Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Retarding and water reducing agent for concrete
The invention belongs to the technical field of concrete building materials, and particularly relates to a retarding and water reducing agent for concrete. The retarding and water reducing agent for concrete is prepared from the following components in parts by weight: 30-50 parts of ether polycarboxylate superplasticizer, 10-20 parts of aromatic polyamide fibers, 9-15 parts of lignosulfonate, 3-8parts of retarder, 0.5-1.5 parts of initiator and 20-35 parts of water. The invention further provides the concrete for a high-strength PC component. The concrete is prepared from the following raw materials in parts by weight: 250-360 parts of cement, 50-100 parts of fly ash, 500-650 parts of quartz sand, 900-1100 parts of gravel, 60-90 parts of mineral powder, 150-180 parts of water, 9-15 partsof steel fibers, 6-9 parts of a retarding and water reducing agent, 3-8 parts of a composite expanding agent and 2-5 parts of a synergist. According to the retarding and water reducing agent disclosed by the invention, the release and diffusion of the polycarboxylate superplasticizer are delayed by adding a semipermeable membrane formed by the aromatic polyamide fibers, so that the effects of prolonging the action time of the superplasticizer and improving the dispersion retentivity are achieved, the concrete setting time is delayed, and the strength of the concrete is improved.
本发明属于混凝土建筑材料技术领域，具体涉及一种混凝土用缓凝减水剂。本发明的混凝土用缓凝减水剂，包括如下重量份数的组分：醚类聚羧酸减水剂30‑50份、芳香聚酰胺纤维10‑20份、木质素磺酸盐9‑15份、缓凝剂3‑8份、引发剂0.5‑1.5份、水20‑35份；本发明还提供一种用于高强度PC构件的混凝土，其原料包括以下重量份数的组分：水泥250‑360份、粉煤灰50‑100份、石英砂500‑650份、碎石900‑1100份、矿粉60‑90份、水150‑180份、钢纤维9‑15份、缓凝减水剂6‑9份、复合膨胀剂3‑8份、增效剂2‑5份。本发明的缓凝减水剂通过添加芳香聚酰胺纤维形成的半透膜来延缓聚羧酸减水剂的释放和扩散，从而实现延长减水剂作用时间、提高分散保持性的作用，从而延缓混凝土凝结时间，增加混凝土的强度。
Retarding and water reducing agent for concrete
The invention belongs to the technical field of concrete building materials, and particularly relates to a retarding and water reducing agent for concrete. The retarding and water reducing agent for concrete is prepared from the following components in parts by weight: 30-50 parts of ether polycarboxylate superplasticizer, 10-20 parts of aromatic polyamide fibers, 9-15 parts of lignosulfonate, 3-8parts of retarder, 0.5-1.5 parts of initiator and 20-35 parts of water. The invention further provides the concrete for a high-strength PC component. The concrete is prepared from the following raw materials in parts by weight: 250-360 parts of cement, 50-100 parts of fly ash, 500-650 parts of quartz sand, 900-1100 parts of gravel, 60-90 parts of mineral powder, 150-180 parts of water, 9-15 partsof steel fibers, 6-9 parts of a retarding and water reducing agent, 3-8 parts of a composite expanding agent and 2-5 parts of a synergist. According to the retarding and water reducing agent disclosed by the invention, the release and diffusion of the polycarboxylate superplasticizer are delayed by adding a semipermeable membrane formed by the aromatic polyamide fibers, so that the effects of prolonging the action time of the superplasticizer and improving the dispersion retentivity are achieved, the concrete setting time is delayed, and the strength of the concrete is improved.
本发明属于混凝土建筑材料技术领域，具体涉及一种混凝土用缓凝减水剂。本发明的混凝土用缓凝减水剂，包括如下重量份数的组分：醚类聚羧酸减水剂30‑50份、芳香聚酰胺纤维10‑20份、木质素磺酸盐9‑15份、缓凝剂3‑8份、引发剂0.5‑1.5份、水20‑35份；本发明还提供一种用于高强度PC构件的混凝土，其原料包括以下重量份数的组分：水泥250‑360份、粉煤灰50‑100份、石英砂500‑650份、碎石900‑1100份、矿粉60‑90份、水150‑180份、钢纤维9‑15份、缓凝减水剂6‑9份、复合膨胀剂3‑8份、增效剂2‑5份。本发明的缓凝减水剂通过添加芳香聚酰胺纤维形成的半透膜来延缓聚羧酸减水剂的释放和扩散，从而实现延长减水剂作用时间、提高分散保持性的作用，从而延缓混凝土凝结时间，增加混凝土的强度。
Retarding and water reducing agent for concrete
一种混凝土用缓凝减水剂
SHENG LEIJUN (Autor:in) / WANG YOULU (Autor:in) / HUANG GUOYANG (Autor:in) / LIU QUAN (Autor:in) / WEI LINGLING (Autor:in)
02.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2022
Concrete retarding and water reducing agent and preparation method thereof
| Europäisches Patentamt | 2023