（1 石家庄经济学院勘查技术与工程学院， 石家庄 050031； 2 河北省水资源可持续利用与开发重点实验室， 石家庄 050031；3 中铁隧道勘测设计院有限公司， 天津 300133）

［摘要］为了研究掺合矿物质混凝土梁被不同浓度的硫酸盐溶液浸泡后的正截面受弯承载力，对6根钢筋混凝土简支梁进行了四点加载试验，分析梁承载力随硫酸盐溶液浓度的变化规律。结果表明：掺合的矿物质能够有效改善普通混凝土的抗硫酸侵蚀性能；梁试件正截面受弯承载力随硫酸盐溶液浓度的增加而减小；硫酸盐溶液的浓度越大，掺合矿物质混凝土梁的正截面受弯承载力增加越明显。在试验的基础上提出了考虑掺合矿物质和硫酸盐浓度的混凝土梁正截面受弯承载力计算公式，计算值与试验值符合较好。

［关键词］粉煤灰; 矿渣; 硫酸盐溶液; 钢筋混凝土梁; 正截面受弯承载力

中图分类号：TU375.1, U457+.5    文献标识码：A    文章编号：1002-848X(2015)04-0081-04

Experimental study on normal section flexural strength of sulfate corroded concrete beams

Jia Lei1，2, Xie Yongping1, Li Shenkui3

 (1 School of Exploration Technology and Engineering, Shijiazhuang University of Economics, Shijiazhuang 050031, China;2 Hebei Province Key Laboratory of Sustained Development and Utilization of Water Resources, Shijiazhuang 050031, China;3 China Railway Tunnel Survey & Design Institute Co., Ltd., Tianjin 300133, China)

Abstract:

Six reinforced concrete simply\|supported beams subjected to the four point loading were tested to investigate the normal section flexural strength of reinforced concrete beams with different concentration of sulfate solution. The change law of beam flexural strength along with the concentration of sulfate solution was analyzed. The analysis results show that the concrete by blending minerals can effectively improve the erosion performance of sulfate solution. The normal section flexural strength decreases as the concentration of sulfate solution increases. The larger the concentration of sulfate solution is, the more the normal section flexural strength reinforced concrete beam by blending minerals is improved. On the basis of experiment, a practical calculation formula of normal section flexural strength of reinforced concrete beam considering blending minerals and concentration of sulfate solution was proposed, and the calculation values are consistent with experimental results.

Keywords:coal ash; slag; sulfate solution; reinforced concrete beam;  normal section flexural strength

*国家青年科学基金项目(51408378)。

作者简介：贾磊, 博士研究生, 副教授，Email:jiali1978@126.com。

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