A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Concrete for prefabricated part and preparation method thereof
Concrete for prefabricated parts and a preparing method thereof are disclosed, the concrete comprises, by weight, 120-180 parts of cement, 80-130 parts of sand, 220-300 parts of broken stone, 60-100 parts of slag powder, 13-18.5 parts of a superplasticizer, 1-3 parts of a waterproof impermeable agent and 80-120 parts of water, and the superplasticizer is formed by copolymerization of acrylic acid,unsaturated polyoxyethylene ether and maleic anhydride modified cellulose as comonomers. According to the invention, a superplasticizer is introduced into concrete, the superplasticizer is formed bycopolymerization reaction of acrylic acid, unsaturated polyoxyethylene ether and maleic anhydride modified cellulose as comonomers, and the maleic anhydride modified cellulose is obtained by introducing a vinyl group to a cellulose chain through maleic acylation. According to the preparation method, cellulose and maleic anhydride are used as raw materials and subjected to a copolymerization reaction with acrylic acid and unsaturated polyoxyethylene ether, carboxyl generated after cellulose and maleic anhydride are subjected to ring opening is introduced into a main chain of the superplasticizer, the carboxyl group density of the superplasticizer is increased, and the slump of concrete is kept good.
一种预制构件用混凝土及其制备方法，按重量份计包括水泥120‑180份、砂80‑130份、碎石220‑300份、矿渣粉60‑100份、高效减水剂13‑18.5份、防水抗渗剂1‑3份和水80‑120份，其中，高效减水剂是以丙烯酸、不饱和聚氧乙烯醚和马来酸酐改性纤维素为共聚单体共聚反应而成；本发明在混凝土中引入了高效减水剂，其中，高效减水剂是将丙烯酸、不饱和聚氧乙烯醚和马来酸酐改性纤维素为共聚单体共聚反应而成，其中马来酸酐改性纤维素是通过马来酰化将乙烯基基团引入到纤维素链上，使之与丙烯酸、不饱和聚氧乙烯醚发生共聚反应，将纤维素和马来酸酐开环后生成的羧基均引入到高效减水剂的主链上，增大了高效减水剂的羧基基团密度，使得混凝土的坍落度保持良好。
Concrete for prefabricated part and preparation method thereof
Concrete for prefabricated parts and a preparing method thereof are disclosed, the concrete comprises, by weight, 120-180 parts of cement, 80-130 parts of sand, 220-300 parts of broken stone, 60-100 parts of slag powder, 13-18.5 parts of a superplasticizer, 1-3 parts of a waterproof impermeable agent and 80-120 parts of water, and the superplasticizer is formed by copolymerization of acrylic acid,unsaturated polyoxyethylene ether and maleic anhydride modified cellulose as comonomers. According to the invention, a superplasticizer is introduced into concrete, the superplasticizer is formed bycopolymerization reaction of acrylic acid, unsaturated polyoxyethylene ether and maleic anhydride modified cellulose as comonomers, and the maleic anhydride modified cellulose is obtained by introducing a vinyl group to a cellulose chain through maleic acylation. According to the preparation method, cellulose and maleic anhydride are used as raw materials and subjected to a copolymerization reaction with acrylic acid and unsaturated polyoxyethylene ether, carboxyl generated after cellulose and maleic anhydride are subjected to ring opening is introduced into a main chain of the superplasticizer, the carboxyl group density of the superplasticizer is increased, and the slump of concrete is kept good.
一种预制构件用混凝土及其制备方法，按重量份计包括水泥120‑180份、砂80‑130份、碎石220‑300份、矿渣粉60‑100份、高效减水剂13‑18.5份、防水抗渗剂1‑3份和水80‑120份，其中，高效减水剂是以丙烯酸、不饱和聚氧乙烯醚和马来酸酐改性纤维素为共聚单体共聚反应而成；本发明在混凝土中引入了高效减水剂，其中，高效减水剂是将丙烯酸、不饱和聚氧乙烯醚和马来酸酐改性纤维素为共聚单体共聚反应而成，其中马来酸酐改性纤维素是通过马来酰化将乙烯基基团引入到纤维素链上，使之与丙烯酸、不饱和聚氧乙烯醚发生共聚反应，将纤维素和马来酸酐开环后生成的羧基均引入到高效减水剂的主链上，增大了高效减水剂的羧基基团密度，使得混凝土的坍落度保持良好。
Concrete for prefabricated part and preparation method thereof
一种预制构件用混凝土及其制备方法
WANG XINGWEN (author) / XU RONGPING (author) / JIN LINA (author)
2020-11-10
Patent
Electronic Resource
Chinese
Recycled concrete, recycled concrete prefabricated part and preparation method thereof
| European Patent Office | 2021
| European Patent Office | 2024
Anti-crack concrete prefabricated part and preparation method thereof
| European Patent Office | 2024
Recycled asphalt concrete prefabricated part and preparation method thereof
| European Patent Office | 2024