Rapid set
Shortens set time to support early stability and faster cycles.
Product Construction Chemicals
Shotcrete Accelerator
Accelerator used in shotcrete for rapid set and build-up — optimized dosage helps improve overhead performance, early strength, and productivity in tunnels, mines, and slope stabilization.
✓ Wet-mix / Dry-mix
✓ Alkali-free / Alkaline options
✓ Drums / IBC / Bulk (lane-dependent)
✓ SDS / COA / TDS on request
Build-up & overhead
Supports higher build rates with controlled sloughing on vertical/overhead surfaces.
Material efficiency
Proper selection and tuning can reduce rebound and waste while improving consistency.
Best results come from trial mixes and nozzle optimization (cement type, temperature, w/b, pump, air, and spraying technique).
What it is
Shotcrete accelerators are admixtures designed to speed up cement hydration at the point of application. They are typically dosed at the nozzle (or in-line) to achieve rapid setting, early strength development, and faster build-up for vertical and overhead spraying.
Where it adds value
- Tunneling: temporary support, sealing, and fast cycle time
- Mining: ground control and rapid stabilization
- Slope stabilization & rockfall protection
- Repair & rehabilitation: overhead/vertical patches and linings
- Specialized works: early stand-up and fast turnaround (spec-dependent)
Early strength
Supports earlier stand-up time and faster return-to-work sequences.
Rebound control
Tuning dosage and nozzle setup can help reduce rebound and dust generation.
Placement stability
Improves cohesion and stability on vertical/overhead surfaces to limit sloughing risk.
Procurement note
We quote against your method, cement system, temperature range, and early strength requirement to avoid under/over-dosing and compatibility issues.
Note: Final performance depends on the complete system (cement/SCMs, aggregates, w/b ratio, fibers, PCE, air, equipment, and curing). Always validate against your project specification.
Grades & selection
We match the accelerator type to your method, cement, and site constraints.
Alkali-free (common)
Often selected under certain site and spec requirements. Typically used for high-performance wet-mix shotcrete systems (cement compatibility dependent).
Focus: rapid set + improved application environment
Alkaline (option)
Used in some established practices and systems. Selection depends on cement chemistry, local standards, and equipment/material constraints.
Focus: set control with traditional systems
Method-tuned viscosity
We supply viscosity grades aligned to pumping/dosing stability and ambient conditions to support consistent nozzle dosing.
Focus: dosing stability + repeatability
Compatibility checklist (practical)
A quick way to avoid onsite surprises.
Cement system
Cement brand/type, alkali level, and SCMs (silica fume, slag, fly ash) can change response.
PCE & admixtures
Superplasticizers and air agents can interact with accelerators. Trial for pumpability + set stability.
Fibers & aggregates
Fiber type/dosage and aggregate grading affect rebound, cohesion, and build-up.
Applications & dosing guidance
Typical shotcrete use cases and performance targets. We align grade and supply format to your process and acceptance criteria.
- Tunnel primary lining, temporary support, sealing layers
- Mine headings, shafts, ground support works
- Slope stabilization, rock surface support, shotcrete facings
- Overhead repairs in bridges, culverts, industrial structures
- Fiber-reinforced shotcrete systems (compatibility dependent)
Practical starting points
Dosage window
Often ~3%–10% by mass of cementitious materials (optimize via trials and project spec).
Addition point
Commonly dosed at the nozzle or in-line just before the nozzle for fast response.
Optimize for
Set time, build-up, rebound, pump stability, and early strength development.
Site variables matter: cement lot, temperature, water control, air pressure/flow, and nozzle technique can shift results significantly.
Typical specifications & commercial supply
Final values depend on grade and customer requirements. Confirm details on quotation (TDS/COA).
Product type
Shotcrete accelerator (alkali-free or alkaline options)
Form
Liquid (viscosity grade per method and temperature)
Packaging
Drums / IBC / bulk (lane-dependent)
Key controls
Density, pH, solids/activity, alkali content (where applicable)
Chloride
Low-chloride options available (confirm per project spec)
Reference standards
Commonly aligned to EN 934-5 / ASTM C1141 (as required)
Documentation pack (typical)
Procurement-ready set for QA/QC and site acceptance.
SDS
Handling, PPE, storage, and transport information.
TDS
Dosage guidance, compatibility notes, and application recommendations.
COA
Batch-specific values where applicable.
Lead time
Depends on grade, origin, and lane capacity. We quote lead time with your required documentation and packaging.
Incoterms
Available per inquiry (e.g., EXW / FCA / FOB / CFR / CIF). Share destination port/city for routing.
Quality routing
We align product grade to spec and provide supporting docs on request (SDS/TDS/COA).
Specifications may vary depending on batch, origin, and packaging selection. Final acceptance criteria should follow your project specification and verified trial results.
FAQ
Quick answers for procurement and site planning.
How is it dosed?
Typically at the nozzle or in-line just before the nozzle. We match viscosity and dosing guidance to your method and ambient conditions.
Will it affect strength or durability?
It can influence early strength and long-term performance depending on dosage and mix design. Trial panels/cores confirm the right balance for your acceptance criteria.
What else improves shotcrete performance?
Good aggregate grading, water control, silica fume, fibers, and compatible PCE can improve pumpability, cohesion, build-up, and durability.
What information do you need to quote accurately?
Method (wet/dry), cement type and SCMs, temperature range, set/early strength targets, current admixture package, volume, packaging, destination, and required documents (SDS/COA/TDS).
Do you supply samples?
Sample availability depends on lane and destination. Include your trial schedule and delivery address in the inquiry so we can advise options.
What packaging is available?
Commonly drums and IBCs; bulk may be possible depending on lane and destination. Tell us your unloading/handling setup and preferred packaging.
Fast-track your quote
Send method + cement + temperature + target set/early strength + volume + destination. We’ll respond with the best-fit grade and a trial-oriented starting point.