A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method and application of alkali-free fluoride-free liquid accelerator
The invention discloses a preparation method and application of an alkali-free fluoride-free liquid accelerator. The alkali-free fluoride-free liquid accelerator comprises the following components: aluminum salt, magnesium sulfate, alcohol amine, a stabilizer and a hyperbranched polymer. The branched chain terminal of the molecular structure of the hyperbranched polymer respectively contains carboxyl or amino, and the coordination ability of aluminum ions and branched chain terminal groups is improved and the solubility and stability of the aluminum salt are increased depending on the low viscosity, high solubility, large space volume and abundant branched chain terminals of the hyperbranched polymer; meanwhile, the viscosity of the accelerator is regulated and controlled by the hyperbranched polymer, the accelerator is added into sprayed concrete to improve the thixotropy of the concrete and increase the thickness of slurry on the surface of aggregate, the dissolution rate of aluminum ions is regulated and controlled through the coordination stability difference of the hyperbranched polymer containing the amino-terminated group and the carboxyl-terminated group to the aluminum ions and the calcium ions, cement hydration is promoted through synergistic interaction, and the setting time is shortened; the concrete early strength is improved.
本发明公开了一种无碱无氟液体速凝剂的制备方法及其应用，本发明所述的无碱无氟液体速凝剂组分包括铝盐、硫酸镁、醇胺、稳定剂、超支化聚合物；所述的超支化聚合物的分子结构支链末端分别含羧基或氨基，本发明依托超支化聚合物的低粘、高溶解特性、较大的空间体积特性和丰富的支链末端，提升铝离子与支链末端基团的配位能力，增大铝盐的溶解度及稳定性；同时超支化聚合物调控速凝剂粘度，加入到喷射混凝土中改善混凝土触变性，增大骨料表面浆体厚度，通过含端氨基和端羧基超支化聚合物对铝离子和钙离子的配位稳定性差异，调控铝离子溶出速率协同增效促进水泥水化，缩短凝结时间，提升混凝土早期强度。
Preparation method and application of alkali-free fluoride-free liquid accelerator
The invention discloses a preparation method and application of an alkali-free fluoride-free liquid accelerator. The alkali-free fluoride-free liquid accelerator comprises the following components: aluminum salt, magnesium sulfate, alcohol amine, a stabilizer and a hyperbranched polymer. The branched chain terminal of the molecular structure of the hyperbranched polymer respectively contains carboxyl or amino, and the coordination ability of aluminum ions and branched chain terminal groups is improved and the solubility and stability of the aluminum salt are increased depending on the low viscosity, high solubility, large space volume and abundant branched chain terminals of the hyperbranched polymer; meanwhile, the viscosity of the accelerator is regulated and controlled by the hyperbranched polymer, the accelerator is added into sprayed concrete to improve the thixotropy of the concrete and increase the thickness of slurry on the surface of aggregate, the dissolution rate of aluminum ions is regulated and controlled through the coordination stability difference of the hyperbranched polymer containing the amino-terminated group and the carboxyl-terminated group to the aluminum ions and the calcium ions, cement hydration is promoted through synergistic interaction, and the setting time is shortened; the concrete early strength is improved.
本发明公开了一种无碱无氟液体速凝剂的制备方法及其应用，本发明所述的无碱无氟液体速凝剂组分包括铝盐、硫酸镁、醇胺、稳定剂、超支化聚合物；所述的超支化聚合物的分子结构支链末端分别含羧基或氨基，本发明依托超支化聚合物的低粘、高溶解特性、较大的空间体积特性和丰富的支链末端，提升铝离子与支链末端基团的配位能力，增大铝盐的溶解度及稳定性；同时超支化聚合物调控速凝剂粘度，加入到喷射混凝土中改善混凝土触变性，增大骨料表面浆体厚度，通过含端氨基和端羧基超支化聚合物对铝离子和钙离子的配位稳定性差异，调控铝离子溶出速率协同增效促进水泥水化，缩短凝结时间，提升混凝土早期强度。
Preparation method and application of alkali-free fluoride-free liquid accelerator
一种无碱无氟液体速凝剂的制备方法及其应用
2022-12-13
Patent
Electronic Resource
Chinese
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