Concrete Defects - Carbonation

Carbonation is one of the most overlooked forms of concrete deterioration. While it often develops slowly and remains hidden for years, carbonation can reduce the concrete's natural protection of reinforcing steel, leading to corrosion, cracking, spalling, and costly structural repairs.

The Carbonation Field Reference was developed to help inspectors, technicians, contractors, engineers, and concrete professionals identify carbonation-related deterioration, understand the mechanisms behind it, evaluate severity, and determine appropriate repair and prevention strategies.

Using real-world examples, practical field guidance, severity classifications, inspection checklists, escalation triggers, and repair recommendations, this reference turns a complex durability issue into a clear and actionable field assessment.

Inside This Reference:

• Learn what carbonation is and how it affects concrete durability.

• Understand the chemical process that lowers concrete alkalinity and increases corrosion risk.

• Identify visual warning signs associated with carbonation and reinforcing steel deterioration.

• Review carbonation depth concepts and how they relate to reinforcement protection.

• Assess severity using simple Minor / Moderate / Severe classifications.

• Apply the Universal Escalation Rule to identify conditions requiring additional investigation.

• Use a quick field decision process to determine when monitoring, repair, or further evaluation is appropriate.

• Understand common causes, environmental influences, and contributing factors.

• Review repair options for carbonated concrete and corrosion-related damage.

• Utilize the included field inspection checklist for documentation and evaluations.

• Reference applicable ASTM, ACI, and industry guidance related to durability and repair.

Designed For:

• Concrete Inspectors

• Quality Control Technicians

• Ready-Mix Producers

• Contractors & Superintendents

• Engineers & Project Managers

• Facility Owners & Maintenance Personnel

• Concrete Testing Personnel

• Construction Professionals

Whether you're evaluating an aging structure, investigating corrosion-related distress, performing condition assessments, or expanding your concrete knowledge library, this reference provides practical guidance you can apply in the field immediately.

Part of the Concrete Defect Field Reference Series — professional field references designed to help identify, assess, repair, and prevent common concrete defects and durability-related deterioration with confidence.