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Engaging Short Course

Short Courses are an excellent training opportunity to learn about new technologies, innovations and practical applications used in today's tunneling and underground construction industry.


Shotcrete in Underground Construction

Sunday, June 11, 2023 | 8:00 am - 4:00 pm | $400 Member | $510 Nonmember

Short courses are an additional ticketed function

Course registration includes:

Lunch and coffee breaks
Course materials


This course is designed to provide a solid understanding of shotcrete for ground support in underground construction. It is intended for industry professionals including owners, engineering students, designers, contractors, consultants, and suppliers involved in the design, planning, and construction of tunneling projects utilizing shotcrete.

  1. Overview of shotcrete
    1. History
    2. Applications
      1. Surface
      2. Underground
    3. Terminology
    4. References/guidelines
  2. Mix Design
    1. Cement/cementitious materials
    2. Aggregate
    3. Admixtures
    4. Air entrainment
    5. Batching
  3. Reinforcement
    1. Rebar
    2. WWF
    3. Fibers
  4. Site considerations
    1. Concrete supply (truck access, site batching and delivery, etc)
    2. Pump or gun locations (double pumps, long drops from surface, through manholes, etc.
    3. Air compressor and water pump locations (wet and dry differences)
  5. Surface preparation
    1. Concrete, soil, rock, masonry
  6. Water control
  7. Equipment
    1. Wet mix
    2. Dry mix
    3. Equipment – Hand
    4. Equipment - Robotic
  8. Placement
    1. Proper Techniques
    2. Hand placement
    3. Robotic placement
    4. Finishing
    5. Curing
    6. Hot Weather
    7. Cold Weather
  9. QA/QC
    1. Test panels
    2. Cores
    3. Pull out testing (bond strength)
    4. Field observations
    5. Qualification panels
    6. Early strength testing
    7. 3D Scanning
  10. Repair and Rehabilitation
  11. Safety
  12. Case studies

Charles Hanskat, American Shotcrete Association Executive Director
Christoph Goss, PhD, PE, PMP, F.ASCE, Senior Associate / Tunnels & Underground, Schnabel Engineering
Lauro Lacerda, Senior Account Manager, Normet Americas, Inc.


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What Attendees Say

Over four decades of conferences, RETC provides both the experienced tunneling professional and the individual just starting in the business the opportunity to stay connected while integrating new ideas and innovations into contracting, design, and construction.

Bill Mariucci
Team Leader, Kiewit infrastructure Co.
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