School Floor Leveling

Polyurethane grouting to correct settlement of a middle school floor in West Virginia

Challenge:

The slab floor of a hallway in a middle school settled up to 3.5 inches.  A geotechnical study identified voids up to 2.5 inches below the slab throughout the corridor.

Limits:

The proposed repair needed to address the settlement by lifting the floor.  Due to budgetary constraints, the repair could not disturb the VCT flooring.  

The Solution:

CJGeo proposed polyurethane grouting for this slab foundation repair project.  Polyurethane grouting uses low unit weight grout, which decreases the chances of future settlement.  Polyurethane grouting is performed through 5/8″ holes drilled through the slab.  This reduces impacts to flooring, and facilitates fast, efficient repairs.

Result:

CJGeo successfully performed this concrete floor repair project in less than a day.  By using polyurethane grouting, there was no disturbance to the VCT flooring, and the corridor was able to be used normally immediately afterwards.