(1廊坊市建设工程质量检测中心, 廊坊 065000；2 廊坊市阳光建设工程质量检测有限公司, 廊坊 065000)

［摘要］对直径为44mm的微小芯样进行抗弯折试验以及相应龄期的立方体试件力学性能测试，获得了微小芯样名义抗折强度和立方体试件抗压强度。结果表明:微小芯样名义抗折强度与混凝土立方体试件抗压强度存在显著的相关性，建立的幂函数抗折法测强曲线具有足够的工程检测精度；对国内外混凝土抗折强度换算公式进行了比较与分析,研究结果可供工程质量检测与控制参考。

［关键词］混凝土； 微小芯样； 抗折强度； 测强曲线

中图分类号：TU528文献标识码：A文章编号：1002-848X(2019)04-0082-04

Technical study for inspection of concrete compressive strength by micro-core sample bending method

Wang Dayong1,2

(1 Langfang Construction Engineering Quality Testing Center, Langfang 065000, China;2 Langfang Yangguang Construction Engineering Quality Supervision Co., Ltd., Langfang 065000, China）

Abstract:The bending test was conducted on micro-core sample with a diameter of 44mm, and mechanical property test was conducted on cubic specimens with relevant ages, to obtain the nominal bending strength of micro-core sample and the compressive strength of cubic specimens. The results show that there is a significant correlation between the nominal bending strength of micro-core sample and the compressive strength of concrete cube specimens, and the established power function bending strength curve has sufficient engineering detection accuracy. The conversion formulas of concrete bending strength at home and abroad were compared and analyzed, and the results can be used as reference for engineering quality detection and control.

Keywords:concrete; micro-core sample; bending strength; strength curve

作者简介：王大勇,学士,教授级高级工程师,一级建造师,Email:wangdayong2008@163.com。