Nano-scale delving of temperature effect on interfacial adhesion of nano-rubber coated cement paste under harsh environment

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Developments in the Built Environment Pub Date : 2024-04-01 DOI:10.1016/j.dibe.2024.100426

Xiao-Dong Zhu, Ali Zaoui, W. Sekkal

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Abstract

Interfacial adhesion between surface coating and cement paste under aggressive environment is the most key properties that responsible the effectiveness of coating on cement paste. The present work is dedicated to an in-depth investigation concerning the temperature influence on the interfacial adhesion degradation between rubber nano-coating and Calcium-Silicate-Hydrate (CSH) paste under harsh environments. Results indicate that a well-distributed fully rubber nano-coating on CSH maintains its impermeability within temperature range of 260–373K for pure water molecules and up to 420K for salty water solution. However, the nano-coated structure loses its impermeability at 380K and 440K in pure water and salty water solution, respectively. The interfacial adhesion between rubber and CSH surface decreases with increasing temperature under both conditions. In addition, the effectiveness of the rubber nano-coating surface weakens due to temperature rising inducing the breaking of the hardest interfacial interatomic cao-c = bonds in both conditions.

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纳米尺度研究恶劣环境下温度对纳米橡胶涂层水泥浆界面粘附力的影响

在侵蚀性环境下，表面涂层与水泥浆之间的界面附着力是决定涂层在水泥浆上效果的最关键特性。本研究致力于深入探讨在恶劣环境下，温度对纳米橡胶涂层与硅酸钙-水合物（CSH）浆料之间界面附着力降解的影响。结果表明，CSH 上分布均匀的全橡胶纳米涂层在 260-373K 的温度范围内对纯水分子保持不渗透性，在 420K 的温度范围内对含盐水溶液保持不渗透性。然而，在纯水溶液和含盐水溶液中，纳米涂层结构分别在 380K 和 440K 时失去抗渗性。在这两种条件下，橡胶与 CSH 表面之间的界面粘附力都会随着温度的升高而降低。此外，在这两种条件下，橡胶纳米涂层表面的功效会因温度升高而减弱，导致最坚硬的界面原子间 cao-c = 键断裂。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.