The cement quick-setting agent can make the cement condense quickly, and the setting time can be arbitrarily adjusted, from dozens of seconds to several minutes, and is controlled by the addition amount. Cement mortar or paste mixed with this product has strong adhesion to bricks and concrete, and can be used in walls, ground plugging, impermeability and other projects. Next Xiaobian introduced the usage of cement quick-setting agent and the performance of cement quick-setting agent.
Usage of cement accelerator
Accelerating agent is mainly used in shotcreting and leak-catch engineering. Shotcrete can be used in tunnels, underground roadways and other projects to achieve rapid and high quality. How to incorporate the accelerator should be determined by the process conditions. When dry shotcrete construction is used, powdered accelerators are added at the same time as the cement, coarse aggregates, and fine aggregates are added, and these materials can be mixed evenly after the compressed air is transported. Powdered accelerator liquids can be used in wet jets but need to be added at the nozzle in the form of a gas flow and not directly into the wet jet or pump. The liquid quick-setting agent is first dissolved in water upon spraying, diluted with water in an appropriate amount at the time of spraying, and added at the nozzle by means of a water pump or wind pressure, so that it is easy to incorporate the quick-setting agent uniformly.
Silica cement is added with an appropriate amount of accelerator. At a certain water-cement ratio and a certain temperature, the cement paste has plasticity, and its setting time can be controlled within 10 minutes. The general requirement for the accelerator is that the slurry has a good fluidity, and do not cause sharp, dry, plastic-free sharpening during stirring.
Cement quick-setting agent performance
1, the initial coagulation within 3~5min after the concrete is sprayed, and the final coagulation within 10min.
2, there is a higher early strength, the late strength can not be reduced (less than 30%).
3, make concrete have a certain viscosity, to prevent excessive rebound.
4, to reduce the water-cement ratio as much as possible to prevent the shrinkage is too large, the concrete has a certain strength and durability after hardening, improve the impermeability.
5. No corrosion effect on steel bars.
Cement quick-setting agent formula
Red Star 1 quick-setting agent is a kind of powder prepared from the ratio of aluminum oxide clinker (mainly composed of sodium aluminate), sodium carbonate and quicklime according to the ratio of 1:1:0.5. The suitable dosage is 2.5% to 4.0% of the cement quality.
7ll-type quick-setting agent is made of aluminum oxide clinker and anhydrous gypsum in a mass ratio of 3:1 with grinding. Suitable dosage is 3% to 5% of cement quality.
Type 782 quick-setting agent is prepared from the ratio of slush, alumina clinker and quicklime mass ratio r, 4.5%:14.5%:11%. The suitable amount is 5% to 7%.
Editor's summary: The usage of the cement quick-setting agent and the performance of the cement quick-setting agent are introduced here. I hope to help everyone. If you want to know more related information, you can pay attention to this website information.
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