摘要
为了有效预测实际工程中活性粉末混凝土(RPC)盖板开裂强度与破坏强度,收集了27块实际工程中使用的RPC盖板,测试其表面硬度、表面回弹值、超声波波速、剪压值、名义开裂强度、名义破坏强度。线性拟合了不同检测参数与名义破坏强度、名义开裂强度之间的关系。结果表明:砂浆型回弹仪测得的RPC盖板表面回弹值与名义破坏强度线性相关性较强,相关系数为0.82。实际工程中推荐使用砂浆型回弹仪测试RPC盖板表面回弹值,预测其抗弯承载力。
In order to effectively predict the cracking strength and breaking strength of reactive powder concrete(RPC)covers in real projects.Twenty-seven RPC covers used in actual projects were collected and tested for surface hardness,surface rebound value,ultrasonic wave velocity,shear pressure value,nominal cracking strength,and nominal breaking strength.The relationships between different testing parameters and nominal breaking strength and nominal cracking strength were linearly fitted.The results showed that the linear correlation between the surface rebound value of RPC cover and the nominal cracking strength measured by mortar-type rebound tester was stronger,with a correlation coefficient of 0.82.It was recommended to use the mortar-type rebound tester to test the surface rebound value of RPC cover to predict its bending capacity in the actual project.
作者
聂良鹏
贠建洲
陈顺超
熊竑瑞
袁胜涛
NIE Liangpeng;YUN Jianzhou;CHEN Shunchao;XIONG Hongrui;YUAN Shengtao(Yunnan Tongqu Engineering Testing Co.,Kunming 650224,China;School of Civil Engineering,Southwest Forestry University,Kunming 650224,China;Yunnan Communications Investment&Constrution Group Co.,Ltd.,Kunming 650224,China)
出处
《无损检测》
CAS
2024年第5期83-88,共6页
Nondestructive Testing
基金
云南省交通运输厅科技项目(云交科教便[2020]91号)。
关键词
活性粉末混凝土盖板
超声波
回弹法
表面强度
抗弯承载力
剪压破坏值
reactive powder concrete(RPC)cover
ultrasonic wave
rebound method
surface strength
flexural capacity
shear damage value
