(1西安理工大学土木建筑工程学院， 西安 710048；  2 陕西建工集团有限公司， 西安 710003)

［摘要］将玄武岩纤维掺量分别为0%，0.05%，0.1%，0.2%，0.30%、尺寸为100mm×100mm×100mm的混凝土试块置于硫酸钠溶液中，研究硫酸钠侵蚀下玄武岩纤维掺量对混凝土耐久性的影响规律，并且每个月追踪观测裂纹的发展状况并测定吸水率的变化； 在第90d时，测定硫酸根离子的分布情况，并对混凝土试块进行抗压试验。研究结果表明：适量掺入玄武岩纤维对混凝土的早期抗裂性能有明显的改善，使硫酸根离子的渗透量降低，在一定程度上提高了混凝土在硫酸钠溶液中的耐久性，玄武岩纤维掺量过量则会降低混凝土耐腐蚀性和抗压强度，试验表明，玄武岩纤维掺量为0.1%的混凝土试块的耐腐蚀性能和抗压强度最好。

［关键词］玄武岩纤维混凝土； 硫酸钠腐蚀； 抗裂性能； 耐久性； 抗压强度

中图分类号：TU528文献标识码：A文章编号：1002-848X(2020)20-0118-06

Experimental study on corrosion resistance and mechanical properties of basalt fiber concrete in sodium sulfate environment

WANG Zhenshan1, ZONG Mengyuan1, ZHAO Kai2, LI Zhe1, TIAN Jianbo1

(1 School of Civil and Architectural Engineering, Xi′an University of Technology, Xi′an 710048, China； 2 Shaanxi Construction Engineering Group Corporation Limited, Xi′an 710003, China)

Abstract:The concrete blocks with size of 100 mm × 100 mm × 100 mm with 0%, 0.05%, 0.1%, 0.2% and 0.3% of basalt fiber contents respectively were placed in sodium sulfate solution to study the influence of basalt fiber content on the durability of concrete under sodium sulfate corrosion, and the development of cracks was observed every month and the change of water absorption rate was measured. At the 90th day, the distribution of sulfate ion was measured, and the compressive test was carried out on the concrete block. The results show that: the appropriate amount of basalt fiber can significantly improve the early crack resistance of concrete, reduce the penetration of sulfate ion, and improve the durability of concrete in sodium sulfate solution to a certain extent. If the content of basalt fiber is excessive, the corrosion resistance and compressive strength of concrete will be reduced. The test results show that the concrete block with 0.1% basalt fiber has the best corrosion resistance and compressive strength.

Keywords:basalt fiber concrete; sodium sulfate corrosion; crack resistance; durability; 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。