What is the expected lifespan of a well-maintained asphalt pavement?

The expected lifespan of well-maintained asphalt pavement is typically around 15 to 30 years due to several key factors that influence durability and longevity. This lifespan reflects a combination of quality materials, appropriate installation techniques, and regular maintenance practices such as sealing, patching, and surface treatments.

Asphalt pavements are designed to withstand various loads and environmental conditions, contributing to their longevity. Adequate drainage systems, proper compaction, and appropriate thickness also enhance the lifespan. Regular maintenance can prevent minor issues from escalating into major repairs, thus significantly extending the lifespan of the pavement.

Additionally, advances in asphalt technology and materials have further improved the durability and performance of asphalt pavements. For instance, innovations such as polymer-modified asphalts or warm-mix asphalt can enhance resistance to cracking and deformation, leading to a longer service life.

In contrast to the other options, which suggest either a shorter lifespan or an overly broad and vague dependency on aggregate type, the understanding that well-maintained asphalt typically lasts between 15 to 30 years aligns with industry standards and empirical evidence from pavement management practices.