Benefits of Lime Kiln Dust in Soil Modification, Soil Stabilization, and Full Depth Reclamation

What is Lime Kiln Dust (LKD)?

Lime Kiln Dust, a.k.a LKD, is a byproduct created when manufacturing Quicklime. When limestone is naturally heated, it produces gas with dust. The dust that is screened out is called Lime Kiln Dust.  LKD, has little beneficial use, and is mostly disposed of into landfills. The site work industry uses LKD as a stabilizing agent to dry poor soils.

LKD in Modification, Stabilization and FDR

Soil Modification: Blending LKD into wet fill, often referred to as “Dry Down” can keep projects on time and on budget.  Dry Down is one of the most common uses for LKD.  It is very good at removing moisture from fill materials, so compaction can be achieved faster allowing for another lift of fill to be placed.

Lime Kiln Dust

Soil Stabilization: LKD can be used to stabilize building pad or parking lot sub-grades when existing soils are mostly comprised of clay like materials.  The increase in strength can be used to offset the thickness of aggregate base or surface (slab or pavement) needed to meet the engineers structural design.  This offset can provide big value.  See our NIMC case study to learn more.

Lime Kild Dust

Full Depth Reclamation: LKD can be used as an additive in combination with bituminous stabilizing agents to increase strength when repairing reclaimed materials with higher clay content.  Click HERE to learn more.


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