埃及偏高岭土增强矿渣生产绿色水泥

Q3 Engineering
A. E. Nagar
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引用次数: 0

摘要

新型地聚合物基材料为未来提供了良好的前景;它们不应被视为长期以来作为参考建筑材料的波特兰水泥的竞争材料,而应被视为具有一系列重要优势的替代材料。偏高岭土(MK)由高岭土材料烧制至750℃,加热速度为5oC/min,加热2 h而产生;氢氧化钠和硅酸钠的比例为6:6 (wt%),可提高水冷渣材料碱活化地聚合物的力学性能和微观结构性能。在本工作中,由于所使用的MK非常细,平均孔结构小于30 mµ,如果使用高的比例,会阻碍地聚合反应,因此MK的添加比例小于总质量的20%。固化在100%相对湿度下,温度为38℃,龄期为7、14、28和90天。通过x射线衍射(XRD)、扫描电镜(SEM)、红外光谱(FTIR)、抗压强度和吸水率等测试手段研究了土聚合物样品的性能。结果表明,掺量为15%的偏高岭土与控制渣的掺量相比,在90天内力学性能有所提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Production of Green Cement from Slag Enhanced by Egyptian Metakaolin Materials
New geopolymer-based materials offer excellent perspectives for the future; they should not be regarded as competitive materials for Portland cement, which has been the reference construction material for so long, but as alternative materials with a series of important advantages to be considered. Metakaolin (MK) produced from firing kaolin material up to 750 oC for 2 h with a heating rate of 5oC/min; leads to an enhancement in mechanical and microstructural properties of alkali activated geopolymer of water cooled slag material using (6:6, wt%) of sodium hydroxide and sodium silicate. In the present work the ratios of MK which will be added are less than 20% of the total mass, because of the used MK was very fine with average pore structure less than 30 mµ, which hinders the geopolymerization reaction if used as high ratio. Curing was performed under 100% relative humidity at a temperature of 38oC and ages of 7, 14, 28 & 90 days. The properties of geopolymer specimens have been studied through measurement of XRD, SEM imaging, FTIR, compressive strength and water absorption. Results showed that the mixes of metakaolin up to 15% results in an enhancement in the mechanical properties as compared with slag control mix up to 90 days.
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来源期刊
Jianzhu Cailiao Xuebao/Journal of Building Materials
Jianzhu Cailiao Xuebao/Journal of Building Materials Engineering-Building and Construction
CiteScore
2.70
自引率
0.00%
发文量
3652
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