XPR Shotcrete

Uses

In the dry process the Multicrete XPR Shotcrete is blown through the hose and mixing water is added at the nozzle. The shotcrete impacts the surface at a high velocity resulting in a well-compacted, high-quality concrete with excellent bond. Multicrete XPR Shotcrete was specially developed for the following shotcrete applications:

• Areas requiring rapid strength gain (+/-2610 psi in 2 hours – 18 MPa)
• Spraying onto grounds such as structural tunnel linings, and ground support applications including mining, tunneling and other underground openings
• Cold weather use

Multicrete XPR Shotcrete may be used in combination with steel fibre reinforcements to enhance load-carrying capacity and accelerator to provide fast set times. It can be blended to meet ACI 506 gradations #1 or #2

Advantages

Rapid Strength Gain: Multicrete XPR Shotcrete is specially designed to meet the demands of high early strength for structural support which cannot be met with a conventional Portland cement-based product.

Stickiness: Multicrete XPR Shotcrete has vastly improved cohesion characteristics compared to conventional shotcrete; this stickiness saves time and money because:

• Rebound is significantly reduced, resulting in lower material usage
• Sagging and sloughing are eliminated
• Thick layers can be applied in a single pass in both the vertical and overhead orientations without the use of caustic accelerators. This increases shooting efficiency as passing over work two or three times to achieve a certain thickness is no longer necessary

Physical Properties: Silica fume in Multicrete XPR Shotcrete creates a higher strength shotcrete with low permeability and excellent freeze/thaw durability

Additional Performance Options:
• XPR can be accelerated to minimize set-times.
• Can be purchased with or without steel or poly fibers.
• Fiber additions will increase toughness, improve impact resistance, and reduce post crack failures.

Resistance to water washout

Multicrete XPR Shotcrete in the plastic state has tremendous resistance to washout by flowing water. This resistance allows Multicrete XPR Shotcrete to be applied to moderately wet surfaces.

XPR Shotcrete TDS 2026 – V.1