Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Slump-retaining early-strength polycarboxylate superplasticizer as well as preparation method and application thereof
The invention relates to a slump-retaining early-strength polycarboxylate superplasticizer as well as a preparation method and application thereof. According to the invention, polyether macromonomerswith slump retaining property or high water reducing property and early strength are adopted, unsaturated small monomers with very strong polarity are introduced in a synthesis process, and the slump-retaining early-strength polycarboxylate superplasticizer is prepared by adopting a double-dropwise adding mode under the action of an oxidation-reduction initiating system according to a free radicalpolymerization principle. The slump-retaining early-strength polycarboxylate superplasticizer of the invention remarkably improves early strength of the concrete, has outstanding slump retaining performance and good adaptability, does not influence later strength, contains no sulfate ions and chloride ions, and can be used for reinforced concrete and prefabricated parts. The slump-retaining early-strength polycarboxylate superplasticizer has the advantages of high water reducing rate, short setting time, simple and easily-controlled production technique, energy conservation performance, environment friendliness and no pollution.
本发明涉及一种保坍早强型聚羧酸减水剂及其制备方法与应用，本发明采用具有保坍或高减水性、早强性的聚醚大单体，在合成过程中引入极性很强的不饱和小单体，根据自由基聚合原理，在氧化‑还原引发体系下作用，采用双滴加方式，制备得到一种保坍早强型聚羧酸减水剂。本发明显著提高了混凝土的早期强度，同时保坍型能突出，适应性好，不影响后期强度，又不含硫酸根离子和氯离子，可用于钢筋混凝土和预制构件。本发明的保坍早强型聚羧酸减水剂减水率高、凝结时间短，生产工艺简单易控制，最重要节能环保，无污染。
Slump-retaining early-strength polycarboxylate superplasticizer as well as preparation method and application thereof
The invention relates to a slump-retaining early-strength polycarboxylate superplasticizer as well as a preparation method and application thereof. According to the invention, polyether macromonomerswith slump retaining property or high water reducing property and early strength are adopted, unsaturated small monomers with very strong polarity are introduced in a synthesis process, and the slump-retaining early-strength polycarboxylate superplasticizer is prepared by adopting a double-dropwise adding mode under the action of an oxidation-reduction initiating system according to a free radicalpolymerization principle. The slump-retaining early-strength polycarboxylate superplasticizer of the invention remarkably improves early strength of the concrete, has outstanding slump retaining performance and good adaptability, does not influence later strength, contains no sulfate ions and chloride ions, and can be used for reinforced concrete and prefabricated parts. The slump-retaining early-strength polycarboxylate superplasticizer has the advantages of high water reducing rate, short setting time, simple and easily-controlled production technique, energy conservation performance, environment friendliness and no pollution.
本发明涉及一种保坍早强型聚羧酸减水剂及其制备方法与应用，本发明采用具有保坍或高减水性、早强性的聚醚大单体，在合成过程中引入极性很强的不饱和小单体，根据自由基聚合原理，在氧化‑还原引发体系下作用，采用双滴加方式，制备得到一种保坍早强型聚羧酸减水剂。本发明显著提高了混凝土的早期强度，同时保坍型能突出，适应性好，不影响后期强度，又不含硫酸根离子和氯离子，可用于钢筋混凝土和预制构件。本发明的保坍早强型聚羧酸减水剂减水率高、凝结时间短，生产工艺简单易控制，最重要节能环保，无污染。
Slump-retaining early-strength polycarboxylate superplasticizer as well as preparation method and application thereof
一种保坍早强型聚羧酸减水剂及其制备方法与应用
NI RONGFENG (Autor:in) / CHEN DI (Autor:in) / YANG ZHONGJUN (Autor:in) / JIANG ZHENGWU (Autor:in) / WU QISHENG (Autor:in) / SONG BO (Autor:in)
09.02.2021
Patent
Elektronische Ressource
Chinesisch
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