Why concrete accelerator can accelerate the hydration and hardening of cement?
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Author : Lzh
Update time : 2023-02-05 10:22:19
What is concrete accelerator? Theconcrete acceleratoris an additive that can be added to the concrete to make the concrete set and harden rapidly. The powder solid, which only accounts for 2%~3% of the cement content in the concrete, can make the concrete set initially within 5 minutes and finally within 10 minutes. It is an indispensable additive in the shotcrete construction method to rapidly set the concrete in emergency repair or in the tunnel. Its function is to accelerate the hydration and hardening of the cement and form sufficient strength in a short time. To ensure the requirements of special construction, Portland cement is added with an appropriate amount of accelerator. The cement paste has plasticity at a certain water-cement ratio and a certain temperature, and its setting time can be controlled within 10 minutes. The general requirement for the accelerator is that the paste has good fluidity, and there should be no rapid dry thickening or non-plastic rapid setting phenomenon during mixing.
Application method of concrete accelerator A cement accelerator is mainly used in shotcrete, and leak repair works. Shotcrete can achieve rapid and high-quality purposes in tunnels, tunnels, and other works. How to add an accelerator should be determined by process conditions. When using dry shotcrete construction, when adding cement, coarse aggregate, and fine aggregate, a powder accelerator should be added simultaneously; when these materials are transported by compressed air, they can be mixed evenly. The powder accelerator liquid can be used in a wet spray, but it needs to be added to the nozzle in the form of compressed air flow rather than directly added into the wet jet or pump. The liquid accelerator is first dissolved in water during injection, then diluted with water during injection, and then added to the nozzle with the help of a water pump or air pressure, so it is easy to achieve uniform mixing of the accelerator.
Characteristics of concrete accelerator 1. No adverse effect on cement, such as steel rust, alkali-aggregate reaction, long-term durability, etc 2. It has high early strength, and the later strength can not be reduced too much (less than 30%) 3. Make the cement set initially within 3~5min and finally within 10min after spraying 4. Try to reduce the water-cement ratio, prevent excessive shrinkage and improve the impermeability 5. Make the cement have a certain viscosity to prevent too high a rebound 6. It has no adverse effect on construction personnel and the environment and has no corrosive effect on reinforcement 7. Raw materials are easily available, and the price is low.
Price of concrete accelerator Concrete accelerator particle size and purity will affect the product's price, and the purchase volume can also affect the cost of the concrete accelerator. A large amount of large amount will be lower. The price of the concrete accelerator can be found on our company's official website.
Concrete accelerator supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including the concrete accelerator, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for a high-quality and cost-effective concrete accelerator, you are welcome tocontact us or inquire at any time.
