Analysis of Polymer Slab Jacking vs. Mud Jacking
Production Savings: Polymer Injection is 4 to 8 times faster than traditional methods and requires smaller crews.
Traffic Control Savings: Total time required for closure is reduced 4 to 1 because of production savings. Delay time before traffic may return to treated roadway after completion of injection is approximately 15 minutes.
Life Cycle Savings: The Polymer Injection process has a minimum 4 to 1 advantage over conventional mud jacking’s life span of 1 to 2 years with a typical polymer 10 year warranty against shrinkage and deterioration.
|CST Polymer Injection||Traditional Mudjacking|
|PRESSURE OF INJECTION||Low Pressure||High Pressure|
|HOW IT LIFTS||Chemical reaction creates expansion of polymer that lifts the slab.||Fluid or Hydraulic pressure of grout lifts the slab.|
|CURE TIME||Expands in less than one minute and reaches 90% strength within 15 minutes.||Requires additional cure time of 4 hours or more to complete hydration.|
|ACCURACY OF LIFT||Surgical precision lift to desired elevation is accomplished.||An “over-lift” is necessary to compensate for water loss in the grout as it cures.|
|FOOTPRINT/PROPERTY IMPACT||Small 5/8” holes, about the size of a penny, are drilled to inject polymer with no damage to existing concrete slab.||Large 2 to 3 inch holes are drilled to inject high pressure grout. This can compromise the concrete causing breakout at the bottom of the slab.|
|LIFECYCLE OF REPAIR||Permanent lift & stabilization is standard. Polymer material is guaranteed for 10 years.||Longevity of lift/repairs is expected to last for approximately 1 year. University of Illinois Study 1985-1989.|
|COST IMPACT||Savings over tear out and replace. One time cost.||Ongoing cost due to need for rework/repair of same area.|