Which option best describes the material identified as Select (A-3, A-4)?

Which option best describes the material identified as Select (A-3, A-4)?

• A. It is the material that can be used anywhere in the embankment
• B. It is a test method
• C. It is a type of binder
• D. It is a grading designation

Answer: (A)

Select material is a category of fill that meets specific quality and gradation criteria so it can be placed throughout the embankment, not limited to a particular layer or location. The A-3 and A-4 designations specify the particular gradation classes within that select material, outlining the allowed particle sizes. This makes it suitable for general placement anywhere in the embankment while still meeting project specs. It’s not describing a test method, a binder, or a separate grading designation; the designation identifies the material class and its gradation characteristics.

Select material is a category of fill that meets specific quality and gradation criteria so it can be placed throughout the embankment, not limited to a particular layer or location. The A-3 and A-4 designations specify the particular gradation classes within that select material, outlining the allowed particle sizes. This makes it suitable for general placement anywhere in the embankment while still meeting project specs. It’s not describing a test method, a binder, or a separate grading designation; the designation identifies the material class and its gradation characteristics.