The Chloride Ion Penetration Mechanism in Basalt Fiber Reinforced Concrete under Compression after Elevated Temperatures

The Chloride Ion Penetration Mechanism in Basalt Fiber Reinforced Concrete under Compression after Elevated Temperatures
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高温压缩玄武岩纤维混凝土中氯离子的渗透机理

DOI:
10.3390/app112110137
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发表时间:
2021-10
影响因子:
2.7
通讯作者:
Doh Jeung-Hwan
Doh Jeung-Hwan
中科院分区:
综合性期刊4区
文献类型:
--
作者:
Lu Limin;Wu Shaohua;Qin Yuwen;Yuan Guanglin;Zhao Qingli;Doh Jeung-Hwan

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氯离子渗透经常导致钢筋腐蚀,降低钢筋混凝土的耐久性。虽然以前的研究已经研究了一些纤维混凝土的氯离子渗透性,玄武岩纤维混凝土(BFRC)的氯离子渗透性还没有得到广泛的研究。考虑到BFRC可能会受到各种暴露环境的影响,本文重点探讨了高温和压缩耦合作用下BFRC的氯离子渗透性。结果表明,混凝土中氯离子含量随温度的升高而线性增加。在不同温度下,BFRC中的氯离子含量随温度的升高而变化较大。测定了氯离子渗透的压应力比阈值。提出了高温与机械损伤(加载试验)耦合作用下BFRC氯离子扩散系数的计算模型。
Chloride ion penetration frequently leads to steel corrosion and reduces the durability of reinforced concrete. Although previous studies have investigated the chloride ion permeability of some fiber concrete, the chloride ion permeability of the basalt fiber reinforced concrete (BFRC) has not been widely investigated. Considering that BFRC may be subjected to various exposure environments, this paper focused on exploring the chloride ion permeability of BFRC under the coupling effect of elevated temperatures and compression. Results demonstrated that the chloride ion content in concrete increased linearly with temperature. After exposure to different elevated temperatures, the chloride ion content in BFRC varied greatly with increasing stress. The compressive stress ratio threshold for the chloride ion penetration was measured. A calculation model of BFRC chloride ion diffusion coefficient under the coupling effect of elevated temperatures and mechanical damage (loading test) was proposed.
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