摘要
为了探究养护条件、浸润剂类型和体积掺量对玄武岩纤维混凝土力学性能的影响,本文通过试验研究2种养护环境(包括标准养护和低温养护)下4种不同浸润剂对短切玄武岩纤维体积掺量以及玄武岩纤维混凝土物理力学性能的影响,确定玄武岩纤维的最佳浸润剂类型和最佳掺量,最后通过CT测试分析不同浸润剂玄武岩纤维混凝土中孔结构参数的规律,验证了不同浸润剂玄武岩纤维混凝土宏观力学性能与微观孔结构间的关系。结果表明:①低温环境和浸润剂类型均会影响玄武岩纤维混凝土的力学性能,但浸润剂类型对于玄武岩纤维混凝土力学性能影响更为显著;②浸润剂类型会影响玄武岩纤维在混凝土中的最佳掺量;说明优化玄武岩纤维短切丝浸润剂界面对于提高玄武岩纤维混凝土力学性能的重要性;③掺入浸润剂的玄武岩纤维可以提高混凝土的抗硫酸盐侵蚀能力,掺入不同浸润剂的玄武岩纤维对混凝土的抗硫酸盐侵蚀改善效果不同;④掺加玄武岩纤维后对于混凝土内部的孔隙结构影响较大,而不同浸润剂类型纤维对于试件的孔隙结构参数的影响差异也较为明显。
In order to explore the effects of curing conditions,sizing agent type and volume content on the mechanical properties of basalt fiber reinforced concrete,the effects of 4 different sizing agents on the volume of chopped basalt fiber and physical and mechanical properties of basalt fiber reinforced concrete under 2 different curing environments(standard curing and low temperature curing)is studied in this paper.The law of the mesopore structure parameters of basalt fiber reinforced concrete with different sizing agents is analyzed by CT test,and the relationship between the macro mechanical properties and the micro pore structure of basalt fiber reinforced concrete with different sizing agents is verified.The results show:Both the low temperature environment and the type of sizing agent will affect the mechanical properties of basalt fiber reinforced concrete,but the type of sizing agent has a more significant effect on the mechanical properties of basalt fiber reinforced concrete.②The type of sizing agent affects the optimum amount of basalt fibers in concrete.It shows the importance of optimizing the interface of basalt fiber chopped sizing agent to improve the mechanical properties of basalt fiber concrete.③Sizing agent basalt fiber can improve the sulfate corrosion resistance of concrete.And different types of sizing agent basalt fiber have different improvement effects on the sulfate corrosion resistance of concrete.@The addition of basalt fibers has a great influence on the pore structure inside the concrete,and the influence of different sizing fibers on the pore structure parameters of the specimen is also obvious.
作者
李贺龙
曹海明
马宏亮
高凤琴
许雪峰
崔圣爱
Li Helong;Cao Haiming;Ma Hongliang;Gao Fengqin;Xu Xuefeng;Cui Shengai(China Nuclear Industry Huachen Construction Engineering Co.Ltd,Xi'an 712000,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu610031,China)
出处
《建筑科学》
CSCD
北大核心
2024年第9期21-31,共11页
Building Science
基金
国家自然科学基金“寒区隧道渗流水环境喷射混凝土-岩石界面未冻水迁移、冻融损伤机制及性能提升研究”(52278277)。
