From the GMA Techline
I know you indicated sand was the ideal grid zone backfill. I suppose crushed limestone has a high installation damage reduction factor due to its angular nature. But what about a rounded river gravel?
We’re running out of ash as we near completion of an MSE wall, and a nearby sand/gravel quarry has a large stockpile of “pea gravel.”
(Brian | Kentucky)
Reply: Rounded river gravel would work with two obvious trade-offs:
- less installation damage than quarried gravel, and
- lower friction angle for stability.