小直径芯样检验结构混凝土抗压强度研究

Study on inspecting the compressive strength of concrete structure with samll diameter core

根据复掺粉煤灰矿粉混凝土泵送成型的、大型实体结构试验模型的墙体上所取高径比为1的100、75、55芯样强度数据,本文分析芯样抗压强度的尺寸效应与小芯样检测复掺粉煤灰矿粉混凝土强度的可靠性;采用均值与最小二乘法线性回归两种统计方法,分别给出小芯样与标准芯样间的强度换算关系;对两种方法进行比较分析,给出小芯样与标准芯样间的强度换算取值建议;同时对不同取芯部位所得到的结构混凝土强度的差异进行初步研究。

Based on the data which obtained from the models of large scale simulation structure which pumped with concrete complexing fly ash and slag,the article analysed the core sample size effect by the three diameter of core sample from the solid models,and the reliability of the small diameter core inspecting the structure compressive strength of the concrete mixed with fly ash and slag is analysed.Through the statistics of the mean value method and the least square method were comparison,the strength fomula and conversion value between the small diamter core and the standard core was suggested.At the same time,primary discussed the difference in compressive strength of core sample frome the diffirent area in the shear wall.