ACI Adhesive Anchor Installer Certification Practice Exam

Are adhesive anchors cast in concrete before the concrete hardens?

1. Yes, always

2. No, it is incorrect

3. Only for epoxy anchors

4. It depends on the type of adhesive used

The correct answer is: No, it is incorrect

Adhesive anchors are not cast in concrete before the concrete hardens; rather, they are installed into cured concrete. This is an essential aspect of the installation process, as the adhesive requires a solid base to properly bond and achieve the necessary load-bearing capacity. When installing adhesive anchors, it is crucial to follow the manufacturer's recommendations, which typically stipulate that the surrounding concrete must be fully cured before the adhesive is applied. Other choices refer to scenarios that do not align with standard practice for adhesive anchors. For instance, the notion that only epoxy anchors can be cast in fresh concrete does not reflect the general applicability of adhesive anchors overall. Likewise, the opinion that it depends on the type of adhesive used does not accurately consider the installation prerequisites for adhesive anchors as a whole. Finally, the statement that adhesive anchors are always cast in concrete before it hardens overlooks the critical point of ensuring that the adhesive can actually cure and bond effectively with the concrete substrate.