关于玄武岩纤维混凝土的增强机理研究  

Study on the reinforcement mechanism of basalt fiber concrete enhancement mechanism

作　　者：侯敏[1] 陶燕[1] 陶忠[1] 柴栋[1] HOU Min;TAO Yan;TAO Zhong;CHAI Dong(Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学,云南昆明650500

出　　处：《混凝土》2020年第2期67-71,75,共6页Concrete

基　　金：国家科技支撑计划项目(2013BAK13B01);国家科技支撑计划课题(2014BAL06B03)。

摘　　要：为探究短切玄武岩纤维对混凝土基本力学性能的影响机制,分析出短切玄武岩纤维对混凝土的增强机理。以C35普通混凝土为研究对象,短切玄武岩纤维长度和掺量为变量,通过静态力学性能试验将玄武岩纤维混凝土与素纤维混凝土的基本力学性能进行对比分析。并通过光学显微镜对玄武岩纤维混凝土的微观结构进行观察与分析,找出在混凝土中掺加玄武岩纤维的最佳纤维长度区间与最佳的纤维掺量区间。掺入玄武岩纤维后,抗压强度普遍降低,最高降低幅度达8.4%。劈拉强度和抗折强度明显提高,劈拉强度最大可提高23.8%。抗折强度最大可提高34.7%。光学显微镜下,玄武岩纤维分散均匀。在混凝土基体材料中呈各向异性,呈现出良好的密闭空间网状结构。In order to explore the influence mechanism of chopped basalt fiber on the basic mechanical properties of concrete,analyzes the reinforcing mechanism of chopped basalt fiber on concrete.Taking C35 ordinary concrete as the research object,the length and amount of chopped basalt fiber are variables,and the basic mechanical properties of basalt fiber concrete and plain fiber concrete are compared and analyzed by static mechanical properties test.The microstructure of basalt fiber reinforced concrete was observed and analyzed by optical microscope.The optimum fiber length interval and the optimal fiber content range of basalt fiber in concrete were found.The test results show that the compressive strength is generally reduced after the incorporation of basalt fiber,and the maximum reduction is 8.4%.The tensile strength and flexural strength are significantly improved,and the tensile strength can be increased by 23.8%.The flexural strength can be increased by up to 34.7%.Under the optical microscope,the basalt fibers are evenly dispersed.It is anisotropic in the concrete matrix material and exhibits a good closed space network structure.

关 键 词：玄武岩纤维混凝土 力学性能 试验 

分 类 号：TU528.572[建筑科学—建筑技术科学]