Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Crosslinking type viscosity-reducing polycarboxylic acid mother liquor and preparation method thereof
The invention discloses a crosslinking type viscosity-reducing polycarboxylic acid mother liquor and a preparation method thereof. The polycarboxylic acid water reducer is formed by free radical polymerization of a vinyl glycol ether polyoxyethylene ether macromonomer (EPEG), a cross-linking agent and small monomers such as unsaturated carboxylic acids and esters, and the weight-average molecular weight of polycarboxylic acid is controlled to be not more than 60000 by using a chain transfer agent. The cross-linking type viscosity-reducing polycarboxylic acid mother liquor can obviously reduce the viscosity of concrete, has the advantages of high water-reducing rate, good adaptability and good slump retaining effect, is suitable for machine-made sand concrete with low water-binder ratio, high compressive strength grade and long pumping distance, is also suitable for ultra-high performance concrete, and is simple in preparation process, low in cost, high in production efficiency, environment-friendly and excellent in energy conservation.
本发明公开了一种交联型降粘聚羧酸母液及其制备方法。本发明中的聚羧酸减水剂由乙烯基乙二醇醚聚氧乙烯醚大单体(EPEG)、交联剂、不饱和羧酸类及酯类等小单体通过自由基聚合而成，并用链转移剂控制该聚羧酸重均分子量不超过60000。本发明的交联型降粘聚羧酸母液能够显著降低混凝土粘度，具有减水率高、适应性好、保坍效果好，适用于水胶比低、抗压强度等级高、泵送距离长的机制砂混凝土，也适用于超高性能混凝土、且制备工艺简单、成本低、生产效率高、环保节能佳。
Crosslinking type viscosity-reducing polycarboxylic acid mother liquor and preparation method thereof
The invention discloses a crosslinking type viscosity-reducing polycarboxylic acid mother liquor and a preparation method thereof. The polycarboxylic acid water reducer is formed by free radical polymerization of a vinyl glycol ether polyoxyethylene ether macromonomer (EPEG), a cross-linking agent and small monomers such as unsaturated carboxylic acids and esters, and the weight-average molecular weight of polycarboxylic acid is controlled to be not more than 60000 by using a chain transfer agent. The cross-linking type viscosity-reducing polycarboxylic acid mother liquor can obviously reduce the viscosity of concrete, has the advantages of high water-reducing rate, good adaptability and good slump retaining effect, is suitable for machine-made sand concrete with low water-binder ratio, high compressive strength grade and long pumping distance, is also suitable for ultra-high performance concrete, and is simple in preparation process, low in cost, high in production efficiency, environment-friendly and excellent in energy conservation.
本发明公开了一种交联型降粘聚羧酸母液及其制备方法。本发明中的聚羧酸减水剂由乙烯基乙二醇醚聚氧乙烯醚大单体(EPEG)、交联剂、不饱和羧酸类及酯类等小单体通过自由基聚合而成，并用链转移剂控制该聚羧酸重均分子量不超过60000。本发明的交联型降粘聚羧酸母液能够显著降低混凝土粘度，具有减水率高、适应性好、保坍效果好，适用于水胶比低、抗压强度等级高、泵送距离长的机制砂混凝土，也适用于超高性能混凝土、且制备工艺简单、成本低、生产效率高、环保节能佳。
Crosslinking type viscosity-reducing polycarboxylic acid mother liquor and preparation method thereof
一种交联型降粘聚羧酸母液及其制备方法
TAN HONGLIN (Autor:in) / DUAN ZHIYING (Autor:in)
09.01.2024
Patent
Elektronische Ressource
Chinesisch
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