Department of Civil Engineering, Munzur University, 62000, Tunceli, Turkey.
Environ Sci Pollut Res Int. 2022 Jul;29(34):51927-51941. doi: 10.1007/s11356-022-19557-5. Epub 2022 Mar 7.
Due to its fine particle size, waste marble slurry originating in cutting and processing units mixes into the air after drying, causing environmental and health problems in nearby areas. On the other hand, large amounts of iron particles are generated as metalworking industry waste, affecting the environmental system. In this study, 0%, 10%, and 20% marble powder (instead of cement) and iron particles (instead of fine aggregate) were used in mixtures, and the composites produced were subjected to two different curing periods: 7 and 28 days. The physical, mechanical, microstructural, and thermal properties of the fresh and hardened composites were ascertained via bulk density, consistency, porosity, water absorption, capillary water absorption, strength tests, particle size distribution, X-ray diffraction (XRF), X-ray fluorescence (XRF), scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS), and thermogravimetric analyses (TGA). The results revealed that minimum water absorption (8.5%) and porosity (19.8%) values were achieved in 28-day composites produced with 10% marble-20% iron wastes among all composites. Thus, iron particles substituted for natural aggregates were mainly responsible for the increase in mechanical performance. A maximum flexural strength of 5.9 MPa and a compressive strength of 26.7 MPa were observed in 28-day composites containing 0% marble-20% iron wastes. Furthermore, capillary water absorption tended to decrease with the substitution of 10% marble powder.
由于粒径细小，废弃的大理石浆在干燥后会混入空气中，对附近地区造成环境和健康问题。另一方面，金属加工业会产生大量的铁颗粒，影响环境系统。在这项研究中，0%、10%和 20%的大理石粉（代替水泥）和铁颗粒（代替细骨料）被用于混合物中，所生产的复合材料经历了两个不同的养护期：7 天和 28 天。通过体积密度、稠度、孔隙率、吸水率、毛细吸水率、强度测试、粒度分布、X 射线衍射（XRF）、X 射线荧光（XRF）、扫描电子显微镜和能谱分析（SEM-EDS）以及热重分析（TGA）来确定新拌和硬化复合材料的物理、力学、微观结构和热性能。结果表明，在所有复合材料中，用 10%大理石-20%铁废料制成的 28 天复合材料的吸水率（8.5%）和孔隙率（19.8%）最低。因此，铁颗粒代替天然骨料主要负责提高机械性能。在含有 0%大理石-20%铁废料的 28 天复合材料中，观察到最大的弯曲强度为 5.9MPa 和抗压强度为 26.7MPa。此外，随着 10%大理石粉的替代，毛细吸水率呈下降趋势。
