Beware of Coloradans – Bentonite Clay Cracks Concrete in Driveways and Patios
Most of the soil under Colorado concrete driveways has an unusual ability to expand and contract due to moisture absorption. The reason? Bentonite clay. Bentonite, or sodium bentonite, expands when wet, possibly absorbing several times its dry mass in water. While most bentonite-containing soils will not expand more than 35 to 50 percent by volume, it is this volume expansion […]
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