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A platform for research: civil engineering, architecture and urbanism
Preparation method of alkali-free accelerator for concrete
The invention relates to the technical field of building material concrete admixtures, in particular to a preparation method of an alkali-free accelerator for concrete, which comprises the following steps: preferentially mixing and stirring water and fluosilicic acid, then sequentially adding ethanolamine, ethylene glycol and diacrylamide into the solution, mixing and stirring, finally adding anhydrous aluminum sulfate powder into the solution, mixing and stirring, and finally adding sodium hydroxide into the solution to obtain the alkali-free accelerator for concrete. The alkali-free accelerator for the concrete is obtained. Compared with the prior art, by setting the molecular weight of the synthetic accelerator and adding the high-molecular raw materials, the cohesiveness of physical reaction of the accelerator and the shotcrete anchor concrete is enhanced, and the technical problem that the springback amount of the shotcrete anchor concrete is large in tunnel construction is solved.
本发明涉及建筑材料混凝土外加剂技术领域，具体是一种混凝土用无碱速凝剂的制备方法，包括将水、氟硅酸优先混合搅拌，再向溶液中依次加入乙醇胺、乙二醇、二丙烯酰胺并进行混合搅拌，最后再向溶液中加入无水硫酸铝粉末，混合搅拌后，得到混凝土用无碱速凝剂。相比起现有技术，本专利通过设置合成速凝剂的分子量，并添加高分子原料，增强速凝剂和喷锚混凝土物理反应的粘结性，解决了喷锚混凝土在隧道施工中回弹量大的技术问题。
Preparation method of alkali-free accelerator for concrete
The invention relates to the technical field of building material concrete admixtures, in particular to a preparation method of an alkali-free accelerator for concrete, which comprises the following steps: preferentially mixing and stirring water and fluosilicic acid, then sequentially adding ethanolamine, ethylene glycol and diacrylamide into the solution, mixing and stirring, finally adding anhydrous aluminum sulfate powder into the solution, mixing and stirring, and finally adding sodium hydroxide into the solution to obtain the alkali-free accelerator for concrete. The alkali-free accelerator for the concrete is obtained. Compared with the prior art, by setting the molecular weight of the synthetic accelerator and adding the high-molecular raw materials, the cohesiveness of physical reaction of the accelerator and the shotcrete anchor concrete is enhanced, and the technical problem that the springback amount of the shotcrete anchor concrete is large in tunnel construction is solved.
本发明涉及建筑材料混凝土外加剂技术领域，具体是一种混凝土用无碱速凝剂的制备方法，包括将水、氟硅酸优先混合搅拌，再向溶液中依次加入乙醇胺、乙二醇、二丙烯酰胺并进行混合搅拌，最后再向溶液中加入无水硫酸铝粉末，混合搅拌后，得到混凝土用无碱速凝剂。相比起现有技术，本专利通过设置合成速凝剂的分子量，并添加高分子原料，增强速凝剂和喷锚混凝土物理反应的粘结性，解决了喷锚混凝土在隧道施工中回弹量大的技术问题。
Preparation method of alkali-free accelerator for concrete
一种混凝土用无碱速凝剂的制备方法
REN PENGFEI (author) / ZHANG XIN (author)
2023-09-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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