利用生物二氧化硅作为偏高岭土基土工聚合物的活性硅源

IF 2.2 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Minerals Pub Date : 2024-08-12 DOI:10.3390/min14080816
Haozhe Guo, Zhihao Huang, Thammaros Pantongsuk, Ting Yu, Baifa Zhang, Jinghan Luo, Peng Yuan
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引用次数: 0

摘要

本研究探讨了生物二氧化硅(包括硅藻和硅藻土)作为偏高岭土基土工聚合物替代硅源的潜力。硅藻土由富含无定形二氧化硅的硅藻头化石组成,而硅藻则是可再生生物二氧化硅的可持续来源。通过傅立叶变换红外光谱、X 射线衍射和扫描电镜等详细分析,该研究评估了这些生物硅源对土工聚合物抗压强度和微观结构的影响,并将它们与传统的硅酸钠进行了比较。结果表明,硅藻表现出巨大的潜力,在质量分数为 30% 的情况下,28 天强度可达 17.9 兆帕,而硅藻土在添加率为 50% 的情况下,28 天强度可达 26.2 兆帕,显示了它们作为活性硅源的潜力。此外,研究还阐明了生物硅石中的有机物对土工聚合的作用,强调了有机物对活性二氧化硅释放和产品强度性能的影响。这项研究提出了一种新的途径,通过利用硅藻中的生物二氧化硅来提高土工聚合物的可持续性,从而促进生态高效建筑材料的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Utilisation of Biosilica as Active Silica Source for Metakaolin-Based Geopolymers
This study explores the potential of biosilica including diatom and diatomaceous earth as alternative silica sources for metakaolin-based geopolymers. Diatomaceous earth, composed of fossilised diatom frustules rich in amorphous silica, and diatoms, a sustainable source of renewable biosilica, are investigated for their effectiveness in enhancing geopolymer properties. Through detailed analyses including FTIR, XRD, and SEM, the study evaluates the impact of these biosilica sources on geopolymer compressive strength and microstructure, comparing them with conventional sodium silicate. Results show that diatoms exhibit significant promise, achieving 28-day strength up to 17.9 MPa at a 30% mass fraction, while diatomaceous earth reaches 26.2 MPa at a 50% addition rate, demonstrating their potential as active silica sources. Furthermore, the study elucidates the role of organic matter in biosilica on geopolymerisation, highlighting its influence on active silica release and the strength performance of products. This study proposes a novel pathway to enhance the sustainability of geopolymers through the utilisation of biosilica from diatoms, contributing to advancements in eco-efficient construction materials.
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来源期刊
Minerals
Minerals MINERALOGY-MINING & MINERAL PROCESSING
CiteScore
4.10
自引率
20.00%
发文量
1351
审稿时长
19.04 days
期刊介绍: Minerals (ISSN 2075-163X) is an international open access journal that covers the broad field of mineralogy, economic mineral resources, mineral exploration, innovative mining techniques and advances in mineral processing. It publishes reviews, regular research papers and short notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
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