Class 6N material is a selected, well graded granular fill material that is typically used as a fill to structures. The grading requirements for this material are defined in Series 600 Earthwork of the Specification for Highway Works.
It can be produced using quarried or recycled materials
This includes materials such as natural gravel, natural sand, crushed gravel, crushed rock, crushed concrete, slag or well burnt colliery spoil.
If the material is to be used within the construction of highways then it must meet the specification set out in the Series 600 Earthworks of the Specification for Highway Work.
Compliance with these specifications ensure the durability, safety and reliability of highways.
Table 6/2: Grading Requirements for Acceptable Earthworks Materials (continued)
Table 6/5: Imported Onto Site Grading Requirements for Class 6 Acceptable Earthworks Materials
Source:
...It Shouldn't Cost The Earth
