基于孔道条件的表面硬度法检测灌浆料抗压强度试验研究

Experimental study on testing compressive strength of grouting material by surface hardness method based on pore condition

为进一步研究装配式混凝土结构中钢筋套筒连接灌浆料强度现场检测技术,分析了孔道条件与标准试件测试的差异,提出了现场检测面的获取方法;设计并制作了48组孔道条件模拟试件,测试了其表面硬度和抗压强度,拟合了测强曲线。结果表明:表面硬度基本服从正态分布,灌浆料抗压强度与其表面硬度强正相关,指数回归拟合下,相关系数达0.906。

For further research of prefabricated concrete structure reinforcement sleeve connection strength of grouting material field detection technology,analyzed the field pore condition and the difference of the standard specimen test proposed site access methods for testing,designed the 48 group of channel conditions simulated specimen,tested the surface hardness and the compressive strength,established the strength curve.The results show that the surface hardness is normally distributed,and the compressive strength of grouting material is positively correlated with its surface hardness.Under exponential regression fitting,the correlation coefficient reaches 0.906.