Resources
Free study material and jobsite references for concrete pros — practice exams, ASTM test cheat sheets, and calculators.
ACI Concrete Field Testing Technician Grade I Practice Exam
30 questions with instant answer explanations and score tracking. Passing score 70%.
Start practice exam →ASTM field test quick reference
- C143 — Slump: 3 layers, 25 rods, 2 1/2 min, nearest 1/4 in.
- C231 — Air (pressure): 3 layers, 25 rods, nearest 0.25 %
- C1064 — Temperature: 3 in. cover, 2–5 min, nearest 1 °F
- C138 — Density & yield: net mass ÷ volume
- C31 — Cylinders: 4×8 in 2 layers, 6×12 in 3 layers
- C172 — Sampling: middle of batch, 15 min max span
Concrete calculators
Slab, footing, wall, column, rebar, sand and gravel — with PDF export.
Concrete images
Search millions of concrete finishes, textures, and project ideas.