Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Anti-crack plastering mortar dry powder for external walls
The invention provides anti-crack plastering mortar dry powder for external walls. The obtained dry mortar powder is used for plastering the surface of an external wall and has high adhesion and few cracks. During construction, water consumption is small, the operation is convenient, the workability is good, and the structure is compact. In order to achieve the purpose, the technical scheme as follows is adopted: the anti-crack plastering mortar dry powder for external walls consists of the following raw materials in parts by weight: 45-65 parts of Yellow River sand, 18-28 parts of cement, 12-22 parts of fly ash and 0.4-1.4 parts of a self-made adhesive. The self-made adhesive is prepared according to the following steps of: S1, adding polyvinyl alcohol into water with the weight being 6-8 times of that of the polyvinyl alcohol for dissolving, adding a 30% hydrogen peroxide solution, stirring and reacting for half an hour, adding dextrin water slurry, continuing to stir and react for half an hour, and spray-drying to obtain dextrin modified polyvinyl alcohol particles; S2, adding methyltrimethoxysilane into water of which the weight is 10-15 times that of the methyltrimethoxysilane, stirring to obtain a solution, adjusting the pH value to 2-3 by using hydrochloric acid, then heating to 40-50 DEG C, hydrolyzing for 10-15 hours to obtain a cross-linked solution, then adding hydroxypropyl methyl cellulose into the cross-linked solution, stirring and mixing well, and spray-drying to obtain silane modified hydroxypropyl methyl cellulose; and S3, well mixing the dextrin modified polyvinyl alcohol particles obtained in the step S1 and the silane modified hydroxypropyl methyl cellulose obtained in the step S2 according to a mass ratio of (10-15): 1 to obtain the self-made adhesive.
本发明提供了一种外墙体抗裂抹面砂浆干粉，所得砂浆干粉用于外墙体表面抹灰，粘结度高，裂缝少；施工时用水量小，操作方便，和易性能好，结构紧实。为实现上述目的，通过以下技术方案实现∶一种外墙体抗裂抹面砂浆干粉，以重量份计，由以下原料组成∶黄河砂45‑65份，水泥18‑28份，粉煤灰12‑22份，自制粘合剂0.4‑1.4份。所述自制粘合剂按照以下步骤得到：S1、将聚乙烯醇加入重量为6‑8倍的水中溶解，加入30%过氧化氢溶液，搅拌反应半小时，加入糊精水浆液，继续搅拌反应半小时，喷雾干燥，得到糊精改性聚乙烯醇颗粒;S2、将甲基三甲氧基硅烷加入重量为10‑15倍的水中搅拌得到溶液，用盐酸调节pH至2‑3，然后升温至40‑50℃水解10‑15小时，得到交联溶液，然后向其中加入羟丙基甲基纤维素，搅拌混匀，喷雾干燥，得到硅烷改性羟丙基甲基纤维素;S3、将S1所得糊精改性聚乙烯醇颗粒和S2所得硅烷改性羟丙基甲基纤维素按照质量比10‑15∶1的比例混合均匀，得到自制粘合剂。
Anti-crack plastering mortar dry powder for external walls
The invention provides anti-crack plastering mortar dry powder for external walls. The obtained dry mortar powder is used for plastering the surface of an external wall and has high adhesion and few cracks. During construction, water consumption is small, the operation is convenient, the workability is good, and the structure is compact. In order to achieve the purpose, the technical scheme as follows is adopted: the anti-crack plastering mortar dry powder for external walls consists of the following raw materials in parts by weight: 45-65 parts of Yellow River sand, 18-28 parts of cement, 12-22 parts of fly ash and 0.4-1.4 parts of a self-made adhesive. The self-made adhesive is prepared according to the following steps of: S1, adding polyvinyl alcohol into water with the weight being 6-8 times of that of the polyvinyl alcohol for dissolving, adding a 30% hydrogen peroxide solution, stirring and reacting for half an hour, adding dextrin water slurry, continuing to stir and react for half an hour, and spray-drying to obtain dextrin modified polyvinyl alcohol particles; S2, adding methyltrimethoxysilane into water of which the weight is 10-15 times that of the methyltrimethoxysilane, stirring to obtain a solution, adjusting the pH value to 2-3 by using hydrochloric acid, then heating to 40-50 DEG C, hydrolyzing for 10-15 hours to obtain a cross-linked solution, then adding hydroxypropyl methyl cellulose into the cross-linked solution, stirring and mixing well, and spray-drying to obtain silane modified hydroxypropyl methyl cellulose; and S3, well mixing the dextrin modified polyvinyl alcohol particles obtained in the step S1 and the silane modified hydroxypropyl methyl cellulose obtained in the step S2 according to a mass ratio of (10-15): 1 to obtain the self-made adhesive.
本发明提供了一种外墙体抗裂抹面砂浆干粉，所得砂浆干粉用于外墙体表面抹灰，粘结度高，裂缝少；施工时用水量小，操作方便，和易性能好，结构紧实。为实现上述目的，通过以下技术方案实现∶一种外墙体抗裂抹面砂浆干粉，以重量份计，由以下原料组成∶黄河砂45‑65份，水泥18‑28份，粉煤灰12‑22份，自制粘合剂0.4‑1.4份。所述自制粘合剂按照以下步骤得到：S1、将聚乙烯醇加入重量为6‑8倍的水中溶解，加入30%过氧化氢溶液，搅拌反应半小时，加入糊精水浆液，继续搅拌反应半小时，喷雾干燥，得到糊精改性聚乙烯醇颗粒;S2、将甲基三甲氧基硅烷加入重量为10‑15倍的水中搅拌得到溶液，用盐酸调节pH至2‑3，然后升温至40‑50℃水解10‑15小时，得到交联溶液，然后向其中加入羟丙基甲基纤维素，搅拌混匀，喷雾干燥，得到硅烷改性羟丙基甲基纤维素;S3、将S1所得糊精改性聚乙烯醇颗粒和S2所得硅烷改性羟丙基甲基纤维素按照质量比10‑15∶1的比例混合均匀，得到自制粘合剂。
Anti-crack plastering mortar dry powder for external walls
一种外墙体抗裂抹面砂浆干粉
HUANG YONG (Autor:in) / LI XIANG (Autor:in)
25.02.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Anti-crack plastering mortar and preparation method thereof
| Europäisches Patentamt | 2021
Anti-crack plastering mortar and preparation method thereof
| Europäisches Patentamt | 2024
Anti-crack plastering mortar and preparation method thereof
| Europäisches Patentamt | 2023