顶面原位二次回弹法检测混凝土抗压强度技术研究  

Technical Research on Concrete Compressive Strength Inspection by Double Rebounds Method on the Top Surface In-Situ

作　　者：魏志文 韩春雷 WEI Zhiwen;HAN Chunlei(Hebei Concrete Quality Testing Technology Innovation Center,Langfang Hebei 065000,China;Langfang Yangguang Construction Quality Test Co.,Ltd.,Langfang Hebei 065000,China)

机构地区：[1]河北省混凝土质量检测技术创新中心,河北廊坊065000 [2]廊坊市阳光建设工程质量检测有限公司,河北廊坊065000

出　　处：《工程质量》2021年第10期30-33,共4页Construction Quality

摘　　要：提出了一种原位二次回弹法检测混凝土抗压强度新技术。采用标称能量2.207 J回弹仪对硬化混凝土浇筑表面的同一测点进行原位二次回弹,由前后两次回弹值所拟合测强曲线推定混凝土抗压强度,并提出了回弹击实系数的参数概念,成功将其引入混凝土强度换算值计算。结果表明,论文所建立混凝土浇筑表面的原位二次回弹法拟合测强曲线具有足够检测精度,能用于对结构实体混凝土抗压强度推定。研究成果可供工程结构混凝土强度质量控制参考。This paper presents a new technology of in-situ secondary rebound method to detect the compressive strength of concrete.The nominal energy 2.207J rebound instrument is used to conduct in-situ secondary rebound on the same measuring point of hardened concrete pouring surface,and the compressive strength of concrete is inferred from the strength curve fitted by the two rebound values.The parameter concept of rebound compaction coefficient is proposed,which is successfully introduced into the calculation of concrete strength conversion value.The results show that the strength curve fitted by the in-situ secondary rebound method of concrete pouring surface established in this paper has enough detection accuracy,and can be used to estimate the compressive strength of structural solid concrete.The research results can provide reference for the quality control of structural concrete strength.

关 键 词：原位二次回弹法 混凝土 抗压强度 顶面 测强曲线 

分 类 号：TU528[建筑科学—建筑技术科学]