School of Engineering, RMIT University, Melbourne, Victoria, Australia.
Sci Total Environ. 2022 Mar 15;812:151423. doi: 10.1016/j.scitotenv.2021.151423. Epub 2021 Nov 4.
The use of single-use nitrile gloves has been on a sharp incline since the Coronavirus pandemic first started in late 2019. This led to a significant increase in the generation of this clinical waste that requires various recycling solutions to reduce its environmental impact from disposal or incineration. This paper explores its application in structural concrete by adding shredded nitrile gloves at 0.1%, 0.2%, and 0.3% of the volume of concrete. The compressive strength, modulus of elasticity, ultrasonic pulse velocity, and SEM-EDS analysis were undertaken to ascertain the effect of different concentrations of shredded nitrile gloves on the mechanical properties, quality of concrete, and its bond performance with the cement matrix. The results demonstrate that the inclusion of up to 0.2% of shredded nitrile gloves can provide ~22% improvement in the compressive strength of blended concrete composites at 28-days of curing. In comparison, the inclusion of 0.3% of shredded nitrile gloves shows improvements of ~20% in compressive strength at 28-days. The SEM-EDS analysis shows a very good bond formation between the nitrile rubber and the cement matrix with no gap identified in the interfacial transition zone (ITZ).
自 2019 年底冠状病毒大流行首次爆发以来，一次性丁腈手套的使用呈急剧上升趋势。这导致这种临床废物的产生显著增加，需要各种回收解决方案来减少其处置或焚烧造成的环境影响。本文通过在混凝土体积中添加 0.1%、0.2%和 0.3%的切碎丁腈手套，探索其在结构混凝土中的应用。进行了抗压强度、弹性模量、超声波脉冲速度和 SEM-EDS 分析，以确定不同浓度的切碎丁腈手套对机械性能、混凝土质量及其与水泥基体粘结性能的影响。结果表明，在 28 天的养护期内，掺入高达 0.2%的切碎丁腈手套可使掺合混凝土复合材料的抗压强度提高约 22%。相比之下，掺入 0.3%的切碎丁腈手套可使 28 天的抗压强度提高约 20%。SEM-EDS 分析表明，丁腈橡胶与水泥基体之间形成了非常好的粘结，界面过渡区（ITZ）中没有发现间隙。
