- What the Credential Actually Is (and Its Name Change)
- Who Issues It and Who Delivers the Testing
- The Ten Knowledge Areas on the Written Exam
- Written Exam Format and Passing Standard
- The Two-Part Performance Examination
- Experience Requirements: Full Certification vs. Trainee
- Budgeting: Why There Is No Single Exam Fee
- Five-Year Term and Renewal Pitfalls
- Dry-Mix vs. Wet-Mix: Pick the Right Path
- Sequencing Your Preparation
- Frequently Asked Questions
- This credential is issued by ACI; its current official title is Shotcreter (Dry-Mix Process), formerly called Shotcrete Nozzleman.
- The written exam is closed-book, 60-90 questions in 90 minutes, with a 75% pass requirement.
- Full certification requires 500 verified hours, including 100 per process/orientation and 200 hand-nozzling hours.
- Part II of the performance exam fails if any core grades above 3 or more than two cores grade 3.
What the Credential Actually Is (and Its Name Change)
The ACI Shotcrete Nozzleman (Dry-Mix Process) certification verifies that a craftsman can place dry-mix shotcrete competently, safely, and to the standard the industry expects. Dry-mix shotcrete is a process in which the dry or damp cementitious materials are conveyed through a hose by compressed air, and water is added at the nozzle. That means the person on the nozzle controls the water, and therefore a large part of the quality of the finished work.
One point causes confusion for newcomers: the name. ACI's current official title for this credential is Shotcreter (Dry-Mix Process). The older term "Shotcrete Nozzleman" is a legacy name, and it still appears widely in job postings, training materials, and search results. Industry publications have documented the transition from nozzleman to shotcreter. If you see both names, you are looking at the same family of certification, not two different credentials. This site retains the legacy name because that is what many candidates still search for, but when you register or verify a card, expect to see the current title.
Who Issues It and Who Delivers the Testing
The credential is issued by the American Concrete Institute (ACI). Testing, however, is run through ACI-approved sponsoring groups and examiners rather than directly by ACI staff. The American Shotcrete Association (ASA) is one such delivery sponsor. It is not the issuer, a distinction that matters when you read policies, because sponsors can layer their own scheduling, education, and fee rules on top of ACI's baseline requirements.
ASA's program page also lists a Prometric option for the English written examination. The practical (performance) examination remains separate and must be completed hands-on with an approved examiner. In other words, you may be able to take the written test at a testing center while still needing to attend a session to demonstrate your nozzle skills.
The Ten Knowledge Areas on the Written Exam
ACI's published scope lists ten required knowledge areas, supported by the Job-Task Analysis for ACI Certification of Shotcreter approved April 25, 2025. These are official headings, not a percentage-weighted blueprint, so do not assume any area counts a fixed share of the questions. A full breakdown lives in Shotcrete Nozzleman (Dry-Mix) Exam Domains: Complete Guide to All 10 Content Areas. Here is how each area translates into dry-mix reality:
Domain 1: Basic concrete technology
The foundation for everything else.
- Cement, aggregate, and admixture roles in the mixture
- How water-cement relationships affect strength and durability
- Why dry-mix material moisture and gradation matter at the nozzle
Domain 2: Shotcrete Equipment
Dry-mix specific machinery and its failure modes.
- Delivery equipment, hoses, nozzle components, and the water ring
- Compressed air supply and its effect on velocity and consistency
- Recognizing pulsing, plugging, and wear problems
Domain 3: Environmental conditions and precautions
Weather and site conditions that change placement and curing behavior.
- Hot, cold, windy, and wet conditions
- Protecting fresh placements from the environment
Domain 4: Inspection and preparation of surfaces
Bond depends on what the shotcrete lands on.
- Cleaning, roughening, and moisture conditioning of substrates
- Forms, grounds, and reinforcement layout before placement
Domain 5: Shotcrete placement, principles, and techniques
The heart of the nozzleman's craft.
- Nozzle distance, angle, and movement
- Reinforcement encapsulation and avoiding voids behind bars
- Rebound and overspray: what causes them and how to manage them
- Controlling water at the nozzle for a proper surface appearance
Domain 6: Communication
Dry-mix crews depend on signals between nozzle, delivery equipment, and support personnel.
- Clear start/stop and emergency signaling
- Coordination with the crew and inspector
Domain 7: Finishing and tolerance controls
- Screeding, trimming, and finishing options
- Meeting thickness and line-and-grade tolerances
Domain 8: Safety
- Personal protective equipment and hose-whip hazards
- Pressurized-system risks and safe clearing of plugs
- Dust, silica exposure considerations, and overhead work hazards
Domain 9: Testing/quality
- Test panels, cores, and what they reveal
- Recognizing defects such as sand pockets, laminations, and voids
Domain 10: Curing
- Why early moisture retention protects strength
- Curing methods and timing for fresh shotcrete
Written Exam Format and Passing Standard
The written examination is closed-book and covers the knowledge areas above. The policy permits 60 to 90 questions in 90 minutes, and a score of 75% is required to pass. No single exact question count is assigned within that range, so do not trust any source claiming a precise number. ASA's program page describes the questions as multiple-choice, while the governing policy allows true/false or multiple-choice items. Prepare for both.
The written test measures the Exam line only: knowledge. It does not substitute for the hands-on assessment, and passing it alone does not make you certified. For a closer look at the cut score, see Shotcrete Nozzleman (Dry-Mix) Passing Score: Exactly What You Need to Pass.
The Two-Part Performance Examination
The performance examination is also closed-book and requires vertical dry-mix placement. Overhead placement is an additional certification orientation that you can add if your work requires it. The practical has two parts, and candidates frequently misunderstand how Part II is graded.
| Component | What Is Evaluated | Pass/Fail Standard |
|---|---|---|
| Part I | Workmanship checklist observed during placement | At least 75% on the checklist |
| Part II | Five cores taken from the completed test panel | Fails if any core is graded above 3, or if more than two cores receive grade 3 |
Read the Part II rule carefully. A single core graded above 3 ends the attempt, and a third core at grade 3 does too. Up to two cores at grade 3 can still pass, provided the other cores grade better and none exceeds 3. This is why encapsulation of reinforcement, consistent water control, and clean rebound management matter so much: cores expose the interior of your work, where voids and sand pockets cannot be hidden by surface finishing.
The written exam and both parts of the performance exam must be completed within one year. Schedule accordingly, especially if your sponsor's sessions are infrequent. Difficulty perspectives are discussed in How Hard Is the Shotcrete Nozzleman (Dry-Mix) Exam?
Experience Requirements: Full Certification vs. Trainee
ACI imposes no specific education prerequisite. What it requires is verified work experience, and this is where candidates most often miscount. Full details are in Shotcrete Nozzleman (Dry-Mix) Requirements; the essentials follow.
| Feature | Full Certification | Shotcreter-in-Training |
|---|---|---|
| Verified hours | 500 hours as a shotcreter | At least 25 verified hand-nozzling hours in the process |
| Per-process detail | At least 100 hours in each process and orientation sought | Hours must be in the process |
| Hand-nozzling | At least 200 hours of direct hand-nozzling within the 500 | The 25 hours are hand-nozzling |
| Orientation | Vertical, with overhead available as an addition | Vertical only |
| Upgrade path | Not applicable | Adding 475 qualifying hours can upgrade it, only for the remainder of the original certification term |
Key Takeaway
Do not describe the 500 hours as all hand-nozzling. Only 200 of them must be direct hand-nozzling. The rest can include other qualifying shotcreter work, but you still need 100 hours in each process and orientation you are seeking. Document hours as you go, because verification is required.
Budgeting: Why There Is No Single Exam Fee
Candidates often search for "the" certification cost and expect a single number. There isn't one. The ASA fee schedule currently linked (December 2024) lists component charges, in USD, split by ASA-member and non-member rates:
| Component | ASA Member | Non-Member |
|---|---|---|
| Written examination (per person) | $250 | $360 |
| Vertical performance examination | $120 | $160 |
| Additional overhead performance examination | $120 | $160 |
| Session setup | $800 | $950 |
| Session day | $2,850 | $3,550 |
| Study materials | $70 | $110 |
These are components, not an all-inclusive national candidate fee. Session, equipment, materials, coring, and other applicable costs must be budgeted separately, and session costs are generally shared across the group or employer hosting the test. ASA also requires its own education or refresher training for initial certification and recertification, subject to stated exceptions for retests and orientation additions. That is a sponsor requirement, separate from ACI's education and experience rules. For a fuller walkthrough, read Shotcrete Nozzleman (Dry-Mix) Certification Cost: Complete Pricing Breakdown.
Five-Year Term and Renewal Pitfalls
Certification lasts five years. Renewal generally requires the then-current written and performance examinations plus applicable experience requirements, or an eligible route that combines a structured interview with a performance examination.
For the interview route, ACI requires:
- Prior certification in the same process, issued within six years
- At least 500 work hours in the preceding two years
- At least 100 of those hours in each process and orientation sought
Dry-Mix vs. Wet-Mix: Pick the Right Path
ACI certifies the dry-mix and wet-mix processes separately. Dry-mix certification covers the process where water is introduced at the nozzle; wet-mix is a different process with a different set of equipment and handling concerns. If your employer uses both, you may need to pursue both, and your hours must be documented per process. Choosing your path early prevents wasted hours that do not count toward the process you need. A comparison from an industry perspective is available in World of Shotcrete's article on dry-mix versus wet-mix shotcreter certification, and the career side is covered in Shotcrete Nozzleman (Dry-Mix) Jobs.
Sequencing Your Preparation
The only study structure worth using is one that follows how the credential is tested. Because the written exam is knowledge-based and the performance exam is skill-based, prepare them in parallel but sequence the topics logically. The ASA-linked CP-60 Shotcreter Craftsman Workbook (fourth edition, available in English and Spanish, including CCS-4, Shotcrete for the Craftsman) is the courseware tied to the current program. The public JTA outlines objectives but is not a substitute for the workbook itself.
Concrete technology and equipment
- Domain 1 and Domain 2: water control and delivery behavior explain nearly everything that follows
Surfaces, environment, and placement
- Domains 3, 4, and 5: pair reading with nozzle practice so encapsulation and rebound become habits
Communication, finishing, safety, testing, curing
- Domains 6 through 10: shorter topics that reward careful reading of scenarios
Full review
- Timed practice sets, core-grading rules, and your sponsor's renewal and scheduling rules
For a complete method, see the Shotcrete Nozzleman (Dry-Mix) Study Guide, and for quick last-minute review, the Shotcrete Nozzleman (Dry-Mix) Cheat Sheet. Practice questions with explanations are available at our main practice test.
Frequently Asked Questions
Yes. ACI's current official title is Shotcreter (Dry-Mix Process). "Shotcrete Nozzleman" is the legacy name, still common in the industry and in job postings.
No. The written examination (75% to pass) covers knowledge only. Full certification also requires the two-part performance examination and verified work experience.
Full certification requires 500 verified hours as a shotcreter, including at least 100 hours in each process and orientation sought and at least 200 hours of direct hand-nozzling. The trainee level requires at least 25 verified hand-nozzling hours and is vertical-only.
There is no single all-inclusive fee. ASA lists separate component charges for the written exam, performance exams, session setup, session day, and materials, and equipment, coring, and other costs must be budgeted separately. See the cost breakdown article for details.
Certification lasts five years. Renewal requires the then-current written and performance examinations plus applicable experience, or an eligible structured-interview-plus-performance route. Confirm your sponsor's threshold, since ACI and ASA figures differ.