If a core does not delaminate, what should the technician do to separate the core from the subgrade?

Applying maximum force to separate a core from the subgrade is not the appropriate action. When a core does not delaminate, it indicates that it is securely adhered to the underlying layers. In this situation, using a gentle pull is the most suitable method for carefully removing the core without causing damage to the specimen or the surrounding area.

Forceful removal can lead to non-representative samples or even damage the integrity of the core, which is essential for accurate testing and analysis. The objective is to obtain an intact core for evaluation, so handling it gently helps preserve its condition.

Other methods, like waiting for natural detachment or soaking the core with water, could introduce issues such as extended wait times, potential alteration of the core properties, or even complicating the testing process. Thus, the recommended practice would involve a gentle approach to manage the separation process effectively.