Cement accelerator
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Cement accelerator The alias of setting agent is quick-setting water-stopping agent
Cement quick-setting agent is packed in kilogram bags
Application of cement quick-setting agent Accelerated setting agent is mainly used for slope reinforcement in underground mine tunnels, railways, highways, tunnels, water conservancy, electricity, culverts, diversion tunnels, etc. Anchor shotcrete support in the construction of light explosion anchor shotcrete support technology
Performance of cement accelerator The accelerator is a cement admixture mainly composed of sodium aluminate that is calcined with appropriate raw material components. It has the characteristics of fast setting time, early strength, high shrinkage and small deformation, which can save a lot of steel and wood, reduce rising costs, speed up the construction progress, and complete the construction tasks ahead of schedule.
How to use the cement accelerating setting agent: Dry mix the cement (or sand and gravel mixture) mixed with the accelerating setting agent and spray it directly with a high-pressure spraying machine (according to the water-cement ratio, or the whole water-cement ratio can be higher according to the actual situation) Serve on rock surface.
Performance requirements for clear slurry and hardened mortar mixed with accelerating setting agent
Product grade test items
Clean slurry mortar
Initial setting time Final setting time Compressive strength Compressive strength ratio
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For permanent tunnels, the loose and foamy debris on the rock surface can be removed first, and then holes are drilled into the rock to insert anchor rods, and then accelerating-setting concrete is sprayed.
Other constructions (such as emergency repair projects, etc.) can also be dry-mixed with a mixer and then wet-mixed with water to quickly form. However, it must be noted that the wet mixing time generally does not exceed seconds. If some engineering processes require a slightly longer setting time for concrete, the amount of accelerator can be appropriately reduced.
Precautions for cement accelerating setting agent
It is best to use fresh Portland cement or ordinary Portland cement for this product. The cement number should be above. Weathered and damp cement will affect the use of this product. The suitable range of the water-cement ratio of this product's concrete is generally selected in each region. Tests should be conducted based on the raw materials used, such as cement, sand and gravel, to select the best water-cement ratio while ensuring that the shotcrete has good workability. The dosage of accelerating setting agent should increase or decrease appropriately with the rise and fall of temperature (based on ℃). If the temperature is lower, the amount of accelerating setting agent should be increased appropriately; if the temperature is higher, the amount of accelerating setting agent should be appropriately reduced. Due to the difference in adaptability between a small number of cements and accelerators, appropriate adjustments can be made during use, that is, the amount of accelerators can be appropriately increased. Pay attention to moisture-proof when storing this product. The quick-setting effect will not be affected if stored without moisture for two years
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Cement accelerator manufacturer