Figure 3-42: Flowchart.

Flowchart for assessing general concrete properties based on visual examination as applied to MN-065-064. This flowchart from Volume 2 of the guidelines shows how to use visual examination of the concrete to determine if the paste aggregates need to be further evaluated. For this site, visual examination showed that the concrete met the following conditions that led to examination of the paste and the aggregate:

• Volumetrics were mixed as specified;
• Concrete was well-consolidated;
• No segregation or parallelism of the aggregates;
• No scaling or sub-parallel cracking at the road surface;
• Adequate concrete cover over the steel;
• No entrapped water voids under the aggregate at the road surface;
• No surface cracking; and
• No paste carbonation at depths greater than 5 to 10 millimeters.
  

Previous | Table of Contents | Next

TFHRC Home | FHWA Home | Feedback United States Department of Transportation - Federal Highway Administration