富铁碱活化材料在Na2SO4溶液中的性能:MgO/(MgO + CaO)在炉渣中的作用

International Conference on Raw Materials and Circular Economy Pub Date : 2022-04-02 DOI:10.3390/materproc2021005125

N. Wen, A. Peys, T. Hertel, Y. Pontikes

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引用次数: 1

摘要

为了使有色金属冶金渣在碱活性材料(AAMs)中的使用成为可能，必须更好地了解渣的化学成分对耐久性的影响。本文采用不同MgO/(MgO + CaO)质量比合成了两种矿渣，研究了其对AAMs抗硫酸钠(na2so4)性能的影响。实验结果表明，MgO/(MgO + CaO)比的增加并不会导致强度的提高，但在na2so4暴露24周后，两种aam的质量变化和抗压强度变化趋势非常相似。na2so4暴露过程中元素(Na、Al和Si)的浸出在早期较为明显，而Ca的浸出在后期较为明显。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance of Fe-Rich Alkali-Activated Materials in Na2SO4 Solution: Role of MgO/(MgO + CaO) in the Slag

: To enable the usage of non-ferrous metallurgy slags in alkali-activated materials (AAMs), the inﬂuence of the chemical composition of slags on durability must be better understood. In this work, two slags were synthesized with different MgO/(MgO + CaO) weight ratios to investigate the effect on the sulfate resistance (Na 2 SO 4 ) of AAMs. Experimental results suggested that a higher MgO/(MgO + CaO) ratio does not lead to higher strength, but the trend of the mass change and compressive strength change of two AAMs is quite similar upon Na 2 SO 4 exposure for 24 weeks. The leaching of elements (Na, Al, and Si) during Na 2 SO 4 exposure is more signiﬁcant in the early stage, while Ca leaching is more pronounced in the late stage.

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International Conference on Raw Materials and Circular Economy

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