High-Performance Concrete Accelerator for Shotcrete, Tunneling and Mining Applications
Fast Setting • Early Strength Development • Reduced Rebound • Chloride-Free Solutions
InnoNew Concrete Accelerator is a specialized concrete admixture designed to accelerate cement hydration, significantly shorten setting time, and improve early-age strength development. It is widely used in shotcrete, tunnel construction, underground mining, slope stabilization, hydropower projects, and infrastructure applications where rapid support and fast strength gain are critical.
Our concrete accelerator solutions are available in both powder and liquid forms and can be customized according to project requirements, cement systems, climate conditions, and construction methods.
Why Choose InnoNew Concrete Accelerator?
Modern construction projects require faster construction cycles, improved safety, and higher productivity. Concrete accelerators help contractors achieve these goals by optimizing the setting and hardening process of cementitious materials.
Faster Initial Setting
Accelerates the setting process of concrete and shotcrete, allowing faster project progress and reduced downtime.
Enhanced Early Strength Development
Improves early compressive strength, enabling quicker load-bearing capacity and structural support.
Reduced Shotcrete Rebound
Improves adhesion and cohesion, reducing material waste and improving spraying efficiency.
Improved Construction Safety
Provides rapid stabilization in tunnels, mines, and underground construction environments.
Compatible with Multiple Cement Systems
Suitable for Ordinary Portland Cement (OPC), blended cement, sulfate-resistant cement, and other commonly used cement systems.
Flexible Application Options
Available for both wet-mix and dry-mix shotcrete applications.
What Is Concrete Accelerator?
Concrete Accelerator is a chemical admixture formulated to increase the hydration rate of cement and shorten both initial and final setting times.
By accelerating the formation of hydration products during the early stages of cement hydration, concrete accelerators help achieve rapid strength development while improving the efficiency of construction operations.
Concrete accelerators are commonly used in applications requiring:
- Rapid support after excavation
- Fast-track construction schedules
- Low-temperature concreting
- Underground engineering projects
- Emergency repair works
- Sprayed concrete (shotcrete) systems
How Concrete Accelerator Works
During normal cement hydration, cement particles gradually react with water to form calcium silicate hydrate (C-S-H) gel and other hydration products responsible for strength development.
Concrete accelerators enhance this process by:
- Increasing the dissolution rate of cement particles
- Promoting rapid formation of hydration products
- Shortening the dormant hydration period
- Accelerating early-age strength development
- Reducing setting time
Hydration Process
Cement + Water
↓
Accelerator Activation
↓
Accelerated Hydration Reaction
↓
Rapid Formation of Hydration Products
↓
Faster Setting & Early Strength Gain
This mechanism makes concrete accelerators particularly valuable in shotcrete applications where immediate adhesion and support are required.
Types of Concrete Accelerators
Alkali-Free Concrete Accelerator
Alkali-free accelerators are increasingly used in modern tunnel and mining projects due to their excellent long-term strength retention and improved working environment.
Benefits
- Reduced dust generation
- Lower rebound rates
- Better durability
- Improved worker safety
- Higher long-term strength retention
Recommended Applications
- Railway tunnels
- Metro projects
- Underground mining
- Hydropower tunnels
Low-Alkali Concrete Accelerator
Low-alkali accelerators offer an effective balance between performance and cost efficiency.
Recommended Applications
- General shotcrete projects
- Infrastructure construction
- Slope stabilization
Powder Concrete Accelerator
Advantages
- Easy transportation
- Lower logistics costs
- Suitable for dry-mix shotcrete systems
- Long storage stability
Liquid Concrete Accelerator
Advantages
- Accurate dosing
- Rapid dispersion
- Excellent compatibility with wet-mix shotcrete equipment
- Consistent performance
Technical Specifications
| Item | Specification |
|---|---|
| Product Type | Powder / Liquid |
| Appearance | Powder or Liquid |
| Color | Light Yellow to Brown |
| Density (Liquid) | 1.30–1.45 g/cm³ |
| pH Value | 2.5–8.0 |
| Chloride Content | ≤ 0.1% |
| Solubility | Fully Dispersible |
| Recommended Dosage | 3–10% of Cement Weight |
| Application Method | Wet-Mix & Dry-Mix Shotcrete |
| Shelf Life | 12 Months |
Actual specifications may vary according to customized formulations.
Recommended Dosage
The optimal dosage depends on cement type, ambient temperature, project requirements, and desired setting performance.
| Application | Recommended Dosage |
|---|---|
| Wet-Mix Shotcrete | 4–8% |
| Dry-Mix Shotcrete | 3–10% |
| Tunnel Construction | 5–8% |
| Underground Mining | 5–8% |
| Slope Stabilization | 4–7% |
| Emergency Repair Concrete | 3–6% |
Dosage Optimization
For maximum performance, laboratory testing and on-site trials are recommended before large-scale application.
Applications of Concrete Accelerator
Tunnel Construction
Provides immediate ground support after excavation and improves tunnel construction efficiency.
Typical Projects
- Railway tunnels
- Highway tunnels
- Metro systems
- Water diversion tunnels
Underground Mining
Rapid shotcrete hardening helps stabilize rock surfaces and improve operational safety.
Benefits
- Faster support installation
- Reduced downtime
- Enhanced worker protection
Slope Stabilization
Improves shotcrete adhesion on vertical and inclined surfaces while reducing rebound loss.
Hydropower Projects
Supports fast construction schedules and efficient tunnel lining operations.
Infrastructure Construction
Suitable for bridges, retaining walls, underground structures, and emergency repair projects.
Concrete Accelerator Selection Guide
Choosing the correct accelerator depends on construction method, project requirements, and environmental conditions.
| Project Requirement | Recommended Solution |
|---|---|
| Wet-Mix Shotcrete | Liquid Accelerator |
| Dry-Mix Shotcrete | Powder Accelerator |
| High-Speed Railway Tunnel | Alkali-Free Accelerator |
| Metro Construction | Alkali-Free Accelerator |
| Underground Mining | Alkali-Free Accelerator |
| Cold Weather Construction | High-Efficiency Accelerator |
| Cost-Sensitive Projects | Low-Alkali Accelerator |
Compatibility with Cement Systems
InnoNew Concrete Accelerators are designed for compatibility with a wide range of cementitious materials.
Compatible Materials
- Ordinary Portland Cement (OPC)
- Rapid Hardening Cement
- Sulfate Resistant Cement
- Composite Cement
- Fly Ash Blended Cement
- Slag Cement Systems
Important Notice
Because cement composition varies by manufacturer and region, compatibility testing is recommended before full-scale production.
Packaging & Storage
Packaging Options
| Product Form | Packaging |
|---|---|
| Powder | 25kg Kraft Paper Bag |
| Powder | Jumbo Bag Available |
| Liquid | 250kg Drum |
| Liquid | 1000kg IBC Tank |
| Liquid | Bulk Tank Delivery |
Storage Conditions
- Store in a dry and ventilated environment.
- Protect from direct sunlight and freezing temperatures.
- Keep containers tightly sealed when not in use.
- Recommended storage temperature: 5°C–35°C.
Shelf Life
12 months under proper storage conditions.
Why InnoNew?
Consistent Manufacturing Quality
Strict quality control ensures stable product performance across batches.
Customized Formulation Support
Customized accelerator solutions can be developed according to local cement characteristics and project requirements.
Technical Application Assistance
Professional support for dosage optimization, compatibility testing, and project troubleshooting.
Global Export Experience
Serving customers across Asia, the Middle East, Africa, South America, and other international markets.
OEM & Private Label Services
Flexible branding and packaging options for distributors and importers.
Fast Sampling Service
Rapid sample preparation and technical evaluation support.
FAQ
What is the main function of a concrete accelerator?
Concrete accelerators shorten setting time and improve early-age strength development by accelerating cement hydration.
What is the difference between alkali-free and low-alkali accelerators?
Alkali-free accelerators generally provide better long-term strength retention, lower dust generation, and improved worker safety.
Can concrete accelerators increase early strength?
Yes. Accelerators significantly improve early compressive strength, especially within the first few hours after application.
Does concrete accelerator affect 28-day strength?
Proper dosage typically maintains good long-term strength performance. Excessive dosage should be avoided.
Is this product suitable for wet-mix shotcrete?
Yes. Liquid accelerator formulations are specifically designed for wet-mix shotcrete systems.
Can it be used for dry-mix shotcrete?
Yes. Powder accelerators are commonly used in dry-mix shotcrete applications.
What is the recommended dosage?
Typical dosage ranges from 3% to 10% of cement weight, depending on project requirements.
Is the product chloride-free?
Yes. Chloride-free formulations are available for reinforced concrete and underground engineering applications.
Which cement types are compatible?
The product is compatible with most Portland cement and blended cement systems.
Is laboratory testing necessary before use?
Yes. Trial testing is strongly recommended to optimize dosage and verify compatibility.
Can customized formulations be provided?
Yes. Customized solutions can be developed based on local materials and construction requirements.
