用于OPC混凝土防火的活性渣涂层
Andrius Kielė1, Danutė Vaičiukynienė1, Šarūnas Bertašius1
1Faculty of Civil Engineering and Architecture, Kaunas University of Technology, Studentu St. 48, LT-51367 Kaunas, Lithuania.
Materials (Basel, Switzerland)
|December 9, 2023
概括
使用活性废渣和石膏的耐火涂层保护普通波特兰水泥 (OPC) 混凝土. 这些涂料增强了剩余的压力强度,并提高了玻璃纤维增强聚合物 (FRP) 混凝土结构中暴露在高温下的粘合强度.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 消防安全工程 消防安全工程
背景情况:
- 普通的波特兰水泥 (OPC) 混凝土在接触火灾时会失去机械完整性.
- 为混凝土结构制定有效的耐火保护措施至关重要.
研究的目的:
- 为了研究含活性废渣涂层的有效性,将合金作为OPC混凝土的耐火应用.
- 评估这些涂层对混凝土和FRP钢筋的剩余压力强度和粘合强度的影响.
主要方法:
- 对10毫米厚的样本施加了五种不同成分的活性废渣涂层,含有不同含量 (1-10%).
- 在暴露于热量后,对涂层和未涂层OPC混凝土样本进行了残余压力强度测试.
- 在嵌入涂层和未涂层混凝土样品中的玻璃纤维增强聚合物 (FRP) 条上进行了拉出测试,以评估高温下的结合强度.
主要成果:
- 与未涂层样本 (32.37 MPa) 相比,涂层OPC混凝土样本的残余压力强度 (33.2-47.3 MPa) 较高.
- 在高温暴露后,涂层样品的混凝土和玻璃FRP条之间的粘附强度比未涂层样品 (6.56 MPa) 高43.9% (9.44 MPa).
结论:
- 含有3%石膏的活性废渣涂层显示出显著的耐火性能.
- 这些涂层有效地保护普通波特兰水泥混凝土和FRP钢筋混凝土结构免受火灾损坏,保持机械完整性和粘合强度.
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