Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Concrete water reducing agent and preparation method thereof
The invention relates to the technical field of building admixtures, in particular to a concrete water reducing agent and a preparation method thereof. The concrete water reducing agent comprises a photopolymerizable monomer selected from alkoxy polyethylene glycol esterification intermediates, and a photoinitiator which is benzoin. According to the concrete water reducing agent provided by the invention, the alkoxy polyethylene glycol esterification intermediate is adopted, slump retaining performance and water reducing performance can be both considered, meanwhile, the reaction can be carried out at normal temperature or low temperature, monomer prepolymerization is directly initiated through light irradiation, the polymerization rate is greatly increased, the synthesis conversion rate is increased, and the sensitivity is reduced; and in addition, the sulfonic acid group is added, so that the surfaces of cement particles can be stably adsorbed, the hydration reaction can be effectively delayed, the dispersing and slump retaining effects in concrete with medium and low strength grades are enhanced, and the market application prospect is extremely wide.
本发明涉及建筑外加剂技术领域，特别涉及一种混凝土减水剂及其制备方法，其中，所述混凝土减水剂包含：可光聚合单体，所述可光聚合单体选自烷氧基聚乙二醇酯化中间体；光引发剂，所述光引发剂为二苯乙醇酮。采用本发明提供的混凝土减水剂，采用烷氧基聚乙二醇酯化中间体，可以兼顾保坍性能及减水性能，同时反应可在常温或低温下进行，通过光照射直接引发单体预聚合，大幅提高聚合速率，提高合成转化率并且降低敏感性，此外，磺酸基团的加入能稳定吸附胶水泥颗粒表面，可有效延缓水化反应，增强中低强度等级的混凝土中的分散保坍效果，具有极为广泛的市场应用前景。
Concrete water reducing agent and preparation method thereof
The invention relates to the technical field of building admixtures, in particular to a concrete water reducing agent and a preparation method thereof. The concrete water reducing agent comprises a photopolymerizable monomer selected from alkoxy polyethylene glycol esterification intermediates, and a photoinitiator which is benzoin. According to the concrete water reducing agent provided by the invention, the alkoxy polyethylene glycol esterification intermediate is adopted, slump retaining performance and water reducing performance can be both considered, meanwhile, the reaction can be carried out at normal temperature or low temperature, monomer prepolymerization is directly initiated through light irradiation, the polymerization rate is greatly increased, the synthesis conversion rate is increased, and the sensitivity is reduced; and in addition, the sulfonic acid group is added, so that the surfaces of cement particles can be stably adsorbed, the hydration reaction can be effectively delayed, the dispersing and slump retaining effects in concrete with medium and low strength grades are enhanced, and the market application prospect is extremely wide.
本发明涉及建筑外加剂技术领域，特别涉及一种混凝土减水剂及其制备方法，其中，所述混凝土减水剂包含：可光聚合单体，所述可光聚合单体选自烷氧基聚乙二醇酯化中间体；光引发剂，所述光引发剂为二苯乙醇酮。采用本发明提供的混凝土减水剂，采用烷氧基聚乙二醇酯化中间体，可以兼顾保坍性能及减水性能，同时反应可在常温或低温下进行，通过光照射直接引发单体预聚合，大幅提高聚合速率，提高合成转化率并且降低敏感性，此外，磺酸基团的加入能稳定吸附胶水泥颗粒表面，可有效延缓水化反应，增强中低强度等级的混凝土中的分散保坍效果，具有极为广泛的市场应用前景。
Concrete water reducing agent and preparation method thereof
一种混凝土减水剂及其制备方法
LI WEI (Autor:in) / HUANG XIAOWEN (Autor:in) / MENG XIANGJIE (Autor:in)
27.04.2021
Patent
Elektronische Ressource
Chinesisch
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