ACI Adhesive Anchor Installer Certification Practice Exam

What materials are likely to result in adhesive anchor failure?

1. Only steel components

2. High-temperature adhesives

3. Improperly cured concrete

4. None of the above

The correct answer is: Improperly cured concrete

Adhesive anchor failure can occur due to a variety of factors, but one significant factor is the condition of the substrate or base material to which the anchor is being bonded. Improperly cured concrete presents a high risk for adhesive anchor failure. When concrete is not fully cured, it may not achieve the necessary strength and structure to provide an effective bond with the adhesive. This could lead to insufficient load-bearing capacity, crack formation, or even detachment of the anchor under stress. In comparison, while materials like steel components can influence the bond's effectiveness, they are not inherently problematic when used correctly. High-temperature adhesives are designed to perform well under specific thermal conditions. Therefore, the primary reason for choosing improperly cured concrete as a factor leading to adhesive anchor failure emphasizes the importance of the bonding medium's quality in ensuring the success of the anchoring system.