When should a concrete load be rejected or redirected due to quality issues?

When should a concrete load be rejected or redirected due to quality issues?

• A. If the slump is very high.
• B. If the load fails to meet essential properties (slump, temperature, air content, or other critical criteria) and cannot be corrected on site.
• C. If the color is not as expected.
• D. If the load is slightly cooler than the project temperature and within tolerance.

Answer: (B)

Fresh concrete must meet the specified properties for performance and durability, and if a load fails to meet essential criteria such as slump, temperature, or air content—and those deficiencies cannot be corrected on site—you should reject or redirect the load. This ensures the concrete will behave as designed in the structure. Color is cosmetic and does not affect strength or durability, and a temperature reading within the project’s allowed range is acceptable. A very high slump might indicate a problem, but it can often be addressed or corrected on site before placement; only when the essential properties cannot be brought within spec should rejection or redirection occur.

Fresh concrete must meet the specified properties for performance and durability, and if a load fails to meet essential criteria such as slump, temperature, or air content—and those deficiencies cannot be corrected on site—you should reject or redirect the load. This ensures the concrete will behave as designed in the structure. Color is cosmetic and does not affect strength or durability, and a temperature reading within the project’s allowed range is acceptable. A very high slump might indicate a problem, but it can often be addressed or corrected on site before placement; only when the essential properties cannot be brought within spec should rejection or redirection occur.