Most edmonton paving has an the unusual ability to expand and contract due to moisture absorption. Betonies, or sodium betonies expand when wet, possibly absorbing several times its dry mass in water. While most soils containing betonies will not expand more than 35 to 50 percent in volume, it is this expansion in volume that causes the pressure and movement. No concrete is safe, even stamped or decorative concrete can be damaged by swelling soil. Cracking and lifting of concrete is common among most Denver residences.
If you are serious about eliminating the maintenance issue surrounding betonies and its effects on concrete, paving stones are the solution in Colorado.
A correct instillation of paving stones removes betonies soil down to 12 inches beneath the grade. A geo-tax fabric is then placed in the excavated area. This fabric preserves the load bearing capacity of the base for a greater length of time. High compaction road-base is then added between the geo-tax fabric and underneath soil. A high impact plate-compactor is then used to compact the road-base. This eliminates water expansion and air pockets within the base layer. A small layer of bedding sand is added and smoothed over the road base completing the base layer instillation.