基于回弹法的预制构件混凝土专用测强曲线研究  

Study on specialized strength measurement curve for prefabricated component concrete based on rebound method

作　　者：罗启灵[1,2,3] 汤高翔 龙武剑 韩露[4] 林海鹏 LUO Qiling;TANG Gaoxiang;LONG Wujian;HAN Lu;LIN Haipeng(College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China;State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,Shenzhen 518060,China;Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering(SZU)Civil Engineering Durability,Shenzhen 518060,China;Yau Lee Wah Building Industrialization Technologies(Shenzhen)Company Limited,Shenzhen 518000,China)

机构地区：[1]深圳大学土木与交通工程学院,广东深圳518060 [2]深地工程智能建造与健康运维全国重点实验室,广东深圳518060 [3]广东省滨海土木工程耐久性重点实验室,广东深圳518060 [4]有利华建筑产业化科技(深圳)有限公司,广东深圳518000

出　　处：《混凝土与水泥制品》2025年第3期77-80,85,共5页China Concrete and Cement Products

基　　金：深圳市基础研究项目(面上项目)(JCYJ20230808105109018);广东省自然科学基金面上项目(2023A1515012136)。

摘　　要：设计制作了强度等级为C20、C30、C40、C50的预制构件混凝土试块,测试了试块混凝土的7、14、28、60 d回弹强度和抗压强度,采用幂函数形式的回归模型建立了预制构件混凝土专用测强曲线方程,并计算了平均相对误差和相对标准差。结果表明:建立的专用测强曲线回归方程为f_(cu,i)^(c)=1.7731R_(m)^(0.8651),其平均相对误差为±0.3%,相对标准差为0.5%,满足相关规范要求,且适用于回弹法检测龄期为7 d的预制构件混凝土抗压强度预测。Prefabricated component concrete test blocks with strength grades of C20,C30,C40,and C50 were designed and manufactured.The rebound strength and compressive strength of the test blocks at 7 d,14 d,28 d,and 60 d were measured.A power function regression model was employed to develop a specialized strength measurement curve for prefabricated component concrete,and the average relative error and relative standard deviation were calculated.The results indicate that the regression equation for the established special strength measurement curve is f_(cu,i)^(c)=1.7731R_(m)^(0.8651),with an average relative error of±0.3%,and a relative standard deviation of 0.5%.These findings meet the requirements of relevant specifications and are suitable for predicting the compressive strength of prefabricated component concrete using a rebound method for testing age of 7 days.

关 键 词：预制构件混凝土 回弹法 测强曲线 抗压强度 回归模型 

分 类 号：TU528.0[建筑科学—建筑技术科学]