What is a likely consequence of having low density areas in pavement compared to higher density areas?

Low density areas in pavement can lead to several detrimental effects, making it important to ensure uniform density during construction. When density is low, the structure has more voids, which can lead to increased susceptibility to air and water intrusion. This vulnerability is critical because moisture can seep into the pavement, causing issues like stripping of the asphalt binder and weakening the material. Consequently, areas with lower density can experience accelerated damage over time due to these factors.

Moreover, low density can also lead to increased oxidation. The presence of additional air space provides more opportunities for oxygen to interact with the binder in the asphalt mix, which can lead to its degradation and aging. This results in a higher rate of oxidation compared to higher density areas where the binder is more effectively protected.

While increased viscosity in the binder is not a direct consequence of lower density, the degradation of the binder through oxidation can affect its physical properties, including viscosity. Nonetheless, the immediate and more significant issues arise from the increased susceptibility to air and water damage along with the associated rate of oxidation.

Taking all of these points into consideration, it is clear that the correct rationale encompasses multiple negative consequences associated with low density areas, affirming the comprehensive nature of the answer.