ACI Certification
Concrete Field Testing Technician Grade I
Fresh Concrete
Reference book
https://drive.google.com/file/d/11XlU81RjzufAc1t78hKoBbINocOOtnt5/view?usp=sharing

ASTM
https://drive.google.com/drive/folders/1wZbFfNlbwcqtBCkz0YGHz3Dm88-fuPx9?usp=drive_link
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