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Preparation method of retarder applied to preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses a preparation method of a retarder applied to preparation of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of buildingmaterials. The preparation method of the retarder comprises the following steps: uniformly mixing sodium gluconate, sodium citrate, sodium tripolyphosphate, sodium pyrophosphate, ammonium borate and water, adjusting the pH value of the solution to 5.5-6.5, adding magnesium sulfate, introducing nitrogen, and adding ferrous sulfate at 60 DEG C for free radical polymerization; observing the reactiontemperature, starting timing when the temperature is the highest, and obtaining the retarder after 2 hours. The composite water reducing agent containing the retarder prepared by adopting the processdisclosed by the invention can adjust the setting time of concrete and improve the performance of the concrete, and also has the effects of specifically improving the net slurry fluidity of the concrete, reducing the construction energy consumption and the like.
本发明公开了一种应用于制备改性木薯淀粉‑聚羧酸复合减水剂的缓凝剂的制备方法，属于建筑材料领域。所述缓凝剂的制备方法，包括以下步骤：将葡萄糖酸钠、柠檬酸钠、三聚磷酸钠、焦磷酸钠、硼酸铵和水混合均匀，并调节溶液pH至5.5‑6.5，加入硫酸镁，同时通入氮气，60℃时加入硫酸亚铁进行自由基聚合；观察反应温度，温度最高时开始计时，2h后获得所述缓凝剂。采用本发明工艺制备的含缓凝剂的复合减水剂，能调节混泥土的凝结时间，并改善混泥土的性能，同时还具体提升混泥土的净浆流动度，减少施工能耗等功效。
Preparation method of retarder applied to preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses a preparation method of a retarder applied to preparation of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of buildingmaterials. The preparation method of the retarder comprises the following steps: uniformly mixing sodium gluconate, sodium citrate, sodium tripolyphosphate, sodium pyrophosphate, ammonium borate and water, adjusting the pH value of the solution to 5.5-6.5, adding magnesium sulfate, introducing nitrogen, and adding ferrous sulfate at 60 DEG C for free radical polymerization; observing the reactiontemperature, starting timing when the temperature is the highest, and obtaining the retarder after 2 hours. The composite water reducing agent containing the retarder prepared by adopting the processdisclosed by the invention can adjust the setting time of concrete and improve the performance of the concrete, and also has the effects of specifically improving the net slurry fluidity of the concrete, reducing the construction energy consumption and the like.
本发明公开了一种应用于制备改性木薯淀粉‑聚羧酸复合减水剂的缓凝剂的制备方法，属于建筑材料领域。所述缓凝剂的制备方法，包括以下步骤：将葡萄糖酸钠、柠檬酸钠、三聚磷酸钠、焦磷酸钠、硼酸铵和水混合均匀，并调节溶液pH至5.5‑6.5，加入硫酸镁，同时通入氮气，60℃时加入硫酸亚铁进行自由基聚合；观察反应温度，温度最高时开始计时，2h后获得所述缓凝剂。采用本发明工艺制备的含缓凝剂的复合减水剂，能调节混泥土的凝结时间，并改善混泥土的性能，同时还具体提升混泥土的净浆流动度，减少施工能耗等功效。
Preparation method of retarder applied to preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
应用于制备改性木薯淀粉-聚羧酸复合减水剂的缓凝剂的制备方法
PEI KEMIN (author) / LI XUEDONG (author) / YANG JIAN (author) / WANG YIKE (author)
2020-07-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2020
Preparation process of modified cassava starch-polycarboxylic acid composite water reducing agent
| European Patent Office | 2020
Modified cassava starch-polycarboxylic acid composite water reducing agent
| European Patent Office | 2020
| European Patent Office | 2020
| European Patent Office | 2020