卵石混凝土回弹法专用测强曲线的研究  

Study on special strength curve of pebble concrete with rebound method

作　　者：雷周[1] 周佰祥 曹忠露[1] 李沛[1] LEI Zhou;ZHOU Bai-xiang;CAO Zhong-lu;LI Pei(Tianjin Port Engineering Institute Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中交天津港湾工程研究院有限公司,天津300222

出　　处：《中国港湾建设》2023年第4期65-69,共5页China Harbour Engineering

基　　金：中交一航局科技研发项目(2018-8-1)。

摘　　要：结合某海外工程实践,通过试验获取了不同强度等级的当地石灰石水泥卵石混凝土回弹值、28 d抗压强度值,采用回归分析的方法计算出当地专用测强曲线方程。通过现场工程结构构件取芯对测强曲线方程进行了分析验证。结果表明:该专用测强曲线方程相对误差小,计算所得混凝土结构回弹强度值接近于现场实际抗压强度值,可以满足规范对地区测强曲线要求。研究结果可为海外项目当地石灰石水泥卵石混凝土结构构件抗压强度现场检测结果评定提供一定的技术依据。Based on the practice of an overseas project,the rebound value and 28 d compressive strength of local limestone cement pebble concrete of different strength grades are obtained through tests,and the local special strength curve equation is worked out by using the regression analysis method.The strength curve equation is analyzed and verified by field coring in structural members.The results show that the relative error of the special strength curve equation is small,and the calculated rebound strength of the concrete structure is close to the actual compressive strength measured on site,which can meet the requirements of the code for regional strength curve.The results of the study provides a technical basis for evaluation of on-site testing results of compressive strength of local limestone cement pebble concrete structural members for overseas projects.

关 键 词：卵石混凝土 回弹法 测强曲线 无损检测 

分 类 号：U654[交通运输工程—港口、海岸及近海工程]