What is a potential outcome of using additives in asphalt mixtures?

Using additives in asphalt mixtures is primarily aimed at enhancing performance characteristics, one of which is improved durability. Additives can strengthen the asphalt binder or modify its properties, resulting in a mixture that can better withstand the stresses of traffic loads, temperature fluctuations, and environmental conditions.

Enhanced durability means that the pavement surface is less likely to crack, deform, or suffer from other forms of distress over time, which leads to a longer service life. This characteristic is particularly important for regions experiencing extreme weather conditions or heavy traffic volumes.

The other options represent potential effects of additives, but they do not encompass the primary benefit. Reduced viscosity, for instance, can facilitate easier mixing and application, while lowering asphalt temperature can lead to energy savings during production. Increased porosity is typically undesirable, as it can lead to moisture-related damage and reduced structural integrity. Thus, the primary outcome of using additives that significantly impacts the longevity and resilience of asphalt mixtures is indeed enhanced durability.