CRACKING THE MYTHS: THE TRUTH ABOUT PAVEMENT PRESERVATION
Why cracks in concrete do not signal poor quality
Welcome to the sixth and final installment of our six-part series on concrete pavement preservation (CPP) education. Each installment has examined a misconception that shapes how agencies plan, budget and make pavement decisions, along with what the evidence shows. This week we close the series with a belief that often shapes first impressions of a roadway and the decisions that follow.
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Myth: Cracks in concrete indicate poor quality
When a concrete pavement shows cracking, many observers assume something went wrong during design or construction. Visible cracks can prompt public concern and pressure to replace pavement that remains structurally sound
Reality: Cracking can be normal and manageable
Concrete pavement responds to curing, temperature changes and traffic loading over time, and some cracking is a natural result. The key issue is not whether a pavement shows cracking. It is the type, severity and location of that cracking. A low-severity crack in otherwise sound pavement calls for a very different response than widespread structural distress.
That is why engineers use joints, reinforcement and preservation treatments to manage pavement performance throughout its life cycle:
Joints and reinforcement are designed to manage movement. Concrete expands, contracts and shrinks as it cures and ages. Joints control where cracking occurs, and reinforcement helps hold the pavement together as it moves.
Cross-stitching holds cracks tightly together. This technique adds reinforcing steel across low-severity longitudinal cracks, keeping them tight and helping the pavement continue to carry loads as designed.
Dowel bar retrofit restores load transfer at transverse joints and cracks ensuring structural integrity across them.
Joint and crack resealing keeps water out. Resealing limits the infiltration of surface water and incompressible material. This reduces subgrade softening, slows pumping and erosion of subbase fines, and may limit dowel bar corrosion caused by deicing chemicals.
Addressed early, developing distresses do not have to become major failures. CPP helps agencies maintain structural integrity, ride quality and long-term serviceability, protecting the pavement investment they already have.
Explore the IGGA Pavement Preservation Toolkit for recommended treatments by distress type and technical references.
Thank you for following the series
Over these six installments, we have examined the most common misconceptions about CPP and the evidence that answers them. Taken together, they show that CPP is a proven, engineered strategy that protects existing pavement assets, extends service life and helps agencies get the most from every dollar.
To continue building the case for preservation in your agency, visit the IGGA Pavement Preservation Toolkit: https://www.igga.net/pavement-preservation-toolkit