Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Concrete admixture as well as preparation method and application thereof
The invention belongs to the technical field of concrete admixtures, and relates to a concrete admixture as well as a preparation method and application thereof. The preparation method of the concrete admixture comprises the following steps: dropwise adding an acrylamide solution into an alkaline solution of cyanuric chloride, and continuously reacting after dropwise adding to obtain a functional monomer; the preparation method comprises the following steps: dispersing a functional monomer, a polyether monomer, silanol, an oxidant and a reducing agent I in water, dropwise adding a dropwise adding solution I and a dropwise adding solution II into the obtained dispersion liquid, controlling the initial dropwise adding temperature to be 10-15 DEG C, controlling the dropwise adding temperature to be 10-15 DEG C, and reacting for 1-2 hours; and after the materials are dropwise added, carrying out heat preservation reaction, and adjusting the pH value of the system to 5-6 after the reaction is finished. The preparation method is characterized in that the functional monomer and silanol are introduced into polycarboxylic acid, so that the gas content of concrete can be effectively reduced, the workability of the concrete is improved, the number of pores on the surface of the concrete is reduced, and the porosity is reduced.
本发明属于混凝土外加剂技术领域，涉及一种混凝土外加剂及其制备方法和应用。所述混凝土外加剂的制备方法包括将丙烯酰胺溶液滴加至三聚氰氯的碱性溶液中，滴加完毕后继续反应，得到功能单体；将功能单体、聚醚单体、硅烷醇、氧化剂和还原剂Ⅰ分散于水中，再往所得分散液中滴加滴加液Ⅰ和滴加液Ⅱ，所述滴加液Ⅰ为不饱和羧酸的水溶液，所述滴加液Ⅱ为还原剂Ⅱ和链转移剂的混合水溶液，将起始滴加温度控制在10‑15℃，待物料滴加完毕后保温反应，反应完毕后将体系的pH值调节至5‑6。本发明的关键在于将功能单体和硅烷醇引入聚羧酸中，由此可以有效降低混凝土的含气量，改善混凝土的和易性，减少混凝土表面气孔数量并降低孔隙率。
Concrete admixture as well as preparation method and application thereof
The invention belongs to the technical field of concrete admixtures, and relates to a concrete admixture as well as a preparation method and application thereof. The preparation method of the concrete admixture comprises the following steps: dropwise adding an acrylamide solution into an alkaline solution of cyanuric chloride, and continuously reacting after dropwise adding to obtain a functional monomer; the preparation method comprises the following steps: dispersing a functional monomer, a polyether monomer, silanol, an oxidant and a reducing agent I in water, dropwise adding a dropwise adding solution I and a dropwise adding solution II into the obtained dispersion liquid, controlling the initial dropwise adding temperature to be 10-15 DEG C, controlling the dropwise adding temperature to be 10-15 DEG C, and reacting for 1-2 hours; and after the materials are dropwise added, carrying out heat preservation reaction, and adjusting the pH value of the system to 5-6 after the reaction is finished. The preparation method is characterized in that the functional monomer and silanol are introduced into polycarboxylic acid, so that the gas content of concrete can be effectively reduced, the workability of the concrete is improved, the number of pores on the surface of the concrete is reduced, and the porosity is reduced.
本发明属于混凝土外加剂技术领域，涉及一种混凝土外加剂及其制备方法和应用。所述混凝土外加剂的制备方法包括将丙烯酰胺溶液滴加至三聚氰氯的碱性溶液中，滴加完毕后继续反应，得到功能单体；将功能单体、聚醚单体、硅烷醇、氧化剂和还原剂Ⅰ分散于水中，再往所得分散液中滴加滴加液Ⅰ和滴加液Ⅱ，所述滴加液Ⅰ为不饱和羧酸的水溶液，所述滴加液Ⅱ为还原剂Ⅱ和链转移剂的混合水溶液，将起始滴加温度控制在10‑15℃，待物料滴加完毕后保温反应，反应完毕后将体系的pH值调节至5‑6。本发明的关键在于将功能单体和硅烷醇引入聚羧酸中，由此可以有效降低混凝土的含气量，改善混凝土的和易性，减少混凝土表面气孔数量并降低孔隙率。
Concrete admixture as well as preparation method and application thereof
一种混凝土外加剂及其制备方法和应用
YANG QIAO (Autor:in) / CHEN YONGZHONG (Autor:in) / YAO LIANGKE (Autor:in) / YAN QIONG (Autor:in)
11.06.2024
Patent
Elektronische Ressource
Chinesisch
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