Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of negative carbon cemented filling material
The invention discloses a preparation method of a negative carbon cemented filling material, which specifically comprises the following steps: firstly, mixing and stirring fly ash and water to prepare fly ash slurry; conveying the fly ash slurry into a high-pressure reaction kettle, introducing CO2, and continuously stirring the slurry until the pH change amplitude of the slurry is less than 0.02/min; carrying out pH detection on the fully reacted fly ash slurry, if the pH is less than or equal to 9, directly entering the next step, and if the pH is greater than 9, adding an additive into the fly ash slurry until the pH is less than or equal to 9; and conveying the fly ash slurry with the pH value reaching the standard to a secondary stirring system, adding aggregate and cement, and stirring to prepare the negative carbon cemented filling material. According to the preparation method of the negative carbon cemented filling material, a CO2 mineralization technology and a fly ash modification technology are fused, on one hand, CO2 can be mineralized and stored, on the other hand, fly ash can be modified, and the problem of water resource damage caused by fly ash underground filling is solved.
本发明公开了负碳胶结充填材料制备方法，具体为：首先，将粉煤灰与水混合搅拌，制成粉煤灰浆体；将粉煤灰浆体输送至高压反应釜中并通入CO2，并持续搅拌浆体直至浆体pH变化幅度小于0.02/min；对充分反应后的粉煤灰浆体进行pH检测，若pH≤9则直接进入下一步骤，若pH＞9，则向粉煤灰浆体中加入添加剂直至pH≤9；将pH值达标的粉煤灰浆体输送至二次搅拌系统，并添加骨料和水泥进行搅拌，制成负碳胶结充填材料。本发明的负碳胶结充填材料制备方法，将CO2矿化技术与粉煤灰改性技术相融合，一方面可以矿化封存CO2，另一方面可以对粉煤灰进行改性，解决粉煤灰井下充填引起的水资源破坏问题。
Preparation method of negative carbon cemented filling material
The invention discloses a preparation method of a negative carbon cemented filling material, which specifically comprises the following steps: firstly, mixing and stirring fly ash and water to prepare fly ash slurry; conveying the fly ash slurry into a high-pressure reaction kettle, introducing CO2, and continuously stirring the slurry until the pH change amplitude of the slurry is less than 0.02/min; carrying out pH detection on the fully reacted fly ash slurry, if the pH is less than or equal to 9, directly entering the next step, and if the pH is greater than 9, adding an additive into the fly ash slurry until the pH is less than or equal to 9; and conveying the fly ash slurry with the pH value reaching the standard to a secondary stirring system, adding aggregate and cement, and stirring to prepare the negative carbon cemented filling material. According to the preparation method of the negative carbon cemented filling material, a CO2 mineralization technology and a fly ash modification technology are fused, on one hand, CO2 can be mineralized and stored, on the other hand, fly ash can be modified, and the problem of water resource damage caused by fly ash underground filling is solved.
本发明公开了负碳胶结充填材料制备方法，具体为：首先，将粉煤灰与水混合搅拌，制成粉煤灰浆体；将粉煤灰浆体输送至高压反应釜中并通入CO2，并持续搅拌浆体直至浆体pH变化幅度小于0.02/min；对充分反应后的粉煤灰浆体进行pH检测，若pH≤9则直接进入下一步骤，若pH＞9，则向粉煤灰浆体中加入添加剂直至pH≤9；将pH值达标的粉煤灰浆体输送至二次搅拌系统，并添加骨料和水泥进行搅拌，制成负碳胶结充填材料。本发明的负碳胶结充填材料制备方法，将CO2矿化技术与粉煤灰改性技术相融合，一方面可以矿化封存CO2，另一方面可以对粉煤灰进行改性，解决粉煤灰井下充填引起的水资源破坏问题。
Preparation method of negative carbon cemented filling material
负碳胶结充填材料的制备方法
ZHU LEI (Autor:in) / LIU CHENGYONG (Autor:in) / GU WENZHE (Autor:in) / ZHANG PENG (Autor:in) / PAN HAO (Autor:in) / YUAN CHAOFENG (Autor:in) / SONG TIANQI (Autor:in) / AKITOYOKI (Autor:in) / SUN JUNYAN (Autor:in) / LI JUAN (Autor:in)
12.05.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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