Environmental Science and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni Suef, 62511, Egypt.
Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni Suef, 62511, Egypt.
Sci Rep. 2022 Dec 5;12(1):20974. doi: 10.1038/s41598-022-25246-7.
The major objective of this study was to examine the viability of using 5, 10, or 15 mass% of Activated Alum Sludge waste (AAS) instead of Ordinary Portland Cement (OPC) as a pozzolanic ingredient in concrete. This fundamental inquiry framed the investigation and OPC-AAS-hardened composites were studied to see whether they may benefit from inexpensive nanocomposites in terms of improved physical properties, mechanical strength, and resistance to heat and flame. The investigation set out to see how inexpensive nanocomposite might be put to use and the nanoparticles of CuFeO spinel with an average size of less than 50 nm were successfully manufactured. Many different OPC-AAS-hardened composites benefit from the addition of CuFeO spinel, which increases the composites' resistance to fire and enhances their physicomechanical properties at roughly average curing ages. Synthesized CuFeO spinel was shown to have desirable characteristics by TGA/DTG and XRD. By using these methods, we were able to identify a broad variety of hydration yields, including C-S-Hs, C-A-S-Hs, C-F-S-Hs, and Cu-S-Hs, that enhance the physicomechanical properties and thermal resistivity of OPC-AAS-hardened composites as a whole. The composite material comprising 90% OPC, 10% AAS waste, and 2% CuFeO has several positive economic and environmental outcomes.
本研究的主要目的是研究使用 5%、10%或 15%质量比的活性氧化铝污泥（AAS）代替普通波特兰水泥（OPC）作为混凝土中的火山灰成分的可行性。这一基本研究构成了调查的框架，研究了 OPC-AAS 硬化复合材料，以了解它们是否可以从廉价的纳米复合材料中受益，提高物理性能、机械强度以及耐热和耐火焰性。本研究旨在探讨如何利用廉价的纳米复合材料，成功制造出平均粒径小于 50nm 的廉价纳米复合材料氧化铜铁尖晶石。许多不同的 OPC-AAS 硬化复合材料都受益于氧化铜铁尖晶石的添加，这提高了复合材料的防火性能，并在大致平均的固化龄期内增强了其物理机械性能。通过 TGA/DTG 和 XRD 表明合成的氧化铜铁尖晶石具有理想的特性。通过使用这些方法，我们能够确定广泛的水化产物，包括 C-S-Hs、C-A-S-Hs、C-F-S-Hs 和 Cu-S-Hs，这些产物整体上提高了 OPC-AAS 硬化复合材料的物理机械性能和热阻。由 90%OPC、10%AAS 废料和 2%CuFeO 组成的复合材料具有几个积极的经济和环境效益。
