What is the Marshmallow test in asphalt compaction?

The Marshmallow test in asphalt compaction refers to a field test that employs a small rubber ball to estimate the density of the asphalt. This test is relevant in assessing the quality of asphalt compaction in the field, ensuring that the hot mix asphalt is compacted to the required density, which is crucial for the longevity and performance of the pavement. Using a rubber ball, technicians can obtain a quick estimate of how well the asphalt has been compacted without the need for taking official core samples.

In contrast, the other options do not accurately reflect the intent or method of the Marshmallow test. While laboratory tests to gauge asphalt temperature and viscosity may inform overall asphalt quality, they are separate processes not associated with the density estimation that the Marshmallow test emphasizes. Furthermore, evaluating the flexibility of asphalt serves a different purpose, focusing on the material's performance under various conditions rather than its immediate compaction results.