Study guide
1.5 Current Study Sources and CP-1 41st Edition
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
1.5 Current Study Sources and CP-1 41st Edition
Key Takeaways Explain This Topic AI
The current ACI program lists C1064/C1064M-23, C172/C172M-17, C143/C143M-20, C138/C138M-23, C231/C231M-24, C173/C173M-24, and C31/C31M-24 as the governing editions.
ACI's current technician workbook is CP-1, 41st Edition, published in 2025 (ISBN 978-1-64195-301-6).
The ASTM standards are NOT included in the CP-1 workbook; candidates must obtain the official standards separately.
CP-1 contains program information, study questions, sample checklists, and a practice exam.
Use CP-1, the Job Task Analysis, and the official ASTM standards together rather than relying on outdated workbook editions.
Last updated: June 2026
Source Control for Current ACI Facts
Good preparation starts with current source control — studying the exact documents and editions ACI lists today, not whatever workbook a coworker happens to own. ACI's program page lists these governing editions:
- Standard Listed Edition
- C1064/C1064M -23
- C172/C172M -17
- C143/C143M -20
- C138/C138M -23
- C231/C231M -24
- C173/C173M -24
- C31/C31M -24
These editions should drive the study plan unless ACI updates its official page again. ASTM standards are revised periodically, and a value or step can change between editions. Studying an old edition of, say, C231 risks learning a superseded procedure, which is exactly the kind of trap the per-method written floor punishes.
The CP-1, 41st Edition Workbook
ACI's current bookstore product for this credential is CP-1, 41st Edition , the Technician Workbook for Concrete Field Testing Technician—Grade I , published in 2025 (ISBN 978-1-64195-301-6). It is the primary study companion ACI publishes for the program.
What CP-1 contains:
- Program information explaining the certification and its requirements
- Study questions modeled on the written exam style
- Sample performance checklists for the demonstrated procedures
- A practice exam to rehearse the format
What CP-1 does not contain is just as important: the ASTM standards themselves are not included in the workbook. This is a frequent and expensive surprise. A candidate who buys only CP-1 and assumes it reproduces C143 or C231 in full will study from summaries and questions, not the controlling test methods. ACI's product page explicitly states the ASTM standards are not part of the workbook.
Building a Complete Study Set
Because CP-1 omits the standards, a complete study set has three legs:
CP-1, 41st Edition — for study questions, sample checklists, and the practice exam.
The seven official ASTM standards at the listed editions — the authoritative source of every tested step and number.
The Job Task Analysis (JTA) — to confirm that study effort maps to what the exam actually weights.
Why You Still Need the Standards
The written exam tests precise values: rod diameters, layer counts, rodding strokes per layer, tolerances, and timing windows. CP-1 references these, but the definitive wording lives in the ASTM documents , and the performance checklists are derived directly from them. When CP-1 and a recalled rule of thumb disagree, the official ASTM standard at the listed edition wins.
Avoiding Outdated Editions
Used copies of older CP-1 editions (37th, 38th, 40th) circulate widely and are cheaper. They are useful for general familiarity, but they may cite superseded ASTM editions and older checklists. For exam-critical numbers, verify against the current editions ACI lists. Treating an old workbook as authoritative is one of the most common ways candidates memorize a value that is no longer correct.
How to Actually Use Each Source
The three legs of the study set are not interchangeable; each does a different job, and using them in the right order is more efficient than reading everything at once.
Start with the ASTM standard for a given test to learn the authoritative steps, values, and validity rules in their exact wording.
Use CP-1's study questions for that same standard to convert reading into recall and to surface gaps.
Use CP-1's sample checklist to rehearse the physical procedure in the exact step order the examiner will grade.
Take CP-1's practice exam once near the end to rehearse the 55-question, one-hour format and the dual passing rule.
This loop — read the standard, drill the questions, rehearse the checklist — repeated for each of the seven standards, covers both the written and performance sides from the same materials.
Free and Supplemental Resources
Many ACI chapters and DOTs publish review notes, equipment lists, and practice sessions tied to the same seven standards. These are useful for scheduling and hands-on time, but they are supplements , not substitutes for the official ASTM editions. When a handout and the current ASTM standard disagree on a number, the standard wins. Every value you memorize should trace back to a current ASTM edition or the current CP-1, not to an undated handout. Building that habit during study also builds the documentation discipline the credential is meant to certify.
A Reading Order That Saves Time
Candidates often waste effort by reading all seven standards front to back before doing anything else, then forgetting the first by the time they reach the last. A faster loop is to work one standard at a time to completion : read C172, drill its CP-1 questions, rehearse its checklist, then move to C1064, and so on. Each standard is finished — read, recalled, and rehearsed — before the next begins, which fights the forgetting that comes from front-loading all the reading.
When you reach the calculation-heavy standards (C138 for density, yield, and gravimetric air; C231 for the aggregate correction factor), spend extra time working the numbers by hand rather than just reading the formulas. The written exam asks you to compute, not merely recognize, so a formula you have only read is a formula you cannot use under the one-hour clock.
Keeping Sources Current Over Time
Finally, remember that source control is a moving target. ACI revises its program page and CP-1 periodically, and ASTM revises the underlying standards. Before any attempt — first certification or renewal — re-check the current ACI program page for the listed editions rather than assuming last year's set still applies. Verifying them is a five-minute habit that prevents studying a superseded value.