U.S. Department of Transportation
Federal Highway Administration
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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
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Publication Number: FHWA-RD-01-164
Date: March 2002
Figure C-3: Flowchart. Flowchart for identifying infilling materials in cracks and voids. To identify the infilling materials in cracks and voids, answer the following questions and follow the indicated steps using the results of staining techniques using a petrographic microscope and/or SEM analysis.
1.) Are sulfates present?
2.) Is chloro-aluminates or are calcium hydroxide present?
3.) Is calcite or are magnesium silicate hydrates present?
4.) Are alkali-silica reaction products present?
5.) Is iron oxide present?
6.) Are other substances present?
For information about corrosion of embedded steel, see table C-1. For sulfate
attacks, see table C-4, deicer attack C-5, alkali-silica reactions C-6, and
alkali-carbonate reactions C-7.
Topics: research, infrastructure, pavements and materials
Keywords: research, infrastructure, pavements and materials
TRT Terms: research, facilities, transportation, highway facilities, roads, parts of roads, pavements, Concrete--United States--Testing, Pavements, Concrete--United States--Maintenance and repair, Concrete pavements, Portland cement concrete, Pavement distress