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Development of Cleaner One-Part Geopolymer from Lithium Slag
Journal of Cleaner Production ( IF 11.1 ) Pub Date : 2020-11-24 , DOI: 10.1016/j.jclepro.2020.125241
Syed Farasat Ali Shah , Bing Chen , Muhammad Riaz Ahmad , M. Aminul Haque

In this study, lithium slag waste was utilized for the development of eco-friendly ambient cured one-part geopolymer. Lithium slag and blast furnace slag were employed as alumino-silicate precursors and anhydrous sodium silicate as alkaline activator. Fresh properties were assessed using setting time and flowability tests, while compressive strength, flexure strength, water absorption and drying shrinkage tests were performed to evaluate hardened properties of newly developed geopolymer mix. X-ray Diffraction analysis (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy examination (SEM) were performed to evaluate the chemical functional groups and microstructure of the mix. The environmental impact analysis was determined through measurement of carbon dioxide equivalent (CO2-e) of constituents. The experimental investigation revealed that blast furnace slag addition in lithium slag based geopolymers improved its reactivity and hardening was achieved at room temperature. The 57 MPa compressive strength was achieved, which is comparable with other one-part geopolymers prepared using similar precursors. The improvement in mechanical strength can be attributed to enhanced geopolymerization reaction and improvement in gel structure as observed through microstructural testing.



中文翻译:

用锂渣开发清洁的单组分地质聚合物

在这项研究中,锂渣废料被用于开发环保型环境固化单组分地质聚合物。锂渣和高炉渣被用作硅铝酸盐的前体,而无水硅酸钠被用作碱性活化剂。使用凝固时间和流动性测试评估新鲜特性,同时进行抗压强度,挠曲强度,吸水率和干燥收缩率测试,以评估新开发的地质聚合物混合物的硬化性能。进行了X射线衍射分析(XRD),傅立叶变换红外光谱(FTIR)和扫描电子显微镜检查(SEM)以评估混合物的化学官能团和微观结构。通过测量二氧化碳当量(CO 2-e)的成分。实验研究表明,将高炉矿渣添加到锂渣基地质聚合物中可提高其反应性,并在室温下实现硬化。达到了57 MPa的抗压强度,这与使用类似前体制备的其他单组分地质聚合物相当。机械强度的提高可归因于通过微观结构测试观察到的增强的地聚反应和凝胶结构的改进。

更新日期:2020-11-25
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