Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of efficient powdery water reducing agent with siloxane structure
The invention discloses a preparation method of an efficient powdery water reducing agent with a siloxane structure, and belongs to the technical field of additives for functional concrete. An organosilicon monomer, methacrylic acid and a metacrylic acid ester monomer are subjected to a ternary polymerization reaction, such that the organosilicon-modified polycarboxylic acid superplasticizer is synthesized; and then star polycarboxylic acid macromolecules are generated through solution reaction to obtain a solid powder product. Silicon-containing active groups are modified on the polycarboxylic acid water reducing agent through organosilane modification, the working performance of the polycarboxylic acid water reducing agent is improved, the prepared powdery water reducing agent has the initial fluidity reaching 260 mm, the fluidity reaching 220 mm after 1 hour and the compressive strength reaching 55 MPa after 7 days through neat paste experiments, the good water reducing and slump retaining performance is achieved, the concrete mixing process is simplified, and the accurate control of the water reducing agent dosage is realized.
本发明公开了一种具有硅氧烷结构的高效粉状减水剂的制备方法，属于功能性混凝土用外加剂技术领域；主要采用有机硅单体与甲基丙烯酸及甲基丙烯酸酯类单体进行三元共聚反应，合成有机硅修饰改性的聚羧酸高效减水剂；再通过溶液反应生成星型聚羧酸大分子，得到固体粉末产物；本发明通过有机硅烷改性使聚羧酸减水剂修饰上含硅的活性基团提高其工作性能，制备的粉状减水剂采用净浆实验表明初始流动度达到260 mm，1小时后流动度达到220mm，7天抗压强度达到55MPa，具有良好的减水和保坍性能，简化了混凝土拌合工艺，实现了减水剂用量的精确控制。
Preparation method of efficient powdery water reducing agent with siloxane structure
The invention discloses a preparation method of an efficient powdery water reducing agent with a siloxane structure, and belongs to the technical field of additives for functional concrete. An organosilicon monomer, methacrylic acid and a metacrylic acid ester monomer are subjected to a ternary polymerization reaction, such that the organosilicon-modified polycarboxylic acid superplasticizer is synthesized; and then star polycarboxylic acid macromolecules are generated through solution reaction to obtain a solid powder product. Silicon-containing active groups are modified on the polycarboxylic acid water reducing agent through organosilane modification, the working performance of the polycarboxylic acid water reducing agent is improved, the prepared powdery water reducing agent has the initial fluidity reaching 260 mm, the fluidity reaching 220 mm after 1 hour and the compressive strength reaching 55 MPa after 7 days through neat paste experiments, the good water reducing and slump retaining performance is achieved, the concrete mixing process is simplified, and the accurate control of the water reducing agent dosage is realized.
本发明公开了一种具有硅氧烷结构的高效粉状减水剂的制备方法，属于功能性混凝土用外加剂技术领域；主要采用有机硅单体与甲基丙烯酸及甲基丙烯酸酯类单体进行三元共聚反应，合成有机硅修饰改性的聚羧酸高效减水剂；再通过溶液反应生成星型聚羧酸大分子，得到固体粉末产物；本发明通过有机硅烷改性使聚羧酸减水剂修饰上含硅的活性基团提高其工作性能，制备的粉状减水剂采用净浆实验表明初始流动度达到260 mm，1小时后流动度达到220mm，7天抗压强度达到55MPa，具有良好的减水和保坍性能，简化了混凝土拌合工艺，实现了减水剂用量的精确控制。
Preparation method of efficient powdery water reducing agent with siloxane structure
一种具有硅氧烷结构的高效粉状减水剂的制备方法
WANG FAZHOU (Autor:in) / ZHANG PING (Autor:in) / YANG RUILI (Autor:in) / LIU PENG (Autor:in) / TIAN YUJING (Autor:in)
11.02.2022
Patent
Elektronische Ressource
Chinesisch
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