钢纤维和化学侵蚀对地聚合物混凝土的疲劳寿命和耐久性影响分析  

Analysis of the Effect of Steel Fiber and Chemical Attack on the Fatigue Life and Durability of Geopolymer Concrete

作　　者：武云龙 WU Yunlong(China Railway 18th Bureau Group No.5 Engineering Co.,Ltd.,Tianjin 300459,China)

机构地区：[1]中铁十八局集团第五工程有限公司,天津300459

出　　处：《国防交通工程与技术》2025年第2期36-41,共6页Traffic Engineering and Technology for National Defence

摘　　要：研究分析了钢纤维掺量对地聚合物混凝土疲劳寿命的影响,并分析了在硫酸钠、氯化钠和氯化钙三种不同化学溶液中的干湿循环对其力学性能及耐久性的影响。研究结果表明:钢纤维的加入显著提升了地聚合物混凝土的疲劳寿命,钢纤维的饱和效应导致超过该掺量后疲劳寿命提升效果有限;氯化钙溶液对混凝土结构的破坏最为严重,相较于氯化钠和硫酸钠,其引起的抗压强度下降和质量损失更为显著;随着循环次数的增加,地聚物混凝土抗压强度和弹性模量均显著下降。本研究结果为地聚合物混凝土在恶劣环境下的应用提供了科学依据和改进策略。This study investigates the effect of steel fiber admixture on the fatigue life of geopolymer concrete and examines the impact of wet-dry cycling in three different chemical solutions:sodium sulphate,sodium chloride,and calcium chloride,on its mechanical property and durability.The results indicate that the addition of steel fiber significantly enhances the fatigue life of geopolymer concrete.However,due to the saturation effect of steel fiber,the improvement in fatigue life becomes limited beyond a certain dosage.Among the tested chemical solutions,calcium chloride caused the most severe damage to the concrete structure,leading to a more significant reduction in compressive strength and greater mass loss compared to sodium chloride and sodium sulfate.Additionally,as the number of wet-dry cycles increased,both compressive strength and elastic modulu of geopolymer concrete exhibited a marked decline.The findings of this study provide a scientific basis and strategies for improving the performance of geopolymer concrete in harsh environments.

关 键 词：地聚合物混凝土 疲劳寿命 化学侵蚀 干湿循环 

分 类 号：TU528[建筑科学—建筑技术科学]