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A platform for research: civil engineering, architecture and urbanism
Fly ash-based pasty admixture with early strength and chloride ion curing functions as well as preparation method and application thereof
The invention discloses a fly ash-based pasty admixture with early strength and chloride ion curing functions as well as a preparation method and application of the fly ash-based pasty admixture. According to the preparation method, high-alumina fly ash is taken as an aluminum source, calcium oxide is taken as a supplementary calcium source, a polycarboxylate superplasticizer (PCE) is taken as an anion intercalation modified material, the environmental pH is controlled by a pH buffer solution, and the fly ash-based pasty admixture containing rich and high-activity Ca-A1-PCE layered double hydroxides is prepared under the mechanical force-chemical synergistic effect; according to the present invention, the defect of insufficient early activity of the traditional fly ash is overcome, the early strength fly ash has excellent early strength effect and outstanding chloride ion curing ability, and when the early strength fly ash is used in concrete, the 28d chloride ion curing rate can be improved by 30-40%, and the 1d compressive strength can be improved by 30-50%.
本发明公开了一种具有早强及氯离子固化功能的粉煤灰基浆状掺合料及其制备方法和应用。本发明以高铝粉煤灰为铝源，氧化钙为补充钙源，聚羧酸减水剂(PCE)为阴离子插层改性材料，通过pH缓冲液控制环境pH，在机械力‑化学协同作用下制备出含有丰富高活性的Ca‑A1‑PCE层状双氢氧化物的粉煤灰基浆状掺合料，其克服了传统粉煤灰早期活性不足缺陷，兼具优异的早强效果和突出的氯离子固化能力，当将其用于混凝土中时，28d氯离子固化率可提升30～40％，1d抗压强度可提高30～50％。
Fly ash-based pasty admixture with early strength and chloride ion curing functions as well as preparation method and application thereof
The invention discloses a fly ash-based pasty admixture with early strength and chloride ion curing functions as well as a preparation method and application of the fly ash-based pasty admixture. According to the preparation method, high-alumina fly ash is taken as an aluminum source, calcium oxide is taken as a supplementary calcium source, a polycarboxylate superplasticizer (PCE) is taken as an anion intercalation modified material, the environmental pH is controlled by a pH buffer solution, and the fly ash-based pasty admixture containing rich and high-activity Ca-A1-PCE layered double hydroxides is prepared under the mechanical force-chemical synergistic effect; according to the present invention, the defect of insufficient early activity of the traditional fly ash is overcome, the early strength fly ash has excellent early strength effect and outstanding chloride ion curing ability, and when the early strength fly ash is used in concrete, the 28d chloride ion curing rate can be improved by 30-40%, and the 1d compressive strength can be improved by 30-50%.
本发明公开了一种具有早强及氯离子固化功能的粉煤灰基浆状掺合料及其制备方法和应用。本发明以高铝粉煤灰为铝源，氧化钙为补充钙源，聚羧酸减水剂(PCE)为阴离子插层改性材料，通过pH缓冲液控制环境pH，在机械力‑化学协同作用下制备出含有丰富高活性的Ca‑A1‑PCE层状双氢氧化物的粉煤灰基浆状掺合料，其克服了传统粉煤灰早期活性不足缺陷，兼具优异的早强效果和突出的氯离子固化能力，当将其用于混凝土中时，28d氯离子固化率可提升30～40％，1d抗压强度可提高30～50％。
Fly ash-based pasty admixture with early strength and chloride ion curing functions as well as preparation method and application thereof
具有早强及氯离子固化功能的粉煤灰基浆状掺合料及其制备方法和应用
TAN HONGBO (author) / ZHANG SHIXUAN (author) / LEE SANG-KOOK (author) / JIAN SHOUWEI (author) / HUANG JIAN (author) / LYU YANG (author)
2023-10-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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