Petrographic examination uses microscopic analysis of concrete samples to identify the materials, internal structure, and causes of deterioration or failure. C3S evaluates cracks, air voids, aggregate-paste interaction, chemical reactions, and other defects using recognized methods, including ASTM C856.

Cement chemistry plays a critical role in understanding concrete performance, durability, and failure. C3S evaluates cement composition, hydration products, and chemical interactions within concrete to determine how cement-related conditions may contribute to cracking, deterioration, strength loss, or other forms of distress.

Fly ash is a widely used supplementary cementitious material that can significantly influence concrete strength, durability, workability, and long-term performance. C3S evaluates fly ash characteristics and its interaction with cement and other concrete components to determine whether the material is performing as intended and whether it may be contributing to concrete distress.

C3S uses a combination of established laboratory and forensic testing methodologies to evaluate concrete materials, identify internal defects, characterize chemical and mineralogical composition, and determine the mechanisms responsible for deterioration or failure. The appropriate testing program is selected based on the condition of the concrete and the specific questions that need to be answered.

C3S uses applicable ASTM standards and established testing procedures to support laboratory testing, concrete evaluation, and forensic investigations. This resource provides a convenient reference to commonly applicable standards, with links to the official ASTM source for detailed requirements and procedures.

Explore technical publications, research, case studies, and educational resources from C3S and Dr. S. Ebow Coleman. These resources provide practical insight into concrete materials, forensic investigation, testing methodologies, engineering standards, and the evaluation of concrete failures.