ACI Certification Study Guide 2026

FM is computed by summing cumulative percentages retained on a specified series of sieves and dividing by 100; higher values denote coarser material.

ASTM C31 is the standard practice for making and curing concrete test specimens in the field; C192 covers laboratory fabrication.

ASTM C172 requires that the first and last 10% of each load be excluded from sampling because these portions may not represent the bulk of the concrete.

A flat plate or piece of plate glass is used in a sawing and rolling motion to create a smooth, level surface on the unit weight container.

ACI 302.1R classifies superflat floors as requiring FF 100 / FL 50 in defined traffic areas; these floors are used in high-bay warehouses with wire-guided or rail-guided forklifts operating at speed.

ACI 318 is the design code (typically adopted by jurisdictions into law) governing structural concrete design; ACI 301 is a reference specification that project owners and engineers incorporate into contract documents to govern construction quality.