Slab Stabilization

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Slab stabilization seeks to fill voids beneath the slab caused by pumping, consolidation or other means. If left untreated, these voids, which are often quite small (on the order of 3 mm (0.125 inches) deep), may cause other problems such as faulting, corner breaks or cracking (ACPA, 1995¹). Voids are typically filled by pumping grout through holes drilled through the slab.

Purpose

Preventive and corrective maintenance. Restores proper base/subgrade slab support to prevent more serious distresses such as faulting, corner breaks and cracking.

Materials

Pozzolan-cement grout.

Other Information

Slab stabilization only fills the voids under a slab, it should not be confused with slab jacking, which is used to raise the elevation of a depressed slab.

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APA

Pavement Interactive. (2026, November 1). Slab stabilization. HeadLight. Retrieved [the date you read it], from https://pavementinteractive.org/reference-desk/maintenance-and-rehabilitation/maintenance/slab-stabilization/

ASCE

Pavement Interactive. (2026). “Slab Stabilization.” HeadLight, <https://pavementinteractive.org/reference-desk/maintenance-and-rehabilitation/maintenance/slab-stabilization/> ([the date you read it]).

BibTeX

@misc{pavint-slab-stabilization,
  author = {{Pavement Interactive}},
  title = {Slab Stabilization},
  year = {2026},
  publisher = {HeadLight},
  howpublished = {\url{https://pavementinteractive.org/reference-desk/maintenance-and-rehabilitation/maintenance/slab-stabilization/}},
  note = {Accessed [date]}
}

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Sources (1)

American Concrete Pavement Association (ACPA) (1995). Construction of Portland Cement Concrete Pavements. National Highway Institute Course No. 13133. AASHTO/FHWA/Industry joint training. Federal Highway Administration, Department of Transportation. Washington, D.C. ↩

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