2.1 JTA as the Exam Blueprint

ACI Concrete Field Testing Technician Grade I Study Guide Exam

Track your progress as you read

Finished sections get a check mark.

1 Orientation: Certification Requirements, Written Exam, Performance Exam, and Study Sources

1.1 Credential Purpose and Official Definition 1.2 Eligibility and the Two-Part Certification Path 1.3 Written Exam Format and Dual Passing Rule 1.4 Performance Exam Format and Grading 1.5 Current Study Sources and CP-1 41st Edition 1.6 Validity, Recertification, and Myth Control

2 JTA, Performance Checklists, Common Fail Points, and Field Mindset

2.1 JTA as the Exam Blueprint 2.2 Written Knowledge Versus Performance Skill 2.3 Performance Checklists and the Six Demonstrations 2.4 Timing, Sequence, and Verbal Description Discipline 2.5 Common Fail Points and Result Recording 2.6 Field Mindset, Exam Habits, and Second Trials

3 ASTM C172: Sampling Fresh Concrete and Field Sample Control

3.1 Representative Sampling Purpose and Exam Role 3.2 Sampling Locations and Middle-Discharge Control 3.3 Composite Sample Timing, Remixing, and Protection 3.4 Sample Size, Large Aggregate, and Wet Sieving 3.5 Sequence With Slump, Temperature, Air, Density, and Specimens 3.6 Performance Exam Verbal Description and Field Habits

4 ASTM C1064 Temperature and ASTM C143 Slump

4.1 ASTM C1064 Purpose, Equipment, and Timing 4.2 Sensor Placement, Stabilization, and Reporting 4.3 Temperature Field Errors and Performance Habits 4.4 ASTM C143 Scope, Equipment, and Setup 4.5 Filling, Rodding, Lifting, and Measuring Slump 4.6 Invalid Slump Results, Reporting, and Integrated Habits

5 ASTM C138: Density, Unit Weight, Yield, and Gravimetric Air

5.1 Purpose, Equipment, and the Calibrated Measure 5.2 Sampling, Filling, and Consolidation Choice 5.3 Strike-Off, Cleaning, Mass, and Density 5.4 Yield, Relative Yield, and Batch Comparison 5.5 Gravimetric Air and Theoretical Density 5.6 Reporting, Validity, and Calculation Traps

6 ASTM C231: Pressure Air Method, Type B Meter, and Aggregate Correction

6.1 Scope, Principle, and When Pressure Air Fits 6.2 Type B Meter Equipment, Calibration, and Setup 6.3 Sampling, Bowl Filling, Consolidation, and Strike-Off 6.4 Type B Sequence: Water, Petcocks, Pressure, and Reading 6.5 Aggregate Correction Factor and Final Air Content 6.6 Reporting, Validity, and Invalid-Result Traps

7 ASTM C173: Volumetric Air Method, Rollameter, Alcohol Correction, and Validity

7.1 Scope, Equipment, and When the Volumetric Method Fits 7.2 Sample, Bowl Filling, Consolidation, and Strike-Off 7.3 Water, Alcohol, Initial Liquid Level, and Sealing 7.4 Inversion, Shaking, Rolling, and Air Release 7.5 Reading Agreement, Out-of-Range Steps, and Invalid Results 7.6 Alcohol Correction, Calculation, Reporting, and Performance Habits

8 ASTM C31: Making and Curing Cylinders and Beams, Initial Curing, and Transport

8.1 Purpose, Sample, Equipment, and Specimen Plan 8.2 Cylinder Molding, Consolidation, Finishing, and Identification 8.3 Beam Molding, Flexural Specimens, and Finishing 8.4 Initial Curing, Protection, Temperature, and Moisture 8.5 Standard Curing, Field Curing, Final Curing, and Interpretation 8.6 Transport, Lab Handoff, Reporting, and Common Failures

9 Integrated Field Workflow: Test Order, Documentation, and Quality Control

9.1 Field Sample to Report Workflow 9.2 Test Order and Parallel Timing 9.3 Documentation and Report Accuracy 9.4 Invalid Results and Retest Decisions 9.5 QA/QC Communication and Acceptance Context 9.6 Contamination, Delays, and Handoff Control

10 Written Exam Strategy: Numerical Values, Calculations, and Category Scoring

10.1 One-Hour Written Exam Pacing 10.2 Category Scoring and the No-Compensation Rule 10.3 High-Yield Numerical Values and Units 10.4 Density, Yield, and Gravimetric Air Calculations 10.5 Air Content Corrections and Validity Checks 10.6 Method-by-Method Practice Plan

11 Performance Exam Strategy: Equipment Setup, Examiner Communication, and Remediation

11.1 Performance Exam Map and Mindset 11.2 Equipment Setup, Station Control, and Safety 11.3 Examiner Communication and Speaking the Work 11.4 One-Step Errors, Timing, and Method Control 11.5 C172 Verbal Description Under Pressure 11.6 Remediation, Retest Planning, and Field Confidence

12 Final Review: Recertification, Career Paths, and Next ACI Credentials

12.1 Two-to-Six Week Final Review Plan 12.2 Final Week and Test-Day Checklist 12.3 CP-1, JTA, and Source Control 12.4 Recertification, Five-Year Cycle, and Re-Exam Requirement 12.5 Career Paths After Field Testing Grade I 12.6 Next ACI Credentials and Growth Map

2.1 JTA as the Exam Blueprint

Key Takeaways Explain This Topic AI

ACI's Job Task Analysis (JTA) lists the knowledge and skills that may appear on the written and performance examinations, so it functions as the official blueprint.

The JTA is organized around seven required ASTM standards: C172/C172M, C143/C143M, C231/C231M, C173/C173M, C138/C138M, C1064/C1064M, and C31/C31M.

Each JTA line should be converted into a study action, a hands-on practice action, or a self-check rather than read passively.

Using the JTA keeps preparation focused on tested procedures and prevents wasted study time on general concrete trivia that ACI does not examine.

Last updated: June 2026

Turning the JTA Into a Study Map

The ACI Job Task Analysis (JTA) is the practical blueprint for Concrete Field Testing Technician Grade I preparation. It lists the knowledge and skills that may be included on the written and performance examinations, and ACI explicitly directs candidates to use it to prepare. Because ACI ties examination content to that analysis, the JTA is not optional background reading; it is the closest thing to an answer key for what you will be asked to know and do.

The JTA is useful because it separates two kinds of competence. First, general concepts such as why representative sampling matters, why fresh-concrete properties change with time, and how each property affects quality control. Second, specific procedures, values, and performance tasks drawn from the seven required ASTM standards. A strong study plan walks the JTA top to bottom and decides, for every line, whether mastery means recalling a fact on the written exam, executing a motion on the performance exam, or both.

The Seven Required Standards

Every item on the JTA traces back to one of the seven ASTM documents the program is built on. Memorizing this list and what each standard governs is the fastest way to structure your study.

Standard Property or Practice
C172/C172M Sampling freshly mixed concrete
C143/C143M Slump
C231/C231M Air content, pressure method
C173/C173M Air content, volumetric method
C138/C138M Density (unit weight), yield, gravimetric air
C1064/C1064M Temperature
C31/C31M Making and curing field specimens

Notice that two air-content standards appear because aggregate type decides which method is valid: C231 (pressure) is for normal-weight concrete, while C173 (volumetric) is the method for lightweight or porous aggregate. The JTA expects you to know not only how to run each method but when each applies. Treat that distinction as a high-yield item, because it is easy to test and easy to miss.

Converting JTA Lines Into Actions

The discipline that separates passing candidates from anxious ones is converting each JTA line into a verb. A JTA entry about slump measurement becomes "practice rodding three equal layers with 25 strokes each and measure to the nearest 1/4 in. within 2.5 minutes." A JTA entry about temperature becomes "recall the minimum cover of concrete around the sensor (3 in.) and the immersion time." A line about sampling becomes "rehearse the verbal C172 description: composite sample, two or more portions, complete within 15 minutes."

A Three-Bucket Method

Recall bucket: facts, thresholds, and numbers for the closed-book written exam.

Procedure bucket: physical sequences you must demonstrate under a certified ACI examiner.

Self-check bucket: items you keep failing, which become your final-week priority.

Working the JTA this way prevents the most common preparation error: studying broad concrete knowledge while neglecting the exact tested steps. The JTA narrows an enormous subject down to roughly seven procedures and their supporting facts, and that focus is precisely what makes a one-month plan realistic.

Mapping the JTA to High-Yield Facts

The JTA is most powerful when you pre-load it with the specific numbers ACI repeatedly tests, so the written questions feel like recall rather than reasoning. Build a one-page reference from the JTA lines and rehearse it until the figures are automatic. The following items are the figures candidates most often confuse, and each one maps to a JTA entry.

JTA topic Tested figure to memorize
Sampling window (C172) First-to-final portion within 15 min
Start of slump/air/temperature Begin within 5 min of final portion
Slump rodding (C143) 3 equal layers, 25 strokes per layer
Slump measurement (C143) Nearest 1/4 in., raise cone in 2-3 s
Temperature cover (C1064) At least 3 in. of concrete around sensor
Pressure air rodding (C231) Equal layers, 25 strokes each, tap sides
Standard cylinder (C31) 6x12 in., 3 layers, 25 rods per layer

A candidate who can recite this table cold has already covered a large share of the written exam's most missed questions. Pair the table with the why behind each figure, since the JTA also rewards understanding the reason a step exists, not just the number.

Using the JTA in the Final Week

In the last days before testing, stop reading new material and instead walk the JTA line by line, marking each item green (solid), yellow (shaky), or red (unreliable). Spend your remaining hours only on yellow and red items. This converts the JTA from a planning tool into a triage tool, and it is the single most efficient way to allocate scarce final-week study time across both the written recall and the physical procedures. A green-yellow-red pass takes only an hour, yet it reliably exposes the two or three items that would otherwise cost you the exam, so repeat it every few days as your weak list shrinks.

The goal of the final week is not to learn anything new; it is to ensure that nothing on the JTA is still marked red on the morning you test, because every red item is a question or a checklist step you are likely to miss under pressure.