Base Stabilization

Base Stabilization


MG-30 calcium chloride/magnesium hydroxide


Calcium chloride is easily applied following the Kortech Calcium Chloride Application Protocol


  • Calcium chloride base stabilization hardens the road surface to reduce rutting from heavy traffic.
  • MG-30 binds the particles in the road surface to create a higher compaction level versus untreated surfaces.
  • MG-30 brings a clay component called magnesium hydroxide that is very effective in silty/sandy aggregates.
  • Reduces the need for regular blading.
  • Reduces potholes, washboard and soft spots in a road surface.
  • Does not harm surfacing of asphalt or pavement.

Freeze Thaw Stability:

  • Calcium chloride reduces frost heaving caused by the freeze thaw cycle. Deep penetration of calcium chloride can reduce spring and fall maintenance costs by reducing road surface and base maintenance work costs.
  • A Swedish study has found calcium chloride can reduce frost lenses, which cause frost heaves, by up to 60%.


Q:What other costs are associated with a calcium chloride application?
A:there are application costs to consider in addition to the cost of the calcium chloride. The cost of trucking and application can be included in the purchase of calcium chloride, however, additional costs to application include: water truck costs, grader costs, and in some cases mixer/reclaimer costs. For the calcium chloride application it is recommended to have a water truck pre-wet the aggregate at a rate of 0.7—1.0 litres per meter square before we apply the calcium. Please refer to the recommended application procedures for full application instruction.

Area of Roadway (length x width) Width of Roadway (meters) 5m 7m 10m
Length of Roadway (meters) - - - -
100 m (0.1 km) - 500 m2 700 m2 1000 m2
200 m (0.2 km) - 1000 m2 1400 m2 2000 m2
500 m (0.5 km) - 2500 m2 3500 m2 5000 m2
1000 m (1 km) - 5000 m2 7000 m2 10 000 m2

Product needed (area x application rate) Area of road surface (m2) 500 m2 2500 m2 10 000 m2
Application rate (litres per m2) Depth of Treatment - - -
3.0 litres per m2 3.0 inches (7 6 cm) - 1500 litres 7500 litres 30 000 litres
3.0 litres per m2 3.0 inches (7.6 cm) deep - 1500 litres 7500 litres 30 000 litres
6.0 litres per m2 6.0 inches (15.2 cm) deep - 3000 litres 15 000 litres 60 000 litres
12.0 litres per m2 12.0 inches (30.5 cm) deep - 6000 litres 30 000 litres 120 000 litres

Q:How long will it take to complete the base stabilization?
A:Base stabilization applications take varying amounts of time dependant on several factors:

  • Amount of roadway to complete
  • Application depth (3.0 inches—12.0 inches in depth)
  • Environmental conditions; especially extended periods of rain or sunshine.

Stabilizing unpaved roads with calcium chloride. Monlux, S

The U.S. Department of Agriculture Forest Service has stabilized un-paved road surfacing materials with relatively high concentrations of calcium chloride salt. The percentage of calcium chloride is higher than that traditionally used for dust abatement or aggregate base stabilization.

Up to 2% pure salt by weight of aggregate was mixed into the top 2 in. (50 mm) of both aggregate and native road surfaces. The results were monitored for 2 to 4 years. The stabilized road surfaces resisted raveling and washboarding for several seasons and significantly reduced road blading and aggregate loss.

As a result, calcium chloride stabilization may be a cost-effective treatment for roads with daily traffic volumes less than 200. Other benefits include reduced surface erosion and sedimentation; improved safety from reduced dust, raveling, and washboarding; and less frost penetration.

Encouraged by these results, the Forest Service is conducting additional evaluations to determine the cost effectiveness of surface stabilization with both magnesium chloride and calcium chloride in different environments and with different aggregate materials.

Transportation Research Record , no. 1819, Volume 2, pp. 52-56. 2003
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