Year1
- 袋装：
- 40kg
Concrete accelerator implementation standard contact information:
Concrete accelerator is the latest product jointly developed by the National Academy of Building Sciences and the General Research Institute of Coal Research. It is a powdery concrete mortar admixture that has a rapid setting and hardening effect on cement. Cement slurry mixed with an appropriate amount of accelerating setting agent can quickly set and harden, with high early strength and growing late strength, and Can maintain other properties of cement. The main component of the accelerator for shotcrete is sodium aluminate, which is a supporting product for the wet spraying process of concrete mortar. It has the advantages of small dust, low rebound rate, and good workability.
Accelerating setting agents can be widely used in shotcrete and mortar projects. It is used for lining support after rock excavation and ore mining in underground engineering and tunnel engineering in national defense, railway, metallurgy, coal, hydropower and other departments. Compared with ordinary poured concrete support, it can speed up the construction and reduce the project cost.
The concrete accelerating setting agent has been certified by the state, and its product performance and comprehensive technical and economic effects are superior to other types of accelerating setting agents.
Accelerated setting agent Concrete accelerating setting agent's physical and mechanical properties of concrete:
Test project factory indicators Industry indicators (first-class product)
Appearance initial setting
Final setting
days Compressive strength ratio %
Daily compressive strength ratio %
Main technical indicators and performance characteristics:
At a suitable water-cement ratio and normal temperature, the cement slurry can be initially set within minutes. , final setting within minutes.
The early strength (within one day) of cement stone is twice that of that without admixture, and the daily compressive strength is about % higher than that of other domestic accelerating setting agents.
Shotcrete has less rebound, less volume change after hardening, less strength loss in the later stages of concrete, less alkalinity, less corrosive to the human body, and short interval between initial and final setting
Loading, transportation and storage
/> The accelerating setting agent is highly hygroscopic and must be protected from moisture. For this purpose, the accelerating setting agent is packed in a sealed plastic bag, plus a layer of woven bag, with a net weight of kilograms per bag.
During transportation, handle it with care to prevent the bag from tearing and causing the accelerating agent to become ineffective due to moisture.
The accelerating setting agent should be stored in a dry warehouse and kept properly to prevent it from getting damp so that it can be used for a long time.
Usage methods and precautions
When used, mix in the determined appropriate dosage (generally % of cement weight). There are two methods of adding the accelerating concrete to the sprayed concrete: adding it first and adding it later: the former is to dry-mix the accelerating agent with cement, sand and gravel, and then transport it to the spray machine for spraying; the latter is to add the accelerating agent evenly. On the feeding belt, add the mixture into the spray machine bucket together, or evenly add the accelerating agent directly into the spray machine for spraying. The shorter the pause time, the better, to prevent the accelerating setting agent from absorbing moisture in the aggregate, causing premature condensation and affecting the quality of the project.
The accelerating setting agent has good adaptability to a variety of cements, but the accelerating setting effect on cement still needs to be measured before use. To choose the cement variety with the best adaptability. Fresh and unmoistened cement should be used to achieve the best setting effect.
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