Title: Factors Influencing Bond Strength of Adhesive Anchors

Author(s): Ronald A. Cook and Robert C. Konz

Publication: Structural Journal

Volume: 98

Issue: 1

Appears on pages(s): 76-86

Keywords: adhesives; anchor; fastener.

DOI: 10.14359/10149

Date: 1/1/2001

Abstract:
This paper presents the results of a comprehensive test program investigating various factors with the potential to influence the bond strength of polymer-based adhesive anchors. Twenty products from 12 manufacturers were included in the program for a total of 765 tests. To establish a reference bond strength, baseline tests were performed at room temperature for anchors installed in cleaned, dry holes. Individual factors were isolated through separate test series that maintained baseline conditions, except for the one variable under consideration. The variables investigated included those that could be anticipated to occur during and after installation. Factors occurring during installation included the condition of the drilled hole (for example, cleaned, uncleaned, damp, and wet), differences in the concrete strength, and differences in concrete aggregate. Factors occurring after installation included a short-term adhesive curing period and loading at an elevated temperature. This research demonstrated that reliable predictions of adhesive anchor performance are only practical by product-specific and condition-specific testing.