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Powder alkali-free fluoride-free chloride-free accelerator and preparation method thereof
The invention discloses a powdery alkali-free fluoride-free chloride-free accelerator and a preparation method thereof, and relates to the technical field of concrete admixtures. According to the invention, industrial concentrated sulfuric acid, aluminum hydroxide, alcohol amine substances and water are used as raw materials, the raw materials are subjected to high-temperature and high-pressure reaction, evaporative cooling, solidification forming, crushing, drying and grinding, and the additive is prepared from the following raw materials in percentage by weight: 33%-37% of tap water, 26%-29% of aluminum hydroxide, 29%-32% of concentrated sulfuric acid, 6%-8% of diethanol amine, 0-1% of N, N, N ', N', N ', N', N ', N', N ', N', N ', N', N ', N', N ', N', N ', N', N ', N The corrosion inhibitor comprises the following components in percentage by weight: 0-1% of N, N, N '-tetrahydroxyethyl ethylenediamine, 0-1% of cinnamamide, 0-1.0% of anhydrous iron-free aluminum sulfate and 0-1.0% of nano mesoporous silicon dioxide. The prepared powdery fluoride-free alkali-free chlorine-free accelerator is long in shelf life, has good water solubility, can be compounded into a 50%-65% liquid alkali-free accelerator and has good stability, the setting time and the compressive strength performance of the powdery fluoride-free alkali-free chlorine-free accelerator can meet the standard vertebra requirements of the national iron group Q/CR807-2020 Liquid Alkali-free Accelerator for Tunnel Spraying Concrete, and the powdery fluoride-free alkali-free chlorine-free accelerator has the advantages of being simple in preparation process, low in cost and wide in application prospect. The packaging and transportation cost can be greatly reduced, large-scale production is easy to realize, and the method has a wide market prospect.
本发明公开了一种粉剂无碱无氟无氯速凝剂及其制备方法，涉及混凝土外加剂技术领域。本发明以工业浓硫酸、氢氧化铝、醇胺类物质以及水为原料通过高温高压反应、蒸发冷却、凝固成型，再经过破碎、干燥粉磨而成，其各原材料占比按重量百分比为33％‑37％自来水，26％‑29％氢氧化铝，29％‑32％浓硫酸，6％‑8％二乙醇胺，0‑1％N,N,N',N'‑四羟乙基乙二胺，0‑1％肉桂酰胺，0‑1.0％无水无铁硫酸铝，0‑1.0％纳米介孔二氧化硅。本发明制备的粉剂无氟无碱无氯速凝剂保质期长，具有良好的水溶性，可复配成50％‑65％液体无碱速凝剂，并具有良好的稳定性，其凝结时间和抗压强度性能可满足国铁集团Q/CR807‑2020《隧道喷射混凝土用液体无碱速凝剂》标椎要求，可大幅度降低包装和运输成本，且易实现大规模化生产，具有广阔的市场前景。
Powder alkali-free fluoride-free chloride-free accelerator and preparation method thereof
The invention discloses a powdery alkali-free fluoride-free chloride-free accelerator and a preparation method thereof, and relates to the technical field of concrete admixtures. According to the invention, industrial concentrated sulfuric acid, aluminum hydroxide, alcohol amine substances and water are used as raw materials, the raw materials are subjected to high-temperature and high-pressure reaction, evaporative cooling, solidification forming, crushing, drying and grinding, and the additive is prepared from the following raw materials in percentage by weight: 33%-37% of tap water, 26%-29% of aluminum hydroxide, 29%-32% of concentrated sulfuric acid, 6%-8% of diethanol amine, 0-1% of N, N, N ', N', N ', N', N ', N', N ', N', N ', N', N ', N', N ', N', N ', N', N ', N The corrosion inhibitor comprises the following components in percentage by weight: 0-1% of N, N, N '-tetrahydroxyethyl ethylenediamine, 0-1% of cinnamamide, 0-1.0% of anhydrous iron-free aluminum sulfate and 0-1.0% of nano mesoporous silicon dioxide. The prepared powdery fluoride-free alkali-free chlorine-free accelerator is long in shelf life, has good water solubility, can be compounded into a 50%-65% liquid alkali-free accelerator and has good stability, the setting time and the compressive strength performance of the powdery fluoride-free alkali-free chlorine-free accelerator can meet the standard vertebra requirements of the national iron group Q/CR807-2020 Liquid Alkali-free Accelerator for Tunnel Spraying Concrete, and the powdery fluoride-free alkali-free chlorine-free accelerator has the advantages of being simple in preparation process, low in cost and wide in application prospect. The packaging and transportation cost can be greatly reduced, large-scale production is easy to realize, and the method has a wide market prospect.
本发明公开了一种粉剂无碱无氟无氯速凝剂及其制备方法，涉及混凝土外加剂技术领域。本发明以工业浓硫酸、氢氧化铝、醇胺类物质以及水为原料通过高温高压反应、蒸发冷却、凝固成型，再经过破碎、干燥粉磨而成，其各原材料占比按重量百分比为33％‑37％自来水，26％‑29％氢氧化铝，29％‑32％浓硫酸，6％‑8％二乙醇胺，0‑1％N,N,N',N'‑四羟乙基乙二胺，0‑1％肉桂酰胺，0‑1.0％无水无铁硫酸铝，0‑1.0％纳米介孔二氧化硅。本发明制备的粉剂无氟无碱无氯速凝剂保质期长，具有良好的水溶性，可复配成50％‑65％液体无碱速凝剂，并具有良好的稳定性，其凝结时间和抗压强度性能可满足国铁集团Q/CR807‑2020《隧道喷射混凝土用液体无碱速凝剂》标椎要求，可大幅度降低包装和运输成本，且易实现大规模化生产，具有广阔的市场前景。
Powder alkali-free fluoride-free chloride-free accelerator and preparation method thereof
一种粉剂无碱无氟无氯速凝剂及其制备方法
DENG NI (author) / LI HANJIAN (author) / CHEN XINGJIA (author) / SUN YOU (author) / WANG YUANFU (author) / GAO ZONGHONG (author)
2024-10-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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