Which case triggers “additional” testing, per the key (strength < 85% of specified f꜀′ in the sheet)?
Choices
- (A) Compressive < 85% of specified f꜀′
- (B) High air content
- (C) Lightweight concern
- (D) Slump under minimum
Correct answer: (A)
Compressive < 85% of specified f꜀′
Explanation
Key: 85% strength threshold per source; confirm with the edition used on site.