Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Concrete admixture and preparation method thereof
The invention provides a concrete admixture and a preparation method thereof. The preparation method comprises the following steps: preparing calcium silicate and magnesium silicate nanoparticles by taking a magnesium nitrate aqueous solution, a sodium silicate aqueous solution, tetraethyl orthosilicate, calcium nitrate and the like as raw materials; modifying the halloysite nanotube by using N-([beta]-aminoethyl-[gamma]-aminopropyl triethoxysilane to obtain a modified halloysite nanotube, and reacting the modified halloysite nanotube with the epoxidized bark powder to obtain modified bark powder; and finally, taking acrylamide and N-(4-aminophenyl)acrylamide as raw materials to carry out polymerization reaction, and adding calcium silicate and magnesium silicate nanoparticles and the modified bark powder in the polymerization process. The concrete admixture is helpful for greatly accelerating early hydration of cement, has a good early strength effect, has a very good adsorption and solidification effect on chloride ions, and prevents concrete from being eroded and damaged by the chloride ions.
本发明提供了一种混凝土外加剂及其制备方法，先以硝酸镁水溶液、硅酸钠水溶液、正硅酸四乙酯、硝酸钙等为原料制得硅酸钙‑硅酸镁纳米粒子；然后将埃洛石纳米管利用N‑(β‑氨乙基)‑γ‑氨丙基三乙氧基硅烷进行改性处理，得到改性埃洛石纳米管，接着将改性埃洛石纳米管与环氧化树皮粉末反应，得到改性树皮粉末；最后以丙烯酰胺、N‑(4‑氨基苯基)丙烯酰胺为原料进行聚合反应，在聚合过程中加入硅酸钙‑硅酸镁纳米粒子和改性树皮粉末即得。该混凝土外加剂有助于大幅度加速水泥早期水化，早强效果好，并且对氯离子具有很好的吸附固化作用，避免了混凝土被氯离子侵蚀破坏。
Concrete admixture and preparation method thereof
The invention provides a concrete admixture and a preparation method thereof. The preparation method comprises the following steps: preparing calcium silicate and magnesium silicate nanoparticles by taking a magnesium nitrate aqueous solution, a sodium silicate aqueous solution, tetraethyl orthosilicate, calcium nitrate and the like as raw materials; modifying the halloysite nanotube by using N-([beta]-aminoethyl-[gamma]-aminopropyl triethoxysilane to obtain a modified halloysite nanotube, and reacting the modified halloysite nanotube with the epoxidized bark powder to obtain modified bark powder; and finally, taking acrylamide and N-(4-aminophenyl)acrylamide as raw materials to carry out polymerization reaction, and adding calcium silicate and magnesium silicate nanoparticles and the modified bark powder in the polymerization process. The concrete admixture is helpful for greatly accelerating early hydration of cement, has a good early strength effect, has a very good adsorption and solidification effect on chloride ions, and prevents concrete from being eroded and damaged by the chloride ions.
本发明提供了一种混凝土外加剂及其制备方法，先以硝酸镁水溶液、硅酸钠水溶液、正硅酸四乙酯、硝酸钙等为原料制得硅酸钙‑硅酸镁纳米粒子；然后将埃洛石纳米管利用N‑(β‑氨乙基)‑γ‑氨丙基三乙氧基硅烷进行改性处理，得到改性埃洛石纳米管，接着将改性埃洛石纳米管与环氧化树皮粉末反应，得到改性树皮粉末；最后以丙烯酰胺、N‑(4‑氨基苯基)丙烯酰胺为原料进行聚合反应，在聚合过程中加入硅酸钙‑硅酸镁纳米粒子和改性树皮粉末即得。该混凝土外加剂有助于大幅度加速水泥早期水化，早强效果好，并且对氯离子具有很好的吸附固化作用，避免了混凝土被氯离子侵蚀破坏。
Concrete admixture and preparation method thereof
混凝土外加剂及其制备方法
LING CHIYING (Autor:in)
06.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Concrete admixture, preparation method thereof and concrete added with concrete admixture
| Europäisches Patentamt | 2020