Guo Jianmin, Xu Xizhong, Song Xiaohui, Wei Jincheng, Shi Wencheng, Xia Yu
Shandong Hi-Speed Company Limited, Jinan, China.
Shandong Transportation Institute, Jinan, China.
PLoS One. 2025 Jun 3;20(6):e0318862. doi: 10.1371/journal.pone.0318862. eCollection 2025.
Through physical and chemical reactions in the presence of phosphogypsum, steel slag and fly ash modify the load-bearing skeleton and fill the pores of the wasted soil, resulting in high-strength performance. Extensive experiments that compared Portland cement with phosphogypsum-fly ash-steel slag-based cement (PFS cement) revealed that the later-stage unconfined compressive strength (UCS) of PFS cement exceeded that of Portland cement by approximately 33.18%. In terms of the stress-strain curve, the maximum stress and yield strength of PFS cement-stabilized waste soil were 40% to 50% higher than those of Portland cement. In the dry-wet cycle resistance experiment, PFS cement-stabilized waste soil showed a compressive strength increase of 15.17% over Portland cement. Furthermore, during the freeze-thaw cycle test, PFS cement-stabilized waste soil demonstrated a 29.95% higher performance compared to Portland cement. When used as a solidifying agent, PFS cement exhibits significant advantages over Portland cement in backfilling for underground engineering, trenches, roadbeds, bridge abutments, and road base layers.
在磷石膏、钢渣和粉煤灰存在的情况下，通过物理和化学反应，钢渣和粉煤灰改变了承重骨架并填充了废弃土的孔隙，从而产生高强度性能。大量将波特兰水泥与磷石膏 - 粉煤灰 - 钢渣基水泥（PFS水泥）进行比较的实验表明，PFS水泥的后期无侧限抗压强度（UCS）比波特兰水泥高出约33.18%。就应力 - 应变曲线而言，PFS水泥稳定废弃土的最大应力和屈服强度比波特兰水泥高40%至50%。在抗干湿循环试验中，PFS水泥稳定废弃土的抗压强度比波特兰水泥提高了15.17%。此外，在冻融循环试验中，PFS水泥稳定废弃土的性能比波特兰水泥高出29.95%。当用作固化剂时，PFS水泥在地下工程回填、沟渠、路基、桥台和道路基层方面比波特兰水泥具有显著优势。
