Have you ever used lightweight EPS fill as flexible/rigid pavement subgrade? If yes, what CBR/k can be used? Perhaps, the EPS compressive strength can be correlated with CBR/k? Traffic is composed of medium size forklifts (10-15 kip axle forklift, max 50 operations/day in 25 yrs design life). This is for an industrial warehouse slab-on-grade. Based on these conditions, is it a good idea to use EPS for flexible/rigid pavement subgrade? In my opinion concrete pavement is preferable but client is approaching for flexible pavement because the site is on a reclaimed area which has potential for differential settlements. However, some studies indicate that remaining long-term consolidation settlement due to fill placement during the reclaim project may be about 30 mm which I feel are acceptable. I am planning to measure pore water pressures to check if they have been dissipated. Grade will not change so additional loading which may result in additional settlements is not expected.
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