一种无碱粉末状速凝材料
By improving the composition and process of alkali-free powdered quick-setting materials, the problems of slow setting time and high rebound rate of alkali-free quick-setting agents in low temperature, large deformation and water-rich areas have been solved, achieving rapid setting and early strength improvement, with excellent adaptability and storage stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- RAILWAY CONSTR RES INST OF CHINA ACAD OF RAILWAY SCI CO LTD
- Filing Date
- 2024-11-19
- Publication Date
- 2026-07-17
AI Technical Summary
Existing alkali-free quick-setting agents have slow setting time, slow early strength development, and high rebound rate in shotcrete construction in low-temperature, large-deformation, and water-rich areas. They are also greatly affected by external temperature and moisture, making it difficult to meet construction requirements.
An alkali-free powdered quick-setting material is used, comprising flash-setting components, setting-regulating components, drying components, reinforcing components, grinding aid components, and thickening components. By improving the setting and hardening mechanism of the quick-setting material, amorphous components with a certain fineness, such as 3CaO·Al2O3, 12CaO·7Al2O3, CaO·Al2O3, CaO·2Al2O3, CaO·6Al2O3, and α-Al2O3, are used as flash-setting components. Combined with components such as gypsum dihydrate and nano-silica, the setting process of sprayed concrete is optimized.
It achieves rapid setting in low-temperature, large-deformation, and water-rich areas, improves early strength, reduces rebound rate, ensures construction stability and durability, and has strong adaptability and good storage stability.
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