A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Slow-release defoaming type graft modified silicon dioxide material as well as preparation method and application thereof
The invention provides a slow-release defoaming type graft modified silicon dioxide material capable of regulating and controlling the gas content of concrete in real time, a preparation method and application. The material is prepared by connecting a siloxane group-containing modified monomer on the surface of a silicon dioxide material through a silicon-oxygen bond, the siloxane group-containing modified monomer is composed of a siloxane group, an acid anhydride group and long-chain alkyl alcohol polyether, the acid anhydride group is connected with the siloxane group through an amido bond, and the acid anhydride group is connected with the long-chain alkyl alcohol polyether through an ester bond. The siloxane group-containing modified monomer is hydrolyzed under an alkaline condition to release the long-chain alkyl alcohol polyether with a defoaming function. When the material is added into concrete, the early stage of concrete stirring can be achieved without defoaming, fresh concrete has good workability, the defoaming agent is slowly released in the later stage, the air content in the concrete is reduced, the strength and durability of the hardened concrete are improved, and the appearance of the hardened concrete can be beautified.
本发明提供一种能够实时调控混凝土含气量的缓释消泡型接枝改性二氧化硅材料、制备方法及应用。该材料由在二氧化硅材料的表面通过硅氧键连接含硅氧烷基改性单体制成；含硅氧烷基改性单体由硅氧烷基、酸酐基和长链烷基醇聚醚构成，且酸酐基通过酰胺键连接硅氧烷基，酸酐基通过酯键连接长链烷基醇聚醚。含硅氧烷基改性单体在碱性条件下水解释放具有消泡功能的长链烷基醇聚醚。该材料添加到混凝土中可以达到混凝土搅拌的初期不消泡，使新拌混凝土具有较好的和易性，而在后期缓慢释放出消泡剂，降低混凝土中的含气量，从而提高硬化混凝土的强度和耐久性，并且可以美化硬化混凝土的外观。
Slow-release defoaming type graft modified silicon dioxide material as well as preparation method and application thereof
The invention provides a slow-release defoaming type graft modified silicon dioxide material capable of regulating and controlling the gas content of concrete in real time, a preparation method and application. The material is prepared by connecting a siloxane group-containing modified monomer on the surface of a silicon dioxide material through a silicon-oxygen bond, the siloxane group-containing modified monomer is composed of a siloxane group, an acid anhydride group and long-chain alkyl alcohol polyether, the acid anhydride group is connected with the siloxane group through an amido bond, and the acid anhydride group is connected with the long-chain alkyl alcohol polyether through an ester bond. The siloxane group-containing modified monomer is hydrolyzed under an alkaline condition to release the long-chain alkyl alcohol polyether with a defoaming function. When the material is added into concrete, the early stage of concrete stirring can be achieved without defoaming, fresh concrete has good workability, the defoaming agent is slowly released in the later stage, the air content in the concrete is reduced, the strength and durability of the hardened concrete are improved, and the appearance of the hardened concrete can be beautified.
本发明提供一种能够实时调控混凝土含气量的缓释消泡型接枝改性二氧化硅材料、制备方法及应用。该材料由在二氧化硅材料的表面通过硅氧键连接含硅氧烷基改性单体制成；含硅氧烷基改性单体由硅氧烷基、酸酐基和长链烷基醇聚醚构成，且酸酐基通过酰胺键连接硅氧烷基，酸酐基通过酯键连接长链烷基醇聚醚。含硅氧烷基改性单体在碱性条件下水解释放具有消泡功能的长链烷基醇聚醚。该材料添加到混凝土中可以达到混凝土搅拌的初期不消泡，使新拌混凝土具有较好的和易性，而在后期缓慢释放出消泡剂，降低混凝土中的含气量，从而提高硬化混凝土的强度和耐久性，并且可以美化硬化混凝土的外观。
Slow-release defoaming type graft modified silicon dioxide material as well as preparation method and application thereof
一种缓释消泡型接枝改性二氧化硅材料、制备方法及应用
SHAN GUANGCHENG (author) / QIAO MIN (author) / GAO NANXIAO (author) / CHEN JIAN (author) / SHEN FEI (author) / YANG TAO (author) / RAN QIANPING (author) / ZHU BOSONG (author) / ZENG LUPING (author)
2024-01-16
Patent
Electronic Resource
Chinese
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