Why Do Expansive Pierre Shale Soils Crack Denver Commercial Pavements?
June 23, 2026
Pierre Shale is a Late Cretaceous marine shale formation rich in smectite and montmorillonite clay minerals that swell when wet and shrink when dry, generating a relentless swell-shrink cycle beneath Denver commercial pavements. This cycle is the primary reason parking lots, loading areas, and access roads across the metro area develop cracking, heaving, and settlement
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