Which type of reinforcement is specifically used for temperature and shrinkage control in a concrete deck?

The correct response identifies secondary reinforcement as the type specifically intended for temperature and shrinkage control in a concrete deck. Secondary reinforcement is designed to manage the effects of temperature changes and shrinkage that can develop within a concrete structure as it cures and ages.

This type of reinforcement plays a crucial role in maintaining the structural integrity of the concrete deck by minimizing cracking and ensuring uniform distribution of stresses that arise during temperature fluctuations. When concrete dries, it tends to shrink, and if not properly reinforced, this can lead to cracks that compromise the deck's performance and longevity.

Primary reinforcement is typically used to handle the main structural loads that a bridge deck might experience, rather than dealing with the subtle movements caused by temperature changes or shrinkage. Negative moment tension reinforcement functions specifically at supports or over spans where negative moments are developed due to loadings, not for temperature control. Incorporated reinforcement is a broader term and does not specifically refer to the reinforcement used for temperature and shrinkage control; it can encompass various types of reinforcements that might not have a specific purpose.

Understanding the distinct roles of these reinforcement types helps clarify why secondary reinforcement is particularly vital for managing temperature and shrinkage stresses in concrete decks.