Experimental study on durability of basalt fiber concrete after elevated temperature
Experimental study on durability of basalt fiber concrete after elevated temperature
复制标题
玄武岩纤维混凝土高温耐久性能试验研究
DOI：
10.1002/suco.202000746
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发表时间：
2021-10-26
影响因子：
3.2
通讯作者：
Doh, Jeung-Hwan
中科院分区：
文献类型：
--
作者：
Lu, Limin;Han, Fei;Doh, Jeung-Hwan
暴露于高温后混凝土材料的耐久性对于火灾场景中混凝土结构的可用性预测非常重要。现有研究表明，适量的玄武岩纤维可以显着提高混凝土的劈裂抗拉强度和抗氯离子渗透能力。然而，玄武岩纤维混凝土高温后的力学性能及其耐久性能仍不清楚。本文对普通混凝土和玄武岩纤维混凝土在高温下的力学性能、碳化规律、氯离子渗透规律进行了研究。提出了高温混凝土烧成层的概念，并测量了不同温度下混凝土烧成层的厚度。结果表明，玄武岩纤维的加入可以抑制混凝土在高温下的碳化，减小烧焦层厚度，显着提高混凝土的抗氯离子渗透能力。
The durability of concrete material after exposure to elevated temperatures is important for the serviceability prediction of concrete structures in a fire disaster scenario. Existing researches show that an appropriate amount of basalt fiber can significantly improve the splitting tensile strength and chloride penetration resistance of concrete. However, the mechanical properties of basalt fiber concrete after elevated temperatures and its durability properties are still not clear. In this paper, the mechanical properties, carbonization law, and chloride ion penetration law of ordinary concrete and basalt fiber concrete under high temperatures are studied. The concept of a burnt layer for concrete exposed to elevated temperatures is proposed, and the thickness of this burnt layer for concrete under different temperatures was measured. The results show that the addition of basalt fiber can inhibit the carbonization of concrete at elevated temperatures, diminish the thickness of the burnt layer, and significantly improve the chloride penetration resistance of concrete.