ACI Adhesive Anchor Installer Certification Practice Exam

What is the principle behind mixing capsule adhesives?

1. By heating the materials

2. By impact or spinning of the anchor

3. By using a mixer tool

4. By manual stirring

The correct answer is: By impact or spinning of the anchor

The principle behind mixing capsule adhesives revolves around the use of impact or spinning of the anchor. Capsule adhesives typically consist of two components that need to be blended to activate the adhesive properties. When the anchor is inserted into the capsule, the force of impact or the spinning motion helps to rupture the capsules that contain the resin and hardener ingredients. This action mixes the components as they flow together, enabling proper bonding with the base material. This method of mixing is particularly effective because it ensures a thorough blending of the materials right at the point of application, which is crucial for achieving the desired strength and performance of the adhesive bond. Other methods, such as manual stirring or using mixer tools, may not be applicable in the context of capsule adhesives, as the unique design is meant to facilitate mixing through the specific mechanical actions involved during installation.