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对普通混凝土、玻璃纤维增强混凝土、玄武岩纤维增强混凝土在碳化环境下进行了氯离子渗透试验。对比分析了不同碳化周期,3组混凝土碳化深度以及孔隙度的变化,进一步研究了碳化周期与纤维的掺入对混凝土抗氯离子侵蚀性能的影响,并通过扫描电镜观察了其微观结构。结果分析表明:掺入玻璃纤维和玄武岩纤维提高了混凝土的抗碳化性能,并且玄武岩纤维增强混凝土的抗碳化性能不受碳化周期的影响;碳化反应提高了混凝土抗氯离子渗透性能;碳化过程中纤维的掺入改善了混凝土的孔径分布,玻璃纤维与玄武岩纤维都能够提高混凝土的抗氯离子渗透性能;纤维使得混凝土微观结构更加致密。
Chloride penetration tests were carried out on ordinary concrete, glass fiber reinforced concrete and basalt fiber reinforced concrete in a carbonized environment. The effects of carbonation cycle and fiber incorporation on the corrosion resistance of concrete were also studied. The microstructure of the concrete was also observed by scanning electron microscopy. The results show that the incorporation of glass fiber and basalt fiber improves the carbonation resistance of concrete, and the carbonation resistance of basalt fiber reinforced concrete is not affected by the carbonization cycle. The carbonation reaction improves the resistance of concrete to chloride ion penetration. In the carbonization process, Can improve the concrete pore size distribution. Both glass fiber and basalt fiber can improve the resistance of concrete to chloride ion penetration. The fiber makes the microstructure of concrete more compact.