混凝土碱性环境下玻璃纤维增强聚合物筋力学性能研究

STUDY ON THE MECHANICAL PROPERTIES OF GLASS FIBER REINFORCED POLYMER BARS IN THE SIMULATED BASIC ENVIRONMENT OF CONCRETE

通过模拟研究对碱性环境下玻璃纤维增强聚合物(GFRP)筋的力学性能试验。分析了不同温度、侵蚀条件对GFRP筋拉伸性能的影响。采用扫描电子显微镜(SEM)和X射线荧光光谱(XRF)的微观试验,分析腐蚀前后GFRP筋力学性能变化时对应的GFRP筋表面形貌、内部结构和化学组成的变化,从而揭示GFRP筋在碱性环境下的性能劣化机理。

In this paper,the mechanical properties of glass fiber reinforced polymer（GFRP） bars under simulated concrete basic environment were studied. The effects of different temperature and erosion conditions on the tensile properties of GFRP steel bars were analyzed. Scanning electron microscopy（SEM） and X-ray fluorescence（XRF）microscopic tests were used to analyzed the changes in surface morphology,composition and internal structure of GFRP bars corresponding to changes in mechanical performance of GFRP bars before and after corrosion,so as to reveal the performance degradation mechanism of GFRP bars in alkaline environment.