Which task would be used specifically to monitor compaction during paving?

• A. Monitor compaction within nuclear gauge
• B. Read design drawings for thickness
• C. Calibrate asphalt binder suppliers
• D. Inspect drainage pipes

Answer: (A)

Measuring in-place density with a nuclear gauge is used to monitor compaction during paving. The gauge provides quick, on-site readings of how dense the asphalt mat is as it’s being laid and compacted. Those density readings correspond to the percent compaction and air void content of the pavement, which are the key indicators you watch to determine whether the rollers have achieved the required compaction or if additional passes are needed. This real-time feedback helps ensure the pavement meets specifications for strength, durability, and resistance to moisture damage.

Other tasks don’t address compaction directly. Reading design drawings for thickness tells you how thick the layer should be, not how dense it is. Calibrating asphalt binder suppliers focuses on binder properties and mix design, not field compaction. Inspecting drainage pipes relates to drainage and not the compaction state of the asphalt layer.