Ali Tariq, Qureshi Muhammad Zeeshan, Inam Inamullah, Kahla Nabil Ben, Ahmed Hawreen, Ajwad Ali, Adnan Muhammad
Department of Civil Engineering, Swedish College of Engineering and Technology, Wah, 47080, Pakistan.
Department of Civil Engineering, University of Engineering and Technology, Taxila, Pakistan.
Sci Rep. 2025 Jul 28;15(1):27512. doi: 10.1038/s41598-025-13277-9.
This exploratory study investigates the use of waste foundry sand (WFS), combined with supplement cementitious materials (SCMs), in concrete production. The Preliminary Investigation is based on three groups, where the first group studies different percentages of natural sand replacement with WFS (i.e. 5%, 10%, 15% and 20%), the second group analyses the addition of 5% silica fume with WFS, and the third group observes 10% metakaolin inclusion with WFS. The studied parameters include density, nondestructive test (UPV), compressive and tensile strength, acid resistance, and environmental benefit analysis. According to the results, the compressive strength of the concrete mix is enhanced by 17% by adding 20% WFS and 5% silica fume, and this value increases by 23% when adding an additional 10% metakaolin. Furthermore, the use of 20% WFS leads to a 3.27% decrease in the cost of concrete as compared to the control mix, with a decrease of 2.1% and 5.1% for silica and metakaolin-containing mixes, respectively.
本探索性研究调查了废铸造砂（WFS）与补充胶凝材料（SCMs）相结合在混凝土生产中的应用。初步调查基于三组，第一组研究用WFS替代不同比例天然砂的情况（即5%、10%、15%和20%），第二组分析WFS中添加5%硅灰的情况，第三组观察WFS中包含10%偏高岭土的情况。研究参数包括密度、无损检测（超声脉冲速度）、抗压和抗拉强度、耐酸性以及环境效益分析。根据结果，添加20%WFS和5%硅灰可使混凝土混合料的抗压强度提高17%，再额外添加10%偏高岭土时，该值提高23%。此外，与对照混合料相比，使用20%WFS可使混凝土成本降低3.27%，含硅灰和偏高岭土的混合料成本分别降低2.1%和5.1%。
