Method
simply apply each of the two reagents to the broken surface of a concrete core drilled in a suspect structure and rinse off the excess. On ASR contaminated concrete, the resultant stains reveal the presence of ASR.

The stain’s distribution shows the extent of ASR in the concrete, and their proximity to different components of the aggregate gives clues to the source of trouble. The two gels that are identified-one staining yellow, the other pink - indicate the stage of ASR’s progression. Yellow signals that degradation has begun. Pink warns that degradation is advancing.

Typically, ASR occurs in cracks and these cracks often cut through the aggregate and usually do not follow the aggregate-paste boundaries. ASR tends to fill air voids.