小直径钻芯对芯样采取率影响的试验研究

The Experimental Research on Tiny Invasive Coring Effect on Core Recovery Rate

通过室内试验,开展小直径钻芯与常规直径钻芯的芯样采取率、芯样表观质量、孔壁表观质量的比较研究。研究结果表明:与常规100 mm直径比较,采用小于44 mm的直径取芯时,对常用标号的混凝土构件钻芯的芯样采取率等指标基本无影响。

The invasive core drilling method is a means to detect compressive strength and internal defects of concrete and masonry structure.In this paper,the indoor core tests of concrete were carried out to compare the core recovery rate,apparent quality of core sample and apparent quality of pore wall of small diameter coring with that of conventional coring.It shows that compared with conventional coring with 100 mm diameter,when the diameter is less than 44 mm,small diameter coring technique has no effect on the core recovery rate of traditional concrete structure.