采用普通回弹仪和高强回弹仪检测混凝土抗压强度的误差比较  

Comparison of Error for Concrete Compressive Strength Calculated by Ordinary and High-Strength Rebound Hammer

作　　者：韦志 王震 郭清春[2] 贺庆烨 党玉栋[2] 林帆 WEI Zhi;WANG Zhen;GUO Qingchun;HE Qingye;DANG Yudong;LIN Fan(Yunnan Construction Engineering Quality Inspection Station Co.,Ltd.,Kunming Yunnan 650223,China;Yunnan Provincial Key Laboratory of Building Structure and New Materials,Yunnan Institute of Building Research Co.,Ltd.,Kunming Yunnan 650223,China;School of Architecture and Planning,Yunnan University,Kunming Yunnan 650500,China)

机构地区：[1]云南建筑工程质量检验站有限公司,云南昆明650223 [2]云南省建筑科学研究院有限公司云南省建筑结构与新材料企业重点实验室,云南昆明650223 [3]云南大学建筑与规划学院,云南昆明650500

出　　处：《工程质量》2023年第10期45-48,53,共5页Construction Quality

基　　金：云南省交通运输厅科技计划项目(云交科教便[2021]12号);云南省基础研究青年基金项目(2019FD023)。

摘　　要：对公路工程C30~C55混凝土用普通回弹仪和高强回弹仪进行回弹测试,对回弹值数据、碳化深度值及抗压强度值回归拟合,分别建立回弹测强曲线,通过比较回弹曲线的平均相对误差与平均相对标准差,揭示不同回弹仪建立的回弹测强曲线的误差。结果表明,用普通或高强回弹仪得到的回弹测强曲线相对误差和标准差均可满足相关标准中对专用曲线或地方曲线的误差要求,相比之下,由普通回弹仪得到的测强曲线用于推定实际强度大于50 MPa的混凝土时、或用高强回弹仪得到的测强曲线用于推定实际强度低于40 MPa的混凝土时,误差均相对较大。The current work compared the mean relative error and mean relative standard deviation for C30~C50 concrete compressive strength calculated by the regression curve fitted by the rebound value data(tested by ordinary and high-strength rebound hammer),carbonation depth and compressive strength value.The results shown that the relative error and standard deviation of the regression curve obtained by the ordinary or high-strength rebound hammer can meet the error requirements of the special curve or local curve in the relevant standards.The error is relatively large when using the strength measurement curve obtained with the ordinary rebound hammer to calculate the actual strength are greater than 50MPa,or using the strength measurement curve obtained with the high-strength rebound hammer to calculate the actual strength are lower than 40MPa.

关 键 词：无损检测 回弹仪 测强曲线 检测精度 

分 类 号：TU528[建筑科学—建筑技术科学]