Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-early-strength polycarboxylate superplasticizer easy to produce powder and preparation method of high-early-strength polycarboxylate superplasticizer
The invention discloses a novel easy-to-produce high-early-strength polycarboxylate superplasticizer and a preparation method thereof. According to the invention, different silane coupling agents are introduced into a molecular chain, and a silane cross-linking agent is used for carrying out a cross-linking reaction, so that the polycarboxylic acid water reducing agent which is subjected to micro-cross-linking by using the nano silica gel is obtained. Due to the special molecular structure of the polycarboxylate superplasticizer, the overall water-absorbing gel capacity of a molecular chain of the polycarboxylate superplasticizer is obviously reduced compared with that of an original polycarboxylate superplasticizer, solids rather than colloids with high water content are formed more easily in the drying process, it is guaranteed that the drying process can be carried out at the low temperature for a short time, and the water-absorbing gel capacity of the polycarboxylate superplasticizer is greatly improved. The phenomena of decomposition and chain transfer of polycarboxylate superplasticizer molecules in the drying process are effectively avoided, the use performance of solid polycarboxylic acid is guaranteed, and the defects that a conventional solid superplasticizer is low in melting point, prone to caking and poor in performance are overcome. Due to the introduction of a nano silica gel structure, the water reducing agent has obvious acceleration induction and crystallization nucleation effects on the cement hydration process, and has an obvious enhancement effect on the early strength of the prepared concrete.
本发明公开了一种新型易制粉高早强聚羧酸减水剂及其制备方法。本发明通过在分子链中引入不同的硅烷偶联剂并使用硅烷交联剂进行交联反应，得到了使用纳米硅凝胶微交联的聚羧酸减水剂。由于这种聚羧酸减水剂的特殊分子结构，其分子链整体的吸水凝胶能力较原聚羧酸减水剂明显下降，在干燥过程中更容易形成固体而非含水量较高的胶体，保证干燥过程可以在较低温度、较快时间下进行，有效避免了聚羧酸减水剂分子在干燥过程中出现的分解和链转移现象，保证了固体聚羧酸的使用性能，避免了常规固体减水剂熔点低、易结块、性能差的缺点。并由于其中纳米硅凝胶结构的引入，该减水剂对于水泥水化过程有明显的加速诱导和结晶成核作用，对于所制备的混凝土的早期强度有明显的增强效果。
High-early-strength polycarboxylate superplasticizer easy to produce powder and preparation method of high-early-strength polycarboxylate superplasticizer
The invention discloses a novel easy-to-produce high-early-strength polycarboxylate superplasticizer and a preparation method thereof. According to the invention, different silane coupling agents are introduced into a molecular chain, and a silane cross-linking agent is used for carrying out a cross-linking reaction, so that the polycarboxylic acid water reducing agent which is subjected to micro-cross-linking by using the nano silica gel is obtained. Due to the special molecular structure of the polycarboxylate superplasticizer, the overall water-absorbing gel capacity of a molecular chain of the polycarboxylate superplasticizer is obviously reduced compared with that of an original polycarboxylate superplasticizer, solids rather than colloids with high water content are formed more easily in the drying process, it is guaranteed that the drying process can be carried out at the low temperature for a short time, and the water-absorbing gel capacity of the polycarboxylate superplasticizer is greatly improved. The phenomena of decomposition and chain transfer of polycarboxylate superplasticizer molecules in the drying process are effectively avoided, the use performance of solid polycarboxylic acid is guaranteed, and the defects that a conventional solid superplasticizer is low in melting point, prone to caking and poor in performance are overcome. Due to the introduction of a nano silica gel structure, the water reducing agent has obvious acceleration induction and crystallization nucleation effects on the cement hydration process, and has an obvious enhancement effect on the early strength of the prepared concrete.
本发明公开了一种新型易制粉高早强聚羧酸减水剂及其制备方法。本发明通过在分子链中引入不同的硅烷偶联剂并使用硅烷交联剂进行交联反应，得到了使用纳米硅凝胶微交联的聚羧酸减水剂。由于这种聚羧酸减水剂的特殊分子结构，其分子链整体的吸水凝胶能力较原聚羧酸减水剂明显下降，在干燥过程中更容易形成固体而非含水量较高的胶体，保证干燥过程可以在较低温度、较快时间下进行，有效避免了聚羧酸减水剂分子在干燥过程中出现的分解和链转移现象，保证了固体聚羧酸的使用性能，避免了常规固体减水剂熔点低、易结块、性能差的缺点。并由于其中纳米硅凝胶结构的引入，该减水剂对于水泥水化过程有明显的加速诱导和结晶成核作用，对于所制备的混凝土的早期强度有明显的增强效果。
High-early-strength polycarboxylate superplasticizer easy to produce powder and preparation method of high-early-strength polycarboxylate superplasticizer
一种易制粉高早强聚羧酸减水剂及其制备方法
GUAN WENXUN (Autor:in) / CHENG GUANZHI (Autor:in) / XIE YONGJIANG (Autor:in) / WANG XI (Autor:in) / TAN YANBIN (Autor:in) / WENG ZHICAI (Autor:in) / FENG ZHONGWEI (Autor:in) / LI XIANGTAO (Autor:in) / LIU ZIKE (Autor:in) / ZHENG XINGUO (Autor:in)
03.01.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08J
Verarbeitung
,
WORKING-UP
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
/
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
| Europäisches Patentamt | 2016
| Europäisches Patentamt | 2016
| Europäisches Patentamt | 2016
Novel early-strength polycarboxylate superplasticizer
| Europäisches Patentamt | 2021