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Publication Number: FHWA-RD-01-164
Date: March 2002

Figure C-3

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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.

 

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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