(1 西安理工大学土木建筑工程学院， 西安 710048；2 陕西中轻轻工业工程院有限公司， 西安 710048)

［摘要］为研究玄武岩纤维掺量对混凝土耐久性能的影响规律，将分别含有0%，0.05%，0.1%，0.2%，0.3%的纤维掺量混凝土试块（100mm×100mm×100mm）置于pH=3的硫酸溶液中进行腐蚀试验。对各掺量混凝土试块的腐蚀发展情况追踪观察，分析了腐蚀环境中玄武岩纤维混凝土孔隙率及离子浓度的变化规律；同时，对侵蚀后玄武岩混凝土的抗压强度进行了试验研究。试验结果表明：加入0.1%纤维的混凝土耐酸腐蚀性能得到了较大提升，与普通混凝土相比，抗压强度提高40%以上；但过量掺入纤维，反而起到不利作用。

［关键词］玄武岩纤维； 耐久性； 硫酸腐蚀； 力学性能； 抗压强度

中图分类号：TU375文献标识码：A文章编号：1002-848X(2020)15-0091-05

Research on influence of basalt fiber addition on concrete durability under sulfuric acid environment

WANG Zhenshan1, XING Lixin1, WU Bo2, LIU Yun1, TIAN Jianbo1

(1 School of Civil Engineering and Architecture, Xi′an University of Technology, Xi′an 710048, China;2 China Light Industry Shaanxi Engineering Co.， Ltd., Xi′an 710048, China)

Abstract:In order to study the influence of basalt fiber addition on durability of concrete, the concrete test block (100mm×100mm×100mm) containing 0%, 0.05%, 0.1%, 0.2%, 0.3% basalt fiber, was respectively put in sulfuric acid solution of pH=3 for immersion corrosion test. The corrosion development of concrete samples with different amount of basalt fiber was followed up and observed, the variation law of porosity and ion concentration of basalt fiber reinforced concrete in corrosion environments were analyzed, and the compressive strength of basalt fiber reinforced concrete after erosion was studied by experiment at the same time. The results of the tests indicate: the acid corrosion resistance of concrete with 0.1% fiber is greatly improved, compared with common concrete, the compressive strength is increased more than 40%, but mixing excessive fiber has adverse effects.

Keywords:basalt fiber; durability; sulfuric acid corrosion; mechanical property; compressive strength

*国家自然科学基金 (51608441)，陕西省自然科学基础研究计划（青年人才项目）（2017JQ5032），中国博士后科学基金面上资助项目（2017M613174）， 陕西省住房和城乡建设厅建设科技计划项目（2016-K91）。

作者简介：王振山，博士，副教授， Email：wangdayuwang@126.com。