小直径芯样检测预制薄壁构件混凝土抗压强度研究  

Research on the compressive strength of precast thin⁃walled concrete components detected by small diameter core samples

作　　者：杜凤阁 DU Fengge(Langfang Water Resources Bureau,Langfang 0650001,Hebei,China)

机构地区：[1]廊坊市水利局,河北廊坊065000

出　　处：《工程建设》2024年第12期29-34,共6页Engineering Construction

摘　　要：为提高小直径芯样检测农田水利工程薄壁预制构件混凝土抗压强度的检测精度,文章收集整理国内现有相关钻芯法试验数据,分析了混凝土中的粗骨料类型对不同直径芯样抗压强度以及其与标准尺寸立方体试件抗压强度间拟合线的影响,采用最小二乘法回归了小直径芯样法测强公式。结果表明:骨料类型对直径40 mm芯样抗压强度及其相关性曲线基本无影响,但对直径60 mm芯样抗压强度及其强度相关性曲线影响显著;基于文献试验数据,拟合得到的小直径芯样法测强公式均具有较高检测精度,可结合具体检测条件选取应用。研究成果可为水利与土木工程结构混凝土强度质量控制提供参考。In order to improve the accuracy of detecting the compressive strength of thin⁃walled precast concrete components in agricultural water conservancy projects using small⁃diameter core samples,this article collects and organizes relevant drilling core method test data in China,analyzes the influence of coarse aggregate types in concrete on the compressive strength of different diameter core samples and their fitting lines with the compressive strength of standard size cubic specimens,and uses the least squares method to regress the strength measurement formula of small⁃diameter core samples.The results showed that the type of aggregate had little effect on the compressive strength and its correlation curve of the 40 mm diameter core sample,but had a significant impact on the compressive strength and its correlation curve of the 60mm diameter core sample;Based on literature experimental data,the fitted small diameter core sample method strength measurement formula has high detection accuracy and can be selected for application according to specific detection conditions.The research results can provide reference for the quality control of concrete strength in water conservancy and civil engineering structures.

关 键 词：混凝土抗压强度 小直径芯样 预制薄壁构件 钻芯法 

分 类 号：TU528.1[建筑科学—建筑技术科学] TU528.31