Yooprasertchai Ekkachai, Khursheed Ahsan, Qureshi Muhammad Irshad, Ejaz Ali, Hussain Qudeer, Jirasakjamroonsri Amorntep, Saingam Panumas
Department of Civil Engineering, Faculty of Engineering, Construction Innovations and Future Infrastructure Research Center (CIFIR), King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand.
Department of Civil Engineering, University of Engineering and Technology, Taxila, 47050, Pakistan.
Sci Rep. 2024 Sep 27;14(1):22051. doi: 10.1038/s41598-024-73236-8.
This study focused on sustainable and novel development of concrete through treated and untreated plastic waste aggregates. In this study, the surface of Elec-waste coarse aggregates was treated with sulfuric acid, marble dust coating, silica fume coating, and alkaline bleach. Elec-waste aggregates were used in concrete by replacing natural coarse aggregates in amounts of 10%, 20%, and 30%. The 10%, 20%, and 30% Elec-waste replacement ratios resulted in the compressive strength reduction of 8.97%, 27.99%, and 42.01%, respectively. The same percentage of Elec-waste aggregates reduced the splitting tensile strength by 21.77%, 35.89%, and 47.89%, respectively. However, the slump was observed to increase by 41.4%, 52.1%, and 68.8%, respectively. All the considered treatments enhanced the performance of Elec-waste aggregate concrete (E-WAC). Overall, the best improvement in the performance of E-WAC was imparted by silica fume coating, irrespective of the quantity of Elec-waste aggregates. The present study proposed an expression to estimate the reduction of the compressive strength of E-WAC. It was demonstrated that the equation by JCI-08 predicted splitting tensile strength of E-WAC close to experimental results.
本研究聚焦于通过处理和未处理的塑料废骨料实现混凝土的可持续和创新性发展。在本研究中，对电子废弃物粗骨料的表面进行了硫酸处理、大理石粉涂层处理（大理石粉涂覆）、硅灰涂层处理（硅灰涂覆）以及碱性漂白处理。通过分别替代10%、20%和30%的天然粗骨料，将电子废弃物骨料用于混凝土中。10%、20%和30%的电子废弃物替代率分别导致抗压强度降低了8.97%、27.99%和42.01%。相同比例的电子废弃物骨料分别使劈裂抗拉强度降低了21.77%、35.89%和47.89%。然而，坍落度分别增加了41.4%、52.1%和68.8%。所有考虑的处理方法均提高了电子废弃物骨料混凝土（E-WAC）的性能。总体而言，无论电子废弃物骨料的用量如何，硅灰涂层对E-WAC性能的改善效果最佳。本研究提出了一个用于估算E-WAC抗压强度降低值的表达式。结果表明，JCI - 08公式预测的E-WAC劈裂抗拉强度与实验结果相近。
