Shotcrete Accelerator – Aqueous Solution
Description
AD-TEK SA is a high-performance alkali-free composite set and hardening accelerating admixture for shotcrete.
AD-TEK SA is in accordance with Australian Standard AS1478.1 – 2000 as a Special Purpose Accelerating Admixture.
Uses
AD-TEK SA is appropriate for all applications where a very high early strength, good final strength, and large layer thickness of shotcrete are required. AD-TEK SA is mainly used in:
- Rock support in mine and tunnel construction
- Slope and rock stabilisation
- Poor and wet ground conditions
- High-grade shotcrete for general construction work
Advantages
- Alkali and chlorides free product
- Optimal performance when using AD-TEK SH (hyperplasticizer)
- No contamination of natural waters due to washout alkalis
- Quick setting with early strength development
- Good long-term strength and durability
- Rapid work progress
- Increases adhesion (bond) to rock and concrete substrate, making overhead and vertical spraying easier
- Significantly reduces rebound
- Low dust production
- Thick shotcrete layer during one construction sequence (by layered application)
- Good performance on wet ground
Technical Data (typical)
| Property | Value |
|---|---|
| Appearance | Translucent liquid |
| Colour | Light beige |
| Density at 20ºC | Approx. 1.4 kg/litre |
| pH value | 2.5-4.0 |
Application
The liquid accelerator AD-TEK SA is metered and injected directly at the shotcrete nozzle.
The efficiency of AD-TEK SA depends on shotcrete ingredients, design, temperature, substrate and application method used. It is also dependent on the w/c ratio in the wet spray process and on the addition of water during the dry spray process.
Dosage
The recommended dose rate is 3% to 6% by weight of cement. The most effective dosage must be determined by trial.
Shelf Life and Storage
AD-TEK SA must be stored at a temperature between 5ºC and 35ºC in unopened containers made of plastic, glass fibre, or stainless steel. If these conditions are unachievable, the product may partially precipitate and mechanical stirring will be required until the complete dissolution of the precipitate.
AD-TEK SA has a shelf life of 3 months. After prolonged storage, it is recommended that the product be always fully agitated prior to use.
Packaging
AD-TEK SA is available in 1000-litre containers, 200-litre drums, and in bulk.
Health and Safety
AD-TEK SA contains no hazardous substances requiring labelling. For further information refer to the Material Safety Data Sheet.
Please contact our technical department for further information.
Disclaimer: Any advice, recommendation, information, assistance or service provided by application is in good faith and is believed by AD-TEK PTY LTD to be appropriate and reliable. However, any advice, recommendation, information, assistance or service provided by AD-TEK PTY LTD is provided without liability.