Experimental Investigation of Post-Installed Anchors’ Behavior Under Axial Tensile Force

In this research, the ultimate bond capacity of post-installed anchors for adhesives (three brands: HIT-RE10, ROX-GU80 and DUBELLF1331) and grouts (FLO-GROUT2) has been evaluated experimentally and compared with the reference cast-in-place anchors. In addition, a parametric study has been conducted to assess the effects of the anchor diameter (10, 12, 16 mm), anchor embedded length (5db,10db and 15db) and the cleaning method on the adhesive and grouted anchors. Among the used three adhesive brands, the anchor adhesive Brand “HIT-RE10” had the largest bond capacity. Furthermore, apart from the small embedded length (5db), the experimental results showed that the ultimate bond capacity of the post installed anchors was higher than the reference cast-in-place anchors. In the same embedded length range (>5db), the average bond stress decreased with the increase in the embedment length. With respect to the effect of the increase in the embedment length and the diameter parameters, the results showed that there is a corresponding increase in the ultimate bond capacity in both the adhesive and the grout anchors. For the cleaning method parameter in adhesive anchors, the cleaning with air only achieved a higher ultimate bond capacity compared with cleaning using air plus wire brush; however, in grout anchors, the cleaning using air plus wire brush produced the larger capacity. The results also showed that cleaning the holes of the adhesive anchors by washing with water and wire brush produced the highest ultimate bond capacity compared with the other two cleaning method.