ACI Field Testing I study plan
ACI Field Testing I · Give each week a clear focus.
8 weeks · About 6 hours per week
Sampling Freshly Mixed Concrete & Temperature of Freshly Mixed Concrete
Execute the full sampling sequence - obtain, remix, and reduce - on a practice batch and verbalize the reason for each action as you take it
Determine the minimum sample volume required for slump, air content, density, and strength specimens, and state the consequence of undersizing each one
Measure the temperature of freshly mixed concrete with a calibrated thermometer using the correct immersion depth, minimum immersion time, and reading interval
Identify the field conditions that invalidate a temperature reading and describe the corrective action for each
Your checkpoint
A one-page sampling and temperature checklist written from memory, then scored against the written procedure with zero critical omissions.
Slump of Hydraulic Cement Concrete & Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
Perform a slump test start to finish with correct mold filling, rodding pattern, lift timing, and measurement to the nearest 5 mm (1/4 in.)
Distinguish a true slump from a shear slump and a collapse, and state when the result must be discarded and the test repeated
Calculate density, yield, cement content, and gravimetric air content from a given set of field masses and mold volumes
Compare the computed yield against the design yield and decide whether the batch falls within the acceptance tolerance
Record all slump, density, and yield values on a field data sheet with correct units and significant figures
Your checkpoint
A worked calculation sheet containing two complete density/yield/air problems solved to within 1% of the reference answer, plus one fully documented slump record.
Making and Curing Concrete Test Specimens in the Field
Collect and remix a representative sample, then mold standard cylinders using the correct number of layers, rod strokes, and strike-off technique
Apply the proper consolidation method for the measured slump and identify when vibration replaces rodding
Label, protect, and transport specimens so that initial curing temperature and moisture requirements are met
Complete a curing log that tracks specimen identity, initial and final curing conditions, and test date
Your checkpoint
A complete specimen log for six molded practice cylinders with every field filled in and no missing traceability data.
Capping and Compressive Strength Testing of Cylindrical Specimens
Prepare cylinder ends by capping so that the cap is perpendicular to the axis and within the allowed thickness and planeness limits
Select the appropriate capping material or pad for a given strength range and justify the choice
Compute compressive stress from the recorded peak load and measured diameter, and apply the correct unit conversion
Classify the mode of fracture for a tested cylinder and state whether the result is acceptable
List the machine verification checks that must be confirmed before a test result is considered valid
Your checkpoint
Two fully worked strength calculations with fracture-pattern classification, plus a cap-acceptance checklist applied to four practice specimens.
Air Content of Freshly Mixed Concrete by the Pressure Method
Zero and calibrate a pressure-type air meter and confirm that the gauge holds pressure without decay
Determine the aggregate correction factor for a given aggregate combination and apply it correctly to the meter reading
Perform the complete pressure-method test on a prepared sample, recording initial and final pressure readings
Troubleshoot at least five common causes of erratic or inconsistent pressure-meter results and describe the fix for each
Your checkpoint
An aggregate correction factor worksheet for two aggregate combinations plus a completed pressure-meter field data sheet with the corrected air content shown.
Air Content of Freshly Mixed Concrete by the Volumetric Method
Perform the volumetric air-content test with correct reagent addition, pressure vessel agitation, and reading technique
Convert the volumetric reading into an air content value and determine whether it meets the specified tolerance
Compare pressure-method and volumetric results on the same sample and explain any discrepancy larger than the permitted difference
State the restrictions that make the volumetric method unsuitable for certain concretes, such as those with lightweight or highly porous aggregate
Your checkpoint
A side-by-side comparison table of pressure and volumetric air results on the same simulated mixture, with every difference greater than 0.5% explained in writing.
Slump of Hydraulic Cement Concrete & Air Content of Freshly Mixed Concrete by the Pressure Method & Air Content of Freshly Mixed Concrete by the Volumetric Method
Trace how sample handling and remixing affect measured slump and air content, predicting the direction of bias for each error
Build a retest plan for a scenario in which air content is within specification but early strength is low
Reproduce from memory the air content acceptance limits for each exposure class and the tolerances that apply to slump
Explain how aggregate correction factor errors propagate into the reported air content and how to detect them
Your checkpoint
A troubleshooting decision tree covering eight field error scenarios, each with a detection step, a correction, and the record that must be kept.
Sampling Freshly Mixed Concrete & Temperature of Freshly Mixed Concrete & Slump of Hydraulic Cement Concrete & Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete & Air Content of Freshly Mixed Concrete by the Pressure Method & Air Content of Freshly Mixed Concrete by the Volumetric Method & Making and Curing Concrete Test Specimens in the Field & Capping and Compressive Strength Testing of Cylindrical Specimens
Complete two full-length timed practice exams under exam-day conditions
Review every missed item and write the underlying rule or calculation that caused the error
Recompute the numerical items from domains 4, 5, and 8 without reference material until each is correct twice in a row
Recite the field procedures for all eight domains in sequence from memory as a final retention check
Your checkpoint
A written error log for every missed question across both practice exams, with each error traced to a specific rule and re-tested.
Milestones
Week 2: Score at least 80% on a 15-question closed-note quiz on sampling, temperature, and slump, and complete a slump test with no procedural errors observed.
Week 4: Score at least 80% on a 25-question cumulative quiz covering domains 1, 2, 3, 4, 7, and 8, and solve both density/yield and compressive-strength problems correctly without notes.
Week 6: Score at least 85% on a 20-question quiz covering all three air-content methods and compute a corrected aggregate air content in under 10 minutes.
Week 8: Score at least 85% on two full-length timed practice exams, including one closed-note attempt, with a completed error log for every missed item.