A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of alkali-free setting accelerator for concrete
The invention provides a preparation method of an alkali-free setting accelerator for concrete. The preparation method comprises the following steps: adding a certain amount of water into a reaction kettle under a temperature condition of 25 DEG C, and adding a certain amount of oxide or hydroxide powder of aluminum, lithium, zinc, calcium, magnesium and barium; carrying out stirring for 5-15 minutes, adding trifluoromethanesulfonate or fluosilicate, carrying out sealed protection by using nitrogen with a pressure of 0.12 MPa, and dropwise adding all the trifluoromethanesulfonate or fluosilicate within 1-3 hours of stirring; dropwise adding alkylol amine for neutralization and coordination while stirring, and conducting stirring for 1-3 hours to obtain alkali-free accelerator mother liquor; and according to the cement property and mixing amount requirements, adding water and calcium formate to dilute the alkali-free accelerator mother liquor into the alkali-free accelerator for concrete and with a concentration of 20-50%. The alkali-free accelerator has the advantages of convenience in packaging and transportation, simplicity in compounding and use, adjustable initial and final setting time when being used for concrete, good early strength and later strength, low cost and the like. The preparation method has the technical effects of simple preparation process, simple equipment,high production efficiency, zero emission and no pollution.
一种混凝土用无碱速凝剂的制备方法，包括如下步骤在25℃的温度条件下，向反应釜中加入一定量的水，加入定量的铝、锂、锌、钙、镁、钡的氧化物或者氢氧化物粉状物；搅拌5～15分钟后，加入的三氟甲磺酸盐或者氟硅酸盐，用1.2个大气压的氮气密闭保护，搅拌1～3小时内滴加完三氟甲磺酸盐或者氟硅酸盐；后边搅拌边滴加醇胺中和与配位，搅拌1‑3小时，得到无碱速凝剂母液；根据水泥性质与掺量要求，添加水与甲酸钙将无碱速凝剂母液稀释成浓度为20～50％的混凝土用无碱速凝剂具有具有包装运输方便、复配使用简单，用于混凝土时初终凝时间可调控、早期强度与后期强度好，该制备方法具有制备工艺简单、设备简易、生产效率高和零排放无污染的技术效果。
Preparation method of alkali-free setting accelerator for concrete
The invention provides a preparation method of an alkali-free setting accelerator for concrete. The preparation method comprises the following steps: adding a certain amount of water into a reaction kettle under a temperature condition of 25 DEG C, and adding a certain amount of oxide or hydroxide powder of aluminum, lithium, zinc, calcium, magnesium and barium; carrying out stirring for 5-15 minutes, adding trifluoromethanesulfonate or fluosilicate, carrying out sealed protection by using nitrogen with a pressure of 0.12 MPa, and dropwise adding all the trifluoromethanesulfonate or fluosilicate within 1-3 hours of stirring; dropwise adding alkylol amine for neutralization and coordination while stirring, and conducting stirring for 1-3 hours to obtain alkali-free accelerator mother liquor; and according to the cement property and mixing amount requirements, adding water and calcium formate to dilute the alkali-free accelerator mother liquor into the alkali-free accelerator for concrete and with a concentration of 20-50%. The alkali-free accelerator has the advantages of convenience in packaging and transportation, simplicity in compounding and use, adjustable initial and final setting time when being used for concrete, good early strength and later strength, low cost and the like. The preparation method has the technical effects of simple preparation process, simple equipment,high production efficiency, zero emission and no pollution.
一种混凝土用无碱速凝剂的制备方法，包括如下步骤在25℃的温度条件下，向反应釜中加入一定量的水，加入定量的铝、锂、锌、钙、镁、钡的氧化物或者氢氧化物粉状物；搅拌5～15分钟后，加入的三氟甲磺酸盐或者氟硅酸盐，用1.2个大气压的氮气密闭保护，搅拌1～3小时内滴加完三氟甲磺酸盐或者氟硅酸盐；后边搅拌边滴加醇胺中和与配位，搅拌1‑3小时，得到无碱速凝剂母液；根据水泥性质与掺量要求，添加水与甲酸钙将无碱速凝剂母液稀释成浓度为20～50％的混凝土用无碱速凝剂具有具有包装运输方便、复配使用简单，用于混凝土时初终凝时间可调控、早期强度与后期强度好，该制备方法具有制备工艺简单、设备简易、生产效率高和零排放无污染的技术效果。
Preparation method of alkali-free setting accelerator for concrete
混凝土用无碱速凝剂的制备方法
WU ZHENJUN (author) / YUAN JIANMIN (author) / GAO YEPING (author) / HOU RUIMIN (author) / LI JUNTANG (author) / WANG GUORUI (author)
2020-11-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Alkali-free liquid concrete setting accelerator and preparation method thereof
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