Shotcrete is a placement method for concrete. Dry-mix shotcrete (the old tradename is gunite) using proper materials, equipment, and application techniques should have easily been able to reach a strength of 4000 psi (28 MPa) in the first month. After 10 years in-place the concrete should be even stronger. The level of concrete strength developed by quality shotcrete should easily accommodate drilling in anchors or concrete screws. In my experience it would have been highly unusual to build an entire 10-story building with shotcrete even in the 1960s. I’d suggest based on the extremely weak material properties and the wall turning to dust what you think is shotcrete may be sprayed plaster or stucco. Those materials don’t have near the same strength as shotcrete and would exhibit many of the problems you have mentioned.
The ASA Buyers Guide provides a detailed listing of the products and services offered by our Corporate Members.
AAA Shotcrete Inc
11024 Balboa Blvd Ste 190, Granada Hills California, 91344 United States
Active Minerals International, LLC
34 Loveton Circle, Suite 100 Sparks, MD 21152 United States
Amelie Construction & Supply, LLC
285 Girty Road, Spring Church PA, 15686 United States
American Concrete Restorations Inc
11S375 Jeans Rd, Lemont IL, 60439-8839 United States
American Standard Concrete Pumping Hawaii Inc
94-400 Koaki St , Waipahu HI, 96797-2874 United States
Aquatic Artists Luxury Pools, Inc.
1260 Manns Chapel Road, Pittsboro NC, 27312 United States
Sustaining Member
Ashlar Structural – A Halmar International Affiliated Company
421 East Route 59, Nanuet New York, 10954-2908 United States
Basalite Concrete Products – Vancouver ULC
8650 130th Street , Vancouver BC, V3W 1G1 Canada
Sustaining Member
Baystate Shotcrete LLC
67 Forest Street Suite 199 #270, Marlboro MA, 01752 United States
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The ASA Buyers Guide provides a detailed listing of the products and services offered by our Corporate Members.
Visit ASA’s Booth in the South Hall #S10919
WOC 2025, the industry’s ONLY annual international tradeshow dedicated to the commercial concrete and masonry construction industries, will take place at the Las Vegas Convention Center, 3150 Paradise Rd, Las Vegas, NV 89109, on January 21-23; Education 20-23. As Co-Sponsors, ASA offers the deepest discounts for Exhibit-Only passes by using our A17 source code when registering. Registrations will open in the Fall. Look at how ASA participated at World of Concrete 2024 below.
ASA SHOTCRETE NOZZLEMAN EDUCATION CLASS
Time: 8:00 am – 4:00 pm
Location: North Hall #N211
Speaker: Oscar Duckworth
Registration code: ASATU
Registration Fee: $450; $485 after 12/12/2023
Attendees will receive: CP-60(15) Shotcrete Nozzleman Craftsman Workbook
This 7-hour program is a requirement for all nozzlemen wishing to pursue certification as an ACI Shotcrete Nozzleman through ASA. However, it also provides a great overview of the shotcrete process for contractors and project managers. This registration includes the required CP60 workbook (available in English or Spanish) and a complimentary 1-year ASA Nozzleman membership. (Registering for this class would also require you to sign up for an Exhibit-Only Pass, available for $25 using ASA’s source code: A17. Class is listed under Association and Industry Training.) Please note: this class alone will not result in certification. Opportunity for Wet-Mix certification is available, see Thursday option below.
Oscar Duckworth
Oscar Duckworth is an ACI Certified Nozzleman and currently an ASA/ACI Examiner for the wet- and dry-mix processes. He currently serves as Secretary on ASA’s Executive Committee and Chair of ASA’s Education & Safety Committee.
ASA WOC 2024 General Membership Meeting & Shotcrete Reception
Time: 5:00 pm – 7:30 pm
Location: TBD
Come hear the latest updates on ASA’s activities and network at our General Membership Meeting and Reception (no registration required).
RECOGNIZING QUALITY SHOTCRETE – (Shotcrete Inspector Education)
Times: 8:00 am – 4:00 pm (course) • 4:00 pm – 6:00 pm (exam)
Location: North Hall #N211
Speakers: Oscar Duckworth & Charles Hanskat
Registration Code: ASAWE (seminar only); ASAWEX (seminar with exam)
Registration Fee: Course only: $450; $485 after 12/12/2023 | Course with exam: $680; $715 after 12/12/2023
With the strong growth of shotcrete construction, the concrete construction industry needs on-site inspectors who are knowledgeable about producing high-quality and durable shotcrete. This one-day session from ASA provides guidance on over 40 critical elements of shotcrete applications to properly evaluate the overall quality of shotcrete – valuable information for onsite inspectors, General Contractors, shotcrete contractors and others who hire shotcrete sub-contractors. Topics covered include material selections, equipment, placement techniques, finishing, curing, protection, testing and safety as it relates to the shotcrete process.
Examinees may purchase direct from ACI (www.concrete.org/store): ACI CP-61Pack – Shotcrete Inspector Reference Package. This is the reference resource permitted for the open book exam, optional for those individuals pursuing the ACI Shotcrete Inspector Certification, and also available at the seminar for an additional charge.
Charles Hanskat
Charles Hanskat, PE, FACI, FASCE, ASA Executive and Technical Director, is also an ASA/ACI Examiner for the wet- and dry-mix processes. Charles also actively serves on a wide range of shotcrete-related committees including ACI and ASTM.
Oscar Duckworth
Oscar Duckworth is an ACI Certified Nozzleman and currently an ASA/ACI Examiner for the wet- and dry-mix processes. He currently serves as Secretary on ASA’s Executive Committee and Chair of ASA’s Education & Safety Committee.
ASA SHOTCRETE NOZZLEMAN CERTIFICATION – Wet Mix
Start Time: 8:00 am
Location: Henderson, NV
Examiner: Oscar Duckworth
Register for this session: WorldofShotcrete.com
Wet-Mix Shotcrete Nozzleman certification available for New, Nozzlemen-in-Training, Recertification, etc.
- 500 hours of shooting experience required for New Nozzlemen
- 25 hours of work experience required for Nozzlemen-in-Training candidates.
- 1000 hours (within the last 2 years) of work experience + oral interview required for recertification candidates to opt out of the written exam.
Full day education is required for New and Nozzlemen-in-Training candidates, (Tuesday seminar noted above). Work Experience forms: https://shotcrete.org/wp-content/uploads/2021/03/ASA_Work_Experience_Form_2021.pdf – send to info@shotcrete,org (Subject line: For World of Concrete)
Performance and written exams offered at this session, register separately: worldofshotcrete.com
- Thursday, January 25th – Henderson, NV | Performance Exams (shooting of panels) start: 8:00 AM
- Friday, January 26th – Henderson, NV | Written Exams – start: 8:00 AM; followed by coring at the yard