力学性能较好的样品PHS、PHS和PHS，深入研究它们的一周水化特性。表征结果表明，SAC-PHS的主要水化产物是C-A-S-H凝胶和钙矾石。一周水化后，PHS试样比其他两个样品产生了更多的C-A-S-H凝胶和钙矾石。有趣的是，P/Si原子比表明在C-A-S-H凝胶形成过程中Si和P之间形成了化学键，这提高了SAC-PHS的强度。我们的研究结果为磷渣在建筑和建筑材料中的应用提供了有价值的见解，并促进了磷渣的高效资源利用。
