If your site has sandy/silty soil, Joe's Dozer Service has experience using fly Ash to fix the foundation! Given its cementitious properties, fly ash can dry down wet soils and increase the strength of each fill layer. It works best in sandy/silty soils, but can be very effective in lean clays as well.
Using fly ash to strengthen the top 8”-14” of subgrade can decrease the thickness of aggregate base and/or pavement needed to achieve the structural design strength of the pavement section. It also a great option to stabilize existing aggregate base when performing parking lot repairs or upgrades.
Joe's Dozer Service relies on fly ash to stabilize bases or subgrades, to stabilize backfill to reduce lateral earth pressures and to stabilize embankments to improve slope stability, mainly in sandy/silty soils.