What is the alternative to achieving the original pavement thickness for asphalt reconstruction after trenching?

For asphalt reconstruction after trenching, achieving the original pavement thickness is crucial for maintaining the structural integrity and longevity of the pavement. The alternative thickness usually adopted is a specified percentage or a set increment of the original thickness, which often aims to ensure adequate strength and performance without compromising the quality of the repair.

Selecting a thickness of 100 mm as the alternative recognizes the balance needed between maintaining adequate load-bearing capacity and the practicalities of asphalt application. This thickness is often sufficient to support typical traffic loads while allowing for a reasonable margin of error in the reconstruction process. The choice also considers factors like the quality of materials used, traffic conditions, and the underlying pavement structure.

In contrast, other thicknesses such as 75 mm might not provide enough structural support for heavier traffic loads, potentially leading to premature cracking or degradation of the repaired area. Increasing to 125 mm or 150 mm may lead to unnecessary costs and material usage without significantly enhancing the performance beyond what 100 mm would achieve in most situations. Thus, the use of 100 mm strikes a practical balance between durability and efficiency in asphalt reconstruction.