SpecShot
High-Performance Shotcrete Repair Mortar
SpecShot is a shotcrete mortar for use in a variety of vertical and overhead repair applications. SpecShot offers superior durability, performance and ease of application in industrial, commercial, and infrastructure (D.O.T.) applications. SpecShot can be applied by dry shotcrete (gunite) method or by mixing with water in a wet mix method.
- One component, just add water
- Low permeability
- Low rebound
- Low shrinkage, for durable repairs
- Concrete-gray in color
- Designed for vertical and overhead repairs
- Contains integral corrosion inhibitor
Application
Surface Preparation
•Ensure the concrete substrate is sound, clean, and free from oil, grease, dust, laitance, or other contaminants.
•Best practice: Saw-cut the perimeter of the repair area and use abrasive blasting to achieve a uniform depth and high surface profile for optimal adhesion.
•The surface should be saturated-surface-dry (SSD) with no standing water before application.
Mixing
•Add potable water at a maximum rate of 10% (7.6 pints per 80 lb. bag).
•Mix thoroughly using standard dry process shotcrete methods.
Placement
•Apply in accordance with ACI 506-R05 “Guide to Shotcrete” for best results.
•Recommended application depth: ½ inch to 6 inches per pass.
•For repairs exceeding 6 inches, apply in multiple layers, cross-hatching the initial layer and allowing it to harden before applying additional layers.
Finishing & Curing
•Finish the repair material to match the surrounding concrete texture.
• Self-curing under most conditions; however, in extreme drying conditions, use an ASTM C309-compliant water-based curing compound.
Packaging
• 80 lb. bags – yields approximately 0.62 cubic feet per bag
•3,000 lb. bulk bags available upon request
Cured Unit Weight: 135 lbs. per cubic foot
Shelf Life
•Shelf life: 12 months in unopened bags, stored in a dry facility.
•Avoid exposure to excessive temperature fluctuations and high humidity, which may shorten shelf life.
•Store in a cool, dry area, away from direct sunlight.
Uses
• Bridge and tunnel repairs
• Parking structure restoration
• Industrial facility maintenance
• D.O.T. infrastructure rehabilitation
• Concrete wall and column repairs
Standards
Setting Time (ASTM C-266)
•Initial Set: ~3 hours
•Final Set: ~5 hours
Compressive Strength (ASTM C-109)
•3 days: 2,000 psi
•7 days: 3,500 psi
•28 days: 5,500 psi
Bond Strength (ASTM C-882)
•7 days: 1,600 psi
Flexural Strength (ASTM C-348)
•7 days: 500 psi
•28 days: 700 psi
Scaling Resistance (ASTM C-672, 50 cycles)
•Result: No scaling
Cleaning
Tools and equipment can be cleaned with water before SpecShot hardens.