U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content
Facebook iconYouTube iconTwitter iconFlickr iconLinkedInInstagram

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

Report
This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-RD-01-164
Date: March 2002

Figure II-17

Previous | Table of Contents

Figure II-17: 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.) Are chloro-aluminates or is 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.

 

Previous | Table of Contents

Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101