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A platform for research: civil engineering, architecture and urbanism
Low-temperature low-density well cementation cement slurry system
The invention discloses a low-temperature low-density well cementation cement slurry system, and aims to solve the problems of low hydration rate and slow early strength development of low-density cement slurry in a low-temperature environment. The invention relates to a cement mortar, which comprises the following components by mass: 80-90 parts of cement; 10 to 20 parts of a lightening material; 4-8 parts of a composite early strength agent; 0 to 2 parts of a retarder; 0.5 to 4 parts of a fluid loss agent; 0.2 to 1 part of a dispersant; 2-4 parts of a suspension stabilizer; 0.03 to 0.3 part of a defoaming agent; and 60 to 80 parts of mixing water. The density of the set cement can be improved through in-situ precipitation of the nano C-S-H seed crystals, the compressive strength of the set cement can be improved in the early stage and the later stage of maintenance, the xonotlite hollow spheres are adopted to provide nucleation sites for hydration of cement and in-situ precipitation of the nano C-S-H seed crystals, and the defect of low compressive strength is overcome.
本发明公开了一种低温低密度固井水泥浆体系，以解决低温环境下低密度水泥浆水化速率低，早期强度发展缓慢的问题。本发明包括按质量份数计的如下组分：水泥：80～90份；减轻材料：10～20份；复合早强剂：4～8份；缓凝剂：0～2份；降失水剂：0.5～4份；分散剂：0.2～1份；悬浮稳定剂：2～4份；消泡剂：0.03～0.3份；拌合水：60～80份。本发明通过原位沉淀纳米C‑S‑H晶种可以提高水泥石的致密度，在养护早期和后期均可以提高水泥石的抗压强度，采用硬硅钙石空心球为水泥的水化和纳米C‑S‑H晶种的原位沉淀提供成核位点，弥补抗压强度低的不足。
Low-temperature low-density well cementation cement slurry system
The invention discloses a low-temperature low-density well cementation cement slurry system, and aims to solve the problems of low hydration rate and slow early strength development of low-density cement slurry in a low-temperature environment. The invention relates to a cement mortar, which comprises the following components by mass: 80-90 parts of cement; 10 to 20 parts of a lightening material; 4-8 parts of a composite early strength agent; 0 to 2 parts of a retarder; 0.5 to 4 parts of a fluid loss agent; 0.2 to 1 part of a dispersant; 2-4 parts of a suspension stabilizer; 0.03 to 0.3 part of a defoaming agent; and 60 to 80 parts of mixing water. The density of the set cement can be improved through in-situ precipitation of the nano C-S-H seed crystals, the compressive strength of the set cement can be improved in the early stage and the later stage of maintenance, the xonotlite hollow spheres are adopted to provide nucleation sites for hydration of cement and in-situ precipitation of the nano C-S-H seed crystals, and the defect of low compressive strength is overcome.
本发明公开了一种低温低密度固井水泥浆体系，以解决低温环境下低密度水泥浆水化速率低，早期强度发展缓慢的问题。本发明包括按质量份数计的如下组分：水泥：80～90份；减轻材料：10～20份；复合早强剂：4～8份；缓凝剂：0～2份；降失水剂：0.5～4份；分散剂：0.2～1份；悬浮稳定剂：2～4份；消泡剂：0.03～0.3份；拌合水：60～80份。本发明通过原位沉淀纳米C‑S‑H晶种可以提高水泥石的致密度，在养护早期和后期均可以提高水泥石的抗压强度，采用硬硅钙石空心球为水泥的水化和纳米C‑S‑H晶种的原位沉淀提供成核位点，弥补抗压强度低的不足。
Low-temperature low-density well cementation cement slurry system
一种低温低密度固井水泥浆体系
2024-10-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Well cementation cement slurry composition and well cementation cement slurry
| European Patent Office | 2022
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