材料科学
硅烷
耐久性
纳米复合材料
复合材料
吸水率
盐(化学)
甲基丙烯酸甲酯
化学工程
聚合物
化学
共聚物
有机化学
工程类
作者
M. R. Sakr,M. T. Bassuoni
标识
DOI:10.1016/j.cemconcomp.2020.103841
摘要
This study aimed at investigating the efficiency of polymeric nanocomposites as superficial treatments for concrete subjected to aggravated exposures. Silane and methyl-methacrylate were used as base resins, in which nano-clay and nano-silica particles were mixed at different concentrations (0, 5, and 10%). The nanocomposites were applied to inferior and good quality [water-to-binder ratios of 0.60 and 0.40, respectively] concretes, and their effects on transport/barrier properties were evaluated in terms of penetrability and absorption/desorption percentages. Moreover, the durability of coated concrete was assessed under severe conditions: physical salt attack (PSA) and salt-frost scaling. The degradation mechanisms and coatings’ functionality were studied by mineralogical, thermal, and microstructural tests. Results showed that silane/nanocomposites were effective at enhancing the barrier properties of concrete, thus mitigating PSA and salt-frost scaling for sound and cracked concretes. Methyl-methacrylate/nanocomposites, especially at 5% dosage, were efficient at resisting PSA of concrete; but, they failed in the salt-frost scaling exposure.
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