冲击波法无损检测火山石混凝土抗压强度  

Nondestructive Testing of Compressive Strength of Volcanic Rock Concrete by Impact Elastic Wave Method

作　　者：王震 毛雯婷[2] 李昕成[2] 党玉栋[2] 黄晓敏[3] WANG Zhen;MAO Wenting;LI Xincheng;DANG Yudong;HUANG Xiaomin(School of Architecture and Planning,Yunnan University,Kunming 650500,China;Yunnan Provincial Key Laboratory of Building Structure and New Materials,Yunnan Institute of Building Research Co.,Ltd.,Kunming 650223,China;Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]云南大学建筑与规划学院,云南昆明650500 [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]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《建筑材料学报》2023年第12期1328-1334,共7页Journal of Building Materials

基　　金：云南省交通运输厅科技创新及示范项目(云交科教便[2021]12号);云南省科技计划项目(202303AC100005)。

摘　　要：首次建立了冲击波-抗压强度、冲击波-回弹-抗压强度的测强曲线,对其推定的火山石混凝土抗压强度进行了验证,并与现行回弹法、超声回弹综合法测强曲线进行对比分析研究.结果表明:现行回弹法、超声回弹综合法推定火山石混凝土抗压强度的误差较大;冲击波法、冲击波-回弹综合法测强曲线更适用于火山石混凝土,且冲击波-回弹综合法测强曲线误差更低,平均相对误差和相对标准差分别为9.3%、11.3%,该曲线对小型构件钻芯验证结果的相对残差在±11%以内,残差在±6 MPa以内.The strength measurement curves of impact elastic wave compressive strength and impact elastic wave rebound compressive strength have been established for the first time,and estimated compressive strength of volcanic rock concrete was verified.A comparative analysis and research were conducted with the current rebound method and ultrasonic rebound comprehensive method strength measurement curves.The results show that the current rebound method and ultrasonic rebound comprehensive method have significant errors in estimating the compressive strength of volcanic rock concrete.The strength measurement curves of impact elastic wave method and impact elastic wave rebound comprehensive method are more suitable for volcanic rock concrete.The error of the impact elastic wave rebound comprehensive method strength measurement curve is lower,with the average relative error and relative standard deviation being 9.3%and 11.3%,respectively.The relative residual error of this curve for the verification results of small component core drilling is within±11%,and the residual error is within±6 MPa.

关 键 词：火山石混凝土 冲击波法 回弹值 超声波速 测强曲线 

分 类 号：TU528.01[建筑科学—建筑技术科学]