用GO添加剂在水泥材料中的运输性能的多尺度建模
Bing Liu1, Weichen Kang2, Weixing Lian2
1School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen 518172, China.
Nanomaterials (Basel, Switzerland)
|February 13, 2025
概括
添加氧化石墨烯 (GO) 通过改善微观结构和减少危险离子传输,提高了混凝土的耐用性. 这项研究模拟了GO的模型.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 纳米技术 纳米技术
背景情况:
- 沿海地区的混凝土裂促进了离子的进入,加速了恶化.
- 通过混凝土的危险离子传输损害了结构完整性和耐用性.
- 石墨烯氧化物 (GO) 显示出改善混凝土微观结构和抵抗离子传输的潜力.
研究的目的:
- 开发和利用一个多尺度的运输模型,用石墨烯氧化物 (GO) 添加剂的水泥材料.
- 为了预测GO改性混凝土对危险离子入的增强抵抗力.
- 研究GO对混凝土水化,微观结构和离子传输特性的影响.
主要方法:
- 建立了一种多尺度的运输模型,用于混凝土材料和GO添加剂.
- 确定水化类型和动力学以告知微观结构建模.
- 在亚微,微和中等尺度上进行微结构建模,包括ITZ效应.
- 根据开发的微观结构模型进行运输属性模拟.
主要成果:
- 石墨烯氧化物 (GO) 缩短了诱导期,加速了水合的发展.
- 在所有尺度和年龄范围内,GO的结合降低了多孔性.
- 在微尺度上,GO在水泥矩阵和ITZ中提炼了孔隙结构.
- GO增加了扩散曲率,抑制了离子运输,并增强了对危险离子的抵抗力.
结论:
- 石墨烯氧化物 (GO) 显著提高了水泥材料对危险离子传输的抵抗力.
- 多尺度建模方法有效预测了由于GO添加剂的性能提升.
- 由于GO能够改进微观结构并增加扩散曲率,因此它为在侵袭性环境中的耐用混凝土提供了可行的策略.
相关概念视频
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01:22Types of Cement II
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