Portal: General

ASA Conventions provide a unique opportunity to network with leaders in the industry and hear the latest advances in shotcrete technology! This year we will have three tracks, including tracks for Pools and Underground presentations respectively.

3 Reasons to Sponsor:

1. Support the work of the Association as we seek to expand and advance global utilization of the shotcrete process for concrete placement.
2. Promote your company as a stakeholder in Quality Shotcrete applications.
3. Opportunity to EXHIBIT your company at the Convention as one of our tabletop exhibitors, co-located with included meals and breaks at the Convention

Sponsorship Options

Sponsorship – Big Shooter

$5,000 (No Shipping)

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Sponsorship – Gold

$2,500 (No Shipping)

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Sponsorship – Silver

$1,000 (No Shipping)

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Email your logo & preferred web link to [email protected]; Include in the subject line: 2025 Sponsor

*Those who wish to exhibit must register attendee separately (to staff your exhibit table) here: www.shotcrete.org/convention

Once you have made your selections, click the button below to finish the process.

ASA Conventions provide a unique opportunity to network with leaders in the industry and hear the latest advances in shotcrete technology!

3 Reasons to Sponsor:

1. Support the work of the Association as we seek to expand and advance global utilization of the shotcrete process for concrete placement.
2. Promote your company as a stakeholder in Quality Shotcrete applications.
3. Opportunity to EXHIBIT your company at the Convention as one of our tabletop exhibitors, co-located with included meals and breaks at the Convention

---

Sponsorship Options

Sponsorship – Big Shooter

$5,000.00 (no shipping)

Sponsorship – Gold

$2,500.00 (no shipping)

Sponsorship – Silver

$1,000.00 (no shipping)

Email your logo & preferred web link to [email protected]; Include in the subject line: 2025 Sponsor

*Those who wish to exhibit must register attendee separately (to staff your exhibit table) : Registration will open in October 2024, check here for updates: www.shotcrete.org/convention

Once you have made your selections, click the button below to finish the process.

RESORT INFORMATION

Resort Map

For an overview of Ojai Valley Inn, please see the property map here.

Health & Safety Information

For the complete list of Health and Sanitation Standards at Ojai Valley Inn, please see here. Procedures and guidelines will be updated and modified as new regulations are developed.

If you have any questions, please contact Concierge at (805) 646-111 extension 51.

Things to Do

• Restaurants
• Activities
• Golf
• Tennis
• Shopping
• Spa

Ojai Trolley Service

The Inn is pleased to offer the Ojai Trolley Service to guests. Reminiscent of a bygone and relaxed era, guests may take a leisurely trip downtown to enjoy eclectic shopping, wine tasting, art galleries and farm-to-table eateries.

Saturday and Sunday, the trolley picks up our guests every other hour.

SESSIONS

Fly Ash Supply Today and Tomorrow

Tom Adams

The demand for fly ash and other supplementary cementitious materials (SCM) has been growing for some time and is expected to continue to grow as the demand for increased durability of concrete structures grows. At the same time, the increased use of SCM is an important part of the efforts to reduce the carbon footprint of concrete mixtures. This presentation will focus on today’s energy market realities and efforts to close the gap between supply and demand.

Underground Shotcrete in Remote Alpine Areas

Christoph Goss

One of the most challenging environments for shotcrete work is underground at high altitude in very remote areas. Access limits the size of equipment, compressors must be oversized, and material is difficult to get and mix. This presentation will use two case studies to illustrate these challenges and how they were addressed: Rio Grande Reservoir Outlet Rehabilitation and Gold King Mine 7 Level re-support. Both projects feature shotcrete used as ground support in tunnels and portals. The presentation will conclude with recommendations and lessons learned. 

Clear Vision: Integral Dust Reduction in Dry Mix Shotcrete Mixes

Thomas Brennan

Given its impact on construction site safety, dust exposure is a key consideration on almost any jobsite. Continued increases in OSHA regulations around allowable exposure to airborne particulates has impacted the tools and procedures required for dust-heavy construction work activities. Because concrete repair projects commonly involve dusty activities in confined spaces, additional planning and precaution must be taken to counteract dust generated from any applicable repair activities. Given all these considerations, manufacturers and installers of pre-packaged dry-mix shotcrete have been challenged with developing materials and methods for mitigating dust on a traditionally high-dust activity.

Plasma Tunnel Boring Shotcrete Lining

Troy Helming

Attendees will learn about how shotcrete can be used to quickly line tunnels of 2.5 meters to 10 meters in diameter. While the testing done thus far is preliminary, modified formulations of shotcrete allow for rapid curing by taking advantage of the inherent heat of up to 80 degrees Celsius in the tunnel walls after the hot plasma (temps in the plume of up to 6,000 degrees C) has bored the tunnel. 

Inspection and Selection of Shotcrete Delivery System

Michael Cetnar

In our discussion we will talk about choosing the proper hose, pipe, and clamps for your project.

1. How do we determine the proper delivery system to use?
2. We will discuss the advantage of heat treated parts vs non heat treated parts.
3. What are the differences between wire and fabric shotcrete hose?
4. Choosing the right clamps for your delivery system.
5. How do we inspect our delivery system?
6. What do we look for in hose inspection?

• What do we look for in pipe, elbow and reducer inspection?
• What tools should we use during these inspections?

1. What safety publications are out there that we need to be aware of? (ASME B30.27 and CSA Z151) 

Robotic Shotcrete Placement – Key Issues & Certification Panel

Oscar Duckworth, Christoph Goss & Frank Townsend

Questions & Discussions Session

Development of a New Dry-mix Shotcrete Nozzle Assembly

Marc Jolin

This presentation will introduce a new nozzle assembly design for dry-mix shotcrete developed at the Shotcrete Laboratory in Université Laval. Attendees will learn how basic placement mechanisms play a fundamental role in the formation of rebound and dust during placement. Following a clear description of the testing protocols for rebound losses and dust emissions, laboratory test results based on various mixture design will be presented for various features of the new nozzle assembly. The results show not only a marked rebound and dust reduction, but also demonstrate improved in-place compressive strengths.

Courthouse Commons Tunnel

Sam Lo Grasso

The Courthouse Commons Tunnel located in San Diego; California is a 327ft long tunnel that provides a safe means for transferring prisoners from the San Diego County Jail to new State Courthouse. The tunnel was constructed using an observational excavation method that utilized shotcrete for the initial ground support in conjunction with lattice girders, canopy tubes and spiles. The final lining was cast in place concrete designed for seismic conditions. This presentation will focus on the design and application of the shotcrete in the encountered ground conditions and the challenges that were overcome to achieve a successful project outcome.

Gaining Market Acceptance & Approvals for Structural Shotcrete

Ross King

1. Present a few examples of projects from different sectors where we used Innovative Structural Shotcrete solutions and were accepted and approved.
2. Discuss the incentives and advantages we used to push for Structural Shotcrete as an alternate with the client, prior to even being considered for consultant approval.
3. Strategies used to convince the designers and make them more comfortable with the process, and the finished product.
4. Discuss the barriers to acceptance that are thrown at the Shotcrete process from many different directions by different parties.
5. Where I see the future trends, and the potential to use these approvals and successes to further grow the Structural Shotcrete market.

Construction of Thick, Heavily Reinforced Underground Station Walls Using Low Heat of Hydration 70% Slag Shotcrete at Mount Pleasant Station on the Eglinton Crosstown LRT Project in Toronto, Canada

Shaun Radomski

Mount Pleasant Station on the Eglinton Crosstown LRT Line in Toronto used a low heat of hydration 70%

slag shotcrete for construction of 1.5 m thick, heavily reinforced underground station walls. This

presentation provides details of this work, including:

1. Structural wall design
2. Shotcrete performance requirements;
3. Qualification of mixture design and nozzlemen in shooting full-scale mockups;
4. Shotcrete equipment set-up and staging;
5. Shotcrete construction sequencing, productivity and challenges to overcome while shooting the work;
6. Shotcrete Supply, pumping, application, finishing, curing
7. Rigorous quality inspections, compressive strength tests and thermal monitoring records; and
8. Completed station walls.

Shotcrete vs Low Velocity Sprayed Mortar (LVSM): What are the differences?

Christine Poulin & Marc Jolin

Shotcrete is a well-accepted method for the placement of concrete, and it offers specific advantages in the repair industry where the high material velocity allows for placement of a well compacted concrete layer, even in the presence of reinforcing bars. Some job sites have however seen the use of low velocity sprayed mortar (LVSM) for concrete repairs, and the very limited technical information available on the performance of repair systems using LVSM led to a research project to evaluate its capacity to achieve good adhesion with the substrate and proper reinforcing bar encapsulation. The objective of the presentation is therefore to present and discuss the differences between LVSM and shotcrete based on sound technical results collected during a master’s project conducted in the Shotcrete Laboratory at Université Laval. 

Innovative Tunnel Solutions for Underground Infrastructure Projects

David Rheault

Public transit infrastructure expansions are notoriously challenging. While many projects envision Tunnel Boring Machines (TBM) and open-cut excavations, other construction approaches become preferable as owners begin to appreciate the total cost of construction. The Sequential Excavation Method (SEM) has provided efficiency and flexibility in constructing underground stations and connection tunnels throughout North America. Eglinton Crosstown LRT and Highway 401 Rail Tunnel projects in Toronto, Canada will be highlighted with particular attention to the benefits of fiber-reinforced shotcrete linings with advanced numerical modeling, testing, and construction aspects. The SEM designs successfully optimized shotcrete performance and eliminated conventional bar reinforcement needs.