A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of silane modified anti-clay water reducing agent and anti-clay performance evaluation method
The invention relates to a preparation method and an anti-clay performance evaluation method of a silane modified anti-clay water reducing agent, and belongs to the field of optimal design of concrete admixtures. The problem that the water reducing effect of the polycarboxylate superplasticizer in a clay-containing environment is affected due to poor clay resistance of the polycarboxylate superplasticizer is solved, and the modified polycarboxylate superplasticizer is synthesized by adding the silane coupling agent, so that the working efficiency of the polycarboxylate superplasticizer in the clay-containing environment is improved. Considering from the molecular structure, a C = C double bond in a silane functional group can be subjected to addition polymerization reaction with an unsaturated compound, and the reaction requirement of the addition polymerization reaction is the same as that of a polycarboxylate superplasticizer synthesis process, so that the silane functional group has the possibility of being grafted on a main link of a common polycarboxylate superplasticizer. The synthesized modified polycarboxylate superplasticizer with the silane side chain can be chemically bonded with the surface of a clay inorganic substance, so that intercalation adsorption with clay is avoided, and the influence of the clay on the performance of the polycarboxylate superplasticizer is remarkably reduced. The method can be used for optimizing the water reducing agent.
一种硅烷改性抗黏土型减水剂的制备及抗黏土性能评价方法，它属于混凝土外加剂优化设计领域。本发明解决了聚羧酸减水剂抗黏土能力差，进而影响聚羧酸减水剂在含黏土环境中的减水效果的问题，本发明添加硅烷偶联剂合成改性聚羧酸减水剂，以提高含黏土环境下聚羧酸减水剂的工作效率。从分子结构上考虑，硅烷官能团中的C＝C双键可与不饱和化合物发生加聚反应，这种加聚反应的反应要求与聚羧酸减水剂合成过程相同，因此硅烷官能团具有接枝在普通聚羧酸减水剂主连上的可能性。合成后的带有硅烷侧链的改性聚羧酸减水剂能与黏土类无机物质表面发生化学键合，避免与黏土的插层吸附，使黏土对聚羧酸减水剂性能的影响显著降低。本发明可以用于优化减水剂。
Preparation method of silane modified anti-clay water reducing agent and anti-clay performance evaluation method
The invention relates to a preparation method and an anti-clay performance evaluation method of a silane modified anti-clay water reducing agent, and belongs to the field of optimal design of concrete admixtures. The problem that the water reducing effect of the polycarboxylate superplasticizer in a clay-containing environment is affected due to poor clay resistance of the polycarboxylate superplasticizer is solved, and the modified polycarboxylate superplasticizer is synthesized by adding the silane coupling agent, so that the working efficiency of the polycarboxylate superplasticizer in the clay-containing environment is improved. Considering from the molecular structure, a C = C double bond in a silane functional group can be subjected to addition polymerization reaction with an unsaturated compound, and the reaction requirement of the addition polymerization reaction is the same as that of a polycarboxylate superplasticizer synthesis process, so that the silane functional group has the possibility of being grafted on a main link of a common polycarboxylate superplasticizer. The synthesized modified polycarboxylate superplasticizer with the silane side chain can be chemically bonded with the surface of a clay inorganic substance, so that intercalation adsorption with clay is avoided, and the influence of the clay on the performance of the polycarboxylate superplasticizer is remarkably reduced. The method can be used for optimizing the water reducing agent.
一种硅烷改性抗黏土型减水剂的制备及抗黏土性能评价方法，它属于混凝土外加剂优化设计领域。本发明解决了聚羧酸减水剂抗黏土能力差，进而影响聚羧酸减水剂在含黏土环境中的减水效果的问题，本发明添加硅烷偶联剂合成改性聚羧酸减水剂，以提高含黏土环境下聚羧酸减水剂的工作效率。从分子结构上考虑，硅烷官能团中的C＝C双键可与不饱和化合物发生加聚反应，这种加聚反应的反应要求与聚羧酸减水剂合成过程相同，因此硅烷官能团具有接枝在普通聚羧酸减水剂主连上的可能性。合成后的带有硅烷侧链的改性聚羧酸减水剂能与黏土类无机物质表面发生化学键合，避免与黏土的插层吸附，使黏土对聚羧酸减水剂性能的影响显著降低。本发明可以用于优化减水剂。
Preparation method of silane modified anti-clay water reducing agent and anti-clay performance evaluation method
一种硅烷改性抗黏土型减水剂的制备及抗黏土性能评价方法
WANG RUI (author) / LIN JINHUI (author) / REN ZHENYANG (author)
2023-03-21
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
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
/
G01N
Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften
,
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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