Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modified concrete admixture as well as preparation method and application thereof
The invention provides a modified concrete admixture as well as a preparation method and application thereof, the modified concrete admixture comprises a modified polycarboxylate superplasticizer, andthe polycarboxylate superplasticizer is formed by polymerizing an unsaturated carboxylic acid monomer, a polyether macromonomer and a hydrophobic monomer in a molar ratio of (4-6): 1: (0.2-0.3); wherein the unsaturated carboxylic acid monomer is acrylic acid and/or methacrylic acid; wherein the structural formula of the polyether macromonomer is shown as a formula I, in the formula I, R1, R2, R3and R4 are respectively and independently H or CH3, and b is an integer of 20-120; wherein the structural formula of the hydrophobic monomer is shown as a formula II, in the formula II, R5 is H or CH3, and R6 is alkyl with the carbon chain length of C8-C12. The polycarboxylate superplasticizer provided by the invention has the advantages of improved water reducing rate and good workability.
本发明提供改性混凝土外加剂及其制备方法和应用，所述改性混凝土外加剂包含改性聚羧酸减水剂，所述聚羧酸减水剂由摩尔比为4～6:1:0.2～0.3的不饱和羧酸单体、聚醚大单体和疏水单体聚合而成；其中，所述不饱和羧酸单体为丙烯酸和/或甲基丙烯酸；所述聚醚大单体的结构式如式I所示，式I中，R1、R2、R3和R4各自独立地为H或CH3，b为20～120的整数；所述疏水单体的结构式如式II所示，式II中，R5为H或CH3，R6为碳链长度为C8～C12的烷基。本发明所述聚羧酸减水剂具有提高的减水率，和易性好。
Modified concrete admixture as well as preparation method and application thereof
The invention provides a modified concrete admixture as well as a preparation method and application thereof, the modified concrete admixture comprises a modified polycarboxylate superplasticizer, andthe polycarboxylate superplasticizer is formed by polymerizing an unsaturated carboxylic acid monomer, a polyether macromonomer and a hydrophobic monomer in a molar ratio of (4-6): 1: (0.2-0.3); wherein the unsaturated carboxylic acid monomer is acrylic acid and/or methacrylic acid; wherein the structural formula of the polyether macromonomer is shown as a formula I, in the formula I, R1, R2, R3and R4 are respectively and independently H or CH3, and b is an integer of 20-120; wherein the structural formula of the hydrophobic monomer is shown as a formula II, in the formula II, R5 is H or CH3, and R6 is alkyl with the carbon chain length of C8-C12. The polycarboxylate superplasticizer provided by the invention has the advantages of improved water reducing rate and good workability.
本发明提供改性混凝土外加剂及其制备方法和应用，所述改性混凝土外加剂包含改性聚羧酸减水剂，所述聚羧酸减水剂由摩尔比为4～6:1:0.2～0.3的不饱和羧酸单体、聚醚大单体和疏水单体聚合而成；其中，所述不饱和羧酸单体为丙烯酸和/或甲基丙烯酸；所述聚醚大单体的结构式如式I所示，式I中，R1、R2、R3和R4各自独立地为H或CH3，b为20～120的整数；所述疏水单体的结构式如式II所示，式II中，R5为H或CH3，R6为碳链长度为C8～C12的烷基。本发明所述聚羧酸减水剂具有提高的减水率，和易性好。
Modified concrete admixture as well as preparation method and application thereof
改性混凝土外加剂及其制备方法和应用
ZHANG ZHIWEI (Autor:in)
20.11.2020
Patent
Elektronische Ressource
Chinesisch
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