ACI Adhesive Anchor Installer Certification Practice Exam

What type of cleaning equipment can be used for a dry installation of adhesive anchors?

1. Water and rags

2. Brushes and oil-free compressed air

3. Solvents and squeegees

4. Vacuum and detergent

The correct answer is: Brushes and oil-free compressed air

For a dry installation of adhesive anchors, using brushes and oil-free compressed air is the appropriate choice because it effectively removes debris and dust from the anchor hole without introducing moisture. This is crucial, as the presence of water can impair the bonding of the adhesive to both the joint surfaces and the surrounding concrete, potentially compromising the anchor's performance. The use of brushes helps dislodge any particulate matter, while oil-free compressed air can clean the hole further by blowing out loose material. Ensuring that the hole is clean and dry allows for optimal adhesion, which is vital for the integrity of the anchor installation. The other options involve moisture or substances that could interfere with the curing and bonding process of the adhesive. For example, using water and rags introduces humidity, while solvents may leave residues that are not conducive to proper adhesion. Vacuuming with detergent also could leave a film that undermines the adhesive bond. These considerations make brushes and oil-free compressed air the most effective and suitable choice for cleaning during a dry installation of adhesive anchors.