Soil Stabilization & Soil Modification

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Construction Troubleshooting

Uneven Distribution of Dry Modifying/Stabilizing Agent

  • Apply dry agents with calibrated bulk spreader
  • Ensure dry agent is evenly spread across width of spreading equipment
  • Check for plugged valves/vanes on bulk spreader

Subgrade stays spongy and/or will not densify

  • Reestablish control strip and/or density rolling pattern
  • If steel wheel rollers are sealing the surface and causing moisture retention, use a heavy pneumatic tire roller or padfoot roller for the breakdown and compaction rolling
  • If excess moisture is in the mix, revise modifying/stabilizing agent and water as necessary
  • Check for deep subgrade instability

Post-Construction Troubleshooting

Areas of raveling, scuffing or tearing

  • Sweep and monitor. 
  • Maintain better traffic restrictions in areas that are not cured.
  • Determine if fog sealing or re-fog sealing is necessary to protect.
  • Repair deep damaged areas with modified/stabilized material prior to application of pavement structure.

Permanent deformation within wheel path areas due to secondary compaction by traffic

  • Keep traffic off treated material until sufficiently cured.
  • After initial cure limit traffic to light vehicles
  • Use motor grader to smooth surface
  • Regrade prior to application of pavement structure

Permanent deformation and shoving due to unstable mix

  • Investigate structure in conjunction with mix design lab. Depending on investigation, add additional modifying/stabilizing agent and rework existing areas. Remove and replace affected materials.