Shotcrete and Its Potential Applications On Ontario Construction
Shotcrete and Its Potential Applications On Ontario Construction
Shotcrete and Its Potential Applications On Ontario Construction
Applications on Ontario
Construction Projects
Webinar
September 19th, 2018
Housekeeping
45 minute webinar with 15 minutes Q & A
All attendees are muted
Questions? Use ‘Questions’ Pane
Webinar will be recorded and posted on the Concrete
Ontario YouTube channel. www.ConcreteOntario.org
Presenter
Ryan Regier, MASc., EIT
Contracts Manager
HCM Shotcrete
RyanR@hcgroup.ca
Civil Engineering Degree
Structural Graduate Degree
• SHM Reinforced Concrete Bridges
5+ years of Heavy Civil PM Experience
Webinar Outline
• Definition of Shotcrete
• History of Shotcrete
• Shotcrete Processes
• Shotcrete Specification
• What’s in the mix?
• Applications of Shotcrete
• Shotcrete Advantages
Definition of Shotcrete
• ACI CT-13 Concrete Terminology:
“Concrete placed by a high
velocity pneumatic projection
from a nozzle.”
Elevation view
Shotcrete Placement
Correct Method
Incorrect
Shotcrete Placement – Typical Set-up
Shotcrete Placement – Typical Set-up
Shotcrete Placement – Typical Set-up
Shotcrete Placement – Typical Set-up
Shotcrete Placement – Typical Set-up
Shotcrete Specification
• ACI 506R - Guide to Shotcrete • OPSS 931 Structure Rehabilitation
- Shotcrete
Shotcrete Specification
• Environmental Conditions
• Surface Preparation
• Reinforcement
• Shotcrete Mix Components
• Quality Assurance
• Shotcrete Application
• Finishing and Curing
Shotcrete Specification
• What’s in the Mix
• Cement Content: shotcrete mixes are typically high cementitious mixes
(420kg/m3to 450kg/m3) with silica fume.
• Water to Cement Ratio: due to the nature of placing shotcrete, mixes are
typically designed with a low water to cement ratio (maximum 0.5) to
maintain a high degree of plastic material cohesion.
Shotcrete Specification
• What’s in the Mix
• Aggregate: Shotcrete differs from conventional mixes in aggregate makeup.
• Shotcrete mixes contain relatively high volumes of sand (40% to 60% volume/volume
shotcrete) and moderate volumes of course aggregate (10% to 20% volume/volume
shotcrete).