Final answer:
Defective pavement is typically recycled and reused as aggregate in new pavement or other construction projects, providing environmental and economic benefits.
Step-by-step explanation:
When defective pavement is broken up into pieces, it can be managed in several sustainable ways. Often, the material is recycled and used as an aggregate in the construction of new pavement or other civil engineering projects. This process of recycling not only is environmentally beneficial by reducing the need for new materials, but it can also provide cost savings and improve the properties of the new pavement. For example, recycled concrete can be crushed and reused as base material for roads and as aggregate in new concrete, while asphalt pavement can be reheated and used to create new asphalt surfaces. Additionally, if recycling on-site isn't possible, the material might be transported to a recycling plant where it can be processed and repurposed for future use.