通过回收利用乳化废食用油实现可持续的高强度碱活性矿渣混凝土

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jinguang Huang, Yanlin Huo, Qunshan Su, Dong Lu, Yuanchao Wu, Xinhong Dong, Yang Gao
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引用次数: 0

摘要

为了减轻高强度碱活性矿渣混凝土(AASC)的收缩,本文在 AASC 系统中引入了乳化食用油(ECO)和乳化废食用油(EWCO)。系统地探讨了掺入 ECO 和 EWCO 对 AASC 的抗压强度、干燥收缩、自生收缩、碳化和耐硫酸性能的影响。并根据表面张力和微观结构分析提出了优化机制。实验结果表明,掺入 ECO 和 EWCO 会使 AASC 的抗压强度略微降低 7.8%。有趣的是,掺入 ECO 和 EWCO 能显著降低 AASC 的干燥收缩率和自生收缩率,同时提高 AASC 的抗碳化和抗硫酸性能。具体来说,添加 2 重量百分比的 ECO 和 EWCO 可使 AASC 的自生收缩率分别降低 66.7% 和 41.0%。微观结构观察表明,添加 ECO 和 EWCO 可以降低 AASC 的内表面张力,改善孔隙溶液的传输和扩散,增加炉渣的可吸收自由水,从而降低复合材料的收缩率。它还能增加孔隙溶液中的离子浓度,使 AASC 的反应更加完全,从而优化孔隙结构,进而提高 AASC 的耐久性。这项研究为通过回收废料来开发可持续碱活性矿渣混凝土提出了一条可行的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sustainable high-strength alkali-activated slag concrete is achieved by recycling emulsified waste cooking oil
To mitigate the shrinkage of high-strength alkali-activated slag concrete (AASC), this paper introduces emulsified cooking oil (ECO) and emulsified waste cooking oil (EWCO) into the AASC system. The effects of admixing ECO and EWCO on the compressive strength, drying shrinkage, autogenous shrinkage, carbonation, and sulfuric acid resistance of the AASC are systematically explored. The optimization mechanism is also proposed based on the surface tension and microstructural analysis. The experimental results show that the admixing ECO and EWCO slightly reduce the compressive strength of the AASC by 7.8%. Interestingly, the admixing ECO and EWCO significantly reduce the drying shrinkage and autogenous shrinkage, simultaneously improving the resistance to carbonation and sulfuric acid of the AASC. Specifically, the introduction of 2 wt.% ECO and EWCO can reduce the autogenous shrinkage of the AASC by 66.7% and 41.0%, respectively. Microstructural observations reveal that the addition of ECO and EWCO can reduce the internal surface tension of the AASC, improve the transport and diffusion of the pore solution, and increase the absorbable free water of the slag, which in turn reduces the shrinkage of the composites. It also increases the ionic concentration in the pore solution, resulting in a more complete reaction of the AASC, which can optimize the pore structure and thus improve the durability of the AASC. This study proposes a promising way to develop sustainable alkali-activated slag concrete achieved by recycling waste materials.
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来源期刊
Frontiers in Materials
Frontiers in Materials Materials Science-Materials Science (miscellaneous)
CiteScore
4.80
自引率
6.20%
发文量
749
审稿时长
12 weeks
期刊介绍: Frontiers in Materials is a high visibility journal publishing rigorously peer-reviewed research across the entire breadth of materials science and engineering. This interdisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers across academia and industry, and the public worldwide. Founded upon a research community driven approach, this Journal provides a balanced and comprehensive offering of Specialty Sections, each of which has a dedicated Editorial Board of leading experts in the respective field.
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