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Resistance of hydrophobic concrete with different moisture contents to advanced freeze–thaw cycles
Structural Concrete ( IF 3.2 ) Pub Date : 2020-10-02 , DOI: 10.1002/suco.202000214
Mazen J. Al‐Kheetan 1 , Mu'ath Al‐Tarawneh 1 , Seyed Hamidreza Ghaffar 2 , Mehdi Chougan 2 , Yazeed S. Jweihan 1 , Mujib M. Rahman 2
Affiliation  

This article is aimed at investigating the long‐term performance of three original hydrophobic materials, namely, sodium acetate, fluoropolymer, and silicone resin. Their performance was compared with traditional silane when applied to fully dry concrete, fully saturated concrete, and concrete with 2 and 4% moisture content. A recently developed freeze–thaw process, which is based on temperature and humidity variations, was employed in this study to assess the durability of applied materials. The outcomes of the adopted freeze–thaw system were compared with the results obtained from running a conventional freeze–thaw test. Mass change, water absorption, and microcracks development of treated concrete were investigated and compared with untreated concrete after completing 6 months of freeze–thaw cycles. Results confirmed the high affinity of the proposed materials to moisture at application time compared with silane. Additionally, it was demonstrated that moisture content has a critical impact on the bonding between applied materials and concrete, hence their efficacy in enhancing the durability of concrete.

中文翻译:

不同水分含量的疏水混凝土对高级冻融循环的抵抗力

本文旨在研究三种原始疏水材料(醋酸钠,含氟聚合物和有机硅树脂)的长期性能。当将它们用于完全干燥的混凝土,完全饱和的混凝土以及含水量为2%和4%的混凝土时,它们的性能可以与传统的硅烷进行比较。本研究采用了一种基于温度和湿度变化的最新开发的冻融工艺,以评估所用材料的耐久性。将采用的冻融系统的结果与运行常规冻融测试获得的结果进行比较。在完成6个月的冻融循环后,对已处理的混凝土的质量变化,吸水率和微裂纹发展进行了研究,并将其与未处理的混凝土进行了比较。结果证实了与硅烷相比,所建议的材料在施工时对水分的亲和力高。另外,证明了水分含量对所施加的材料和混凝土之间的粘结具有关键影响,因此其在增强混凝土的耐久性方面的功效。
更新日期:2020-10-02
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