Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Suspended alkali-free liquid accelerator and preparation method thereof
The invention belongs to the technical field of concrete admixtures, and discloses a suspension type alkali-free liquid accelerator and a preparation method thereof. The preparation method comprises the following steps: firstly, respectively preparing magnesium-aluminum layered double hydroxide and an amino-terminated hyperbranched polymer, then adding the magnesium-aluminum layered double hydroxide and the amino-terminated hyperbranched polymer into water, stirring and dispersing uniformly, and then adding aluminum sulfate and a pH regulator, stirring and dispersing uniformly to obtain the suspension type alkali-free liquid accelerator. The magnesium-aluminum layered double-metal hydroxide with high dispersing performance and high specific surface area is further cooperated with the amino-terminated hyperbranched polymer to form a co-stabilizing system and a tackifying system of an inorganic-organic polymer, so that a high-concentration supersaturated aluminum sulfate solution system can be subjected to suspension stabilization; and a good quick-setting effect can be achieved, the early strength of the concrete is improved, the rebound rate of the sprayed concrete is reduced, and the pipe blocking phenomenon in the application process of the sprayed concrete is effectively improved.
本发明属于混凝土外加剂技术领域，公开了一种悬浮型无碱液体速凝剂及其制备方法。首先分别制备镁铝层状双金属氢氧化物和端氨基超支化聚合物，然后将镁铝层状双金属氢氧化物与端氨基超支化聚合物加入到水中搅拌分散均匀，再加入硫酸铝及pH调节剂搅拌分散均匀，得到所述悬浮型无碱液体速凝剂。本发明采用高分散性能、高比表面积的镁铝层状双金属氢氧化物进一步协同端氨基超支化聚合物形成无机‑有机聚合物的共稳定体系及增粘体系，可以悬浮稳定高浓度过饱和硫酸铝溶液体系，可达到良好的速凝效果及提高混凝土的早期强度，并降低喷射混凝土的回弹率和有效改善喷射混凝土应用过程中的堵管现象。
Suspended alkali-free liquid accelerator and preparation method thereof
The invention belongs to the technical field of concrete admixtures, and discloses a suspension type alkali-free liquid accelerator and a preparation method thereof. The preparation method comprises the following steps: firstly, respectively preparing magnesium-aluminum layered double hydroxide and an amino-terminated hyperbranched polymer, then adding the magnesium-aluminum layered double hydroxide and the amino-terminated hyperbranched polymer into water, stirring and dispersing uniformly, and then adding aluminum sulfate and a pH regulator, stirring and dispersing uniformly to obtain the suspension type alkali-free liquid accelerator. The magnesium-aluminum layered double-metal hydroxide with high dispersing performance and high specific surface area is further cooperated with the amino-terminated hyperbranched polymer to form a co-stabilizing system and a tackifying system of an inorganic-organic polymer, so that a high-concentration supersaturated aluminum sulfate solution system can be subjected to suspension stabilization; and a good quick-setting effect can be achieved, the early strength of the concrete is improved, the rebound rate of the sprayed concrete is reduced, and the pipe blocking phenomenon in the application process of the sprayed concrete is effectively improved.
本发明属于混凝土外加剂技术领域，公开了一种悬浮型无碱液体速凝剂及其制备方法。首先分别制备镁铝层状双金属氢氧化物和端氨基超支化聚合物，然后将镁铝层状双金属氢氧化物与端氨基超支化聚合物加入到水中搅拌分散均匀，再加入硫酸铝及pH调节剂搅拌分散均匀，得到所述悬浮型无碱液体速凝剂。本发明采用高分散性能、高比表面积的镁铝层状双金属氢氧化物进一步协同端氨基超支化聚合物形成无机‑有机聚合物的共稳定体系及增粘体系，可以悬浮稳定高浓度过饱和硫酸铝溶液体系，可达到良好的速凝效果及提高混凝土的早期强度，并降低喷射混凝土的回弹率和有效改善喷射混凝土应用过程中的堵管现象。
Suspended alkali-free liquid accelerator and preparation method thereof
一种悬浮型无碱液体速凝剂及其制备方法
LI PEICHUN (Autor:in) / LI GUIQING (Autor:in) / LU CAINENG (Autor:in) / WU WEN (Autor:in) / HUA XINGYAO (Autor:in)
04.05.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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