氯盐环境下超高性能混凝土性能研究  

Study on the Performance of Ultra-High Performance Concrete in Chloride Salt Environment

作　　者：牛龙龙[1] 李海峰 张士萍[1] 章艳 Niu Longlong;Li Haifeng;Zhang Shiping

机构地区：[1]南京工程学院建筑工程学院,江苏南京211167 [2]上建广亚工程材料有限公司,江苏常州213000

出　　处：《江苏建材》2025年第1期40-41,共2页Jiangsu Building Materials

基　　金：国家自然科学基金项目(52078247)。

摘　　要：为研究氯盐环境下超高性能混凝土性能,将超高性能混凝土(UPHC)放置在60℃、3.5%NaCl溶液中长期养护,观察其试件表面形貌与锈蚀情况、氯离子扩散深度以及力学性能变化。研究结果表明:氯盐环境下UHPC试件中钢纤维锈蚀仅发生在试件表面,表面锈蚀斑点对试件基体没有造成破坏,养护400 d后氯离子在UHPC试件中的扩散深度仅有8 mm,长期在NaCl溶液养护的UHPC试件抗压强度略有提高,而其抗折强度逐渐降低。In order to study the performance of ultra-high performance concrete(UHPC),UHPC exposed to 3.5%NaCl solution in long-term under the temperature of 60℃.The results show that the corrosion of steel fibers in UHPC was only on the surface,and there was no degradation of concrete after being exposed to chloride ion solutions.After 400 days of curing,the diffusion depth of chloride ions in UHPC is only 8 mm.The compressive strength of UHPC has slightly increased,and the flexural strength gradually decreases.

关 键 词：氯盐 超高性能混凝土 钢纤维 锈蚀 

分 类 号：TU502.6[建筑科学—建筑技术科学]