FAQ's
Frequently Asked Questions
How do we determine if our material is compatible?
Through your Con-Aid distributor, an ion reactivity test will be conducted, and soil samples should also undergo a hydrometer test, grain sieve analysis, and Atterberg limit evaluation. Together, these tests determine whether additional gravel or clay is needed or if the existing material is suitable for treatment.
How well does CON-AID work with highly plastic clays and/or Asphalt?
Con-Aid performs well in highly plastic soils by reducing their shrink–swell characteristics and is also effective with milled asphalt, provided the asphalt is thoroughly mixed with the clay.
How do we prepare our roads for treatment with CON-AID?
Ensure the road is shaped to the required specifications, including a 4% crown on the road surface, proper road width, and correct grade slopes (e.g., 3:1). Repair any underlying issues, then scarify the road to a depth of 20 cm to prepare it for Con-Aid treatment and mixing.
What do we do with existing soft spots or frost boil?
In most cases the areas should be excavated and backfilled with appropriate pit run material then apply geotextile before placing subgrade.
Some roads have poor drainage; will this effect the end result?
Yes, it will. Good drainage is vital to extending the life of any road. Proper drainage must be provided on either side of the road.
What is a proper surface crown?
A suitable crown is vital for the longevity of a road. It is essential that a crown of 4% be maintained on a road.
What if we don’t want to do it ourselves?
We provide recommendations for contractors with proven expertise and qualifications.
Do you need to repeat the treatment?
The reaction of CON-AID with the clay particles in the soils is permanent. Some existing roads have been in use for over 20 years and have shown little or no deterioration over this period. If treatment is required at all, it would only be if additional material is imported.