Figure 3-70

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Flowchart for assessing general concrete properties based on visual examination as applied to CA-058-141. 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 the Boron, California site, visual examination showed that 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;
• Surface cracking occurring but was not characterized as plastic shrinkage cracking; and
• No paste carbonation at depths greater than 5 to 10 millimeters.