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2025 02 v.46 9-17
纤维素纳米晶须增强ECC的抗硫酸盐腐蚀性能及机理分析
基金项目(Foundation): 山东省自然科学基金(ZR2021ME110)
邮箱(Email): md1101@163.com;
DOI:
中文作者单位:

青岛理工大学基本建设处;青岛农业大学建筑工程学院;中山大学土木工程学院;

摘要(Abstract):

工程水泥基复合材料(ECC)可以有效缓解水泥基体的开裂,但高的水泥用量使其具有明显的自收缩,这损坏了ECC的力学性能和耐久性能。使用纤维素纳米晶须(CNC)来增强ECC力学性能和抗硫酸盐腐蚀性能。结果表明:CNC会提升ECC的应变率和抗压强度,并增加其抗硫酸盐腐蚀性能。CNC促进了水泥水化,它的掺入还会强化聚乙烯(PE)纤维和水泥基体的界面黏结,增强PE纤维的桥联效果,促进ECC的多点开裂。分子动力学模拟分析了CNC对ECC抗硫酸盐腐蚀性能的增强机制。结果表明:CNC主要通过Ca—O配位与氢键和C-S-H发生吸附,覆盖到C-S-H表面,形成保护层,限制SO_42-侵入到C-S-H内部并减少SO_42-和C-S-H的配位数量。

关键词(KeyWords): 工程水泥基复合材料;纤维素纳米晶须;分子动力学模拟;界面
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基本信息:

DOI:

中图分类号:TU528.572

引用信息:

[1]吴涛,孟丹,樊其昌.纤维素纳米晶须增强ECC的抗硫酸盐腐蚀性能及机理分析[J].青岛理工大学学报,2025,46(02):9-17.

基金信息:

山东省自然科学基金(ZR2021ME110)

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