Cost Benefits
- Increasing the structural capacity through stabilization can reduces aggregates needed by 30-50%
- By improving the characteristics of aggregates, a lower quality aggegate can be used, thus offering increased savings by using lower quality aggregates.
- Using in-place base stabilization reduces trucking costs
- Using in-place base stabilization reduces construction time compared to removal and replacement
Factors that may Impact Cost
- Size of project
- Traffic maintenance (closed local traffic only vs. alternate traffic patterns through the project)
- Urban work (manholes / catch basins, intersection control add to cost) vs rural work
- Night work (costs more for labor but less traffic disruptions)
- Bidding/Tender date vs Completion date, number of working days
- Raw material pricing (stabilizing agent)
- Aggregate source, availability in area
- Competitive bids (number of contractors in Region)
Decrease Cost Without Affecting Quality
- Perform preconstruction testing and evaluation (drainage, subgrade, structure, etc)
- Incorporate base stabilized layer into structural design
- Provide mix design with bidding/tender
- For reconstruction provide cores to give contractor better assessment of existing material
- Early bidding/tender closing (ideally Oct-Dec for the next year’s work)
- Clear, constructable specifications and QC requirements
- Fair assignment of risk
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