不同回弹标准在云南高速公路C50T 梁上的试验  

Experiments of different rebound detection standards on C50T beam of Yunnan highway

作　　者：黄文君[1] 贺昶 王震 古源 HUANG Wenjun;HE Chang;WANG Zhen;GU Yuan(Yunnan Provincial Key Laboratory of Building Structures and New Materials,Yunnan Academy of Building Science Co.,Ltd.,Kunming 650500,China;College of Materials Science and Engineering,Chongqing University,Chongqing 400030,China;Yunnan Construction Engineering Quality Inspection Co.,Ltd.,Kunming 650500,China)

机构地区：[1]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重点实验室,昆明650500 [2]重庆大学材料科学与工程学院,重庆400030 [3]云南建筑工程质量检验站有限公司,昆明650500

出　　处：《无损检测》2025年第4期22-26,共5页Nondestructive Testing

基　　金：云南省科技厅社会发展专项(202303AC100005,202303AC100015);技术创新人才培养对象项目黄文君(202005AD160003);云南省产业创新人才专项(yfgrc202428)。

摘　　要：针对高速公路C50T梁的回弹检测,通过JGJ/T23及相关标准的选择分析比较,采用不同回弹仪、不同标准对云南省某高速公路T梁混凝土现场工程进行验证和试验,得出以下结论:选择不同的回弹检测标准,会对C50T梁混凝土检测结果产生较大影响(强度推定差值15 MPa以上);回弹仪在规定测试范围内时,差异更多来自于曲线的选择;建议现场对JGJ/T23、JGJ/T294以及当地的地方标准进行试验验证比较,有必要时建立专用曲线,以提高回弹法检测现场混凝土强度的准确性。In view of rebound detection of C50T beam on highway,through the selection and analysis of JGJ/T23 and related standards,different resilience instruments and different standards were used to verify and test the concrete field engineering of a highway T-beam in Yunnan province,and the following conclusions were drawn:The selection of different resilience testing standards had a great impact on the test results of C50T beam concrete(the presumed strength difference is more than 15 MPa);The rebound instrument was within the specified test range,and the difference was more from the choice of curves;It was suggested that JGJ/T23,JGJ/T294 and local standards should be tested and compared on site,and special curves should be established if necessary,so as to improve the accuracy of in-situ concrete strength detection by rebound method.

关 键 词：回弹仪 回弹标准 高速公路 C50T梁 

分 类 号：TU375.1[建筑科学—结构工程] TG115.28[金属学及工艺—物理冶金]