TECH NOTES | Brief Case Studies Deterioration of Concrete in Building Materials

Concrete is a very durable building material when properly designed, proportioned and constructed. Unfortunately, deterioration can occur if attention is not paid to detail in the design construction phases of a project. One such situation is that associated with Alkali-Silica Reaction (ASR). ASR is an expansive process in concrete between alkali hydroxides in portland cement and certain forms of siliceous aggregates (or their components) in the presence of moisture. It can lead to significant cracking, structural depreciation and ultimately reduced service-life of a structure.

Case Study #1 Parking Garage

SKA was called to consult on a concrete materials issue shortly after a parking garage was constructed. SKA discovered as part of the review process that known reactive aggregates were used in the concrete without use of pozzolans or other additives to mitigate the effects of ASR. SKA provided guidance to evaluate the likelihood for distress for the particular situation and worked with the team to develop a testing protocol to confirm reactivity and appropriate corrective action in the interest of arriving at an equitable solution.

Click below to learn more about ASR and to get 3 more brief case studies.

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