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Nanocrystallized composite super early strength agent as well as preparation method and application thereof
The invention provides a nanocrystallization composite super early strength agent as well as a preparation method and application thereof, and belongs to the technical field of chemical admixtures. Alpha 'L-dicalcium silicate and sodium aluminate used in the invention can form aluminum-doped calcium silicate hydrate, and in the synthesis process of calcium silicate hydrate, the comb-shaped copolymer with specific anionic charge of 4000-6000 [mu] eq/g is utilized to perform intercalation composite modification on the calcium silicate hydrate to obtain the composite super early strength agent with an intercalation structure. According to the invention, calcium silicate minerals can be provided with more sufficient hydration nucleation sites, cement hydration is promoted, hydration heat release is accelerated, and the intercalation structure improves the interlayer spacing of hydrated calcium silicate and increases the number of crystal nucleuses (one composite molecule can be used as two crystal nucleuses), so that the doping amount of the super early strength agent is reduced. And meanwhile, the comb-shaped copolymer can uniformly disperse the composite super early strength agent to avoid agglomeration, so that the number of crystal nucleuses is increased, and the doping amount of the super early strength agent is reduced.
本发明提供了一种纳米化复合超早强剂及其制备方法和应用，属于化学外加剂技术领域。本发明所用α’L‑硅酸二钙与铝酸钠能够形成铝掺杂水化硅酸钙，在水化硅酸钙合成过程中，利用比阴离子电荷为4000～6000μeq/g的梳形共聚物，对水化硅酸钙进行插层复合改性，得到插层结构的复合超早强剂，能够提供硅酸钙矿物更充足的水化成核位点，促进水泥水化，加速水化放热，插层结构提高了水化硅酸钙的层间距，提高了晶核的数量(一个复合分子可以作为两个晶核)，从而减少超早强剂的掺量。同时，梳形共聚物能够使复合超早强剂均匀分散避免发生团聚，提高晶核数量减少超早强剂的掺量。
Nanocrystallized composite super early strength agent as well as preparation method and application thereof
The invention provides a nanocrystallization composite super early strength agent as well as a preparation method and application thereof, and belongs to the technical field of chemical admixtures. Alpha 'L-dicalcium silicate and sodium aluminate used in the invention can form aluminum-doped calcium silicate hydrate, and in the synthesis process of calcium silicate hydrate, the comb-shaped copolymer with specific anionic charge of 4000-6000 [mu] eq/g is utilized to perform intercalation composite modification on the calcium silicate hydrate to obtain the composite super early strength agent with an intercalation structure. According to the invention, calcium silicate minerals can be provided with more sufficient hydration nucleation sites, cement hydration is promoted, hydration heat release is accelerated, and the intercalation structure improves the interlayer spacing of hydrated calcium silicate and increases the number of crystal nucleuses (one composite molecule can be used as two crystal nucleuses), so that the doping amount of the super early strength agent is reduced. And meanwhile, the comb-shaped copolymer can uniformly disperse the composite super early strength agent to avoid agglomeration, so that the number of crystal nucleuses is increased, and the doping amount of the super early strength agent is reduced.
本发明提供了一种纳米化复合超早强剂及其制备方法和应用，属于化学外加剂技术领域。本发明所用α’L‑硅酸二钙与铝酸钠能够形成铝掺杂水化硅酸钙，在水化硅酸钙合成过程中，利用比阴离子电荷为4000～6000μeq/g的梳形共聚物，对水化硅酸钙进行插层复合改性，得到插层结构的复合超早强剂，能够提供硅酸钙矿物更充足的水化成核位点，促进水泥水化，加速水化放热，插层结构提高了水化硅酸钙的层间距，提高了晶核的数量(一个复合分子可以作为两个晶核)，从而减少超早强剂的掺量。同时，梳形共聚物能够使复合超早强剂均匀分散避免发生团聚，提高晶核数量减少超早强剂的掺量。
Nanocrystallized composite super early strength agent as well as preparation method and application thereof
一种纳米化复合超早强剂及其制备方法和应用
JIANG YAQING (author) / WANG LIMENG (author) / YIN KANGTING (author) / YAN ZIYUE (author) / ZHU YULING (author)
2023-08-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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