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A platform for research: civil engineering, architecture and urbanism
Retarder and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses a retarder and application thereof in preparation of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The retarder is prepared from the following components in parts by weight: 43 to 60 parts of sodium gluconate, 30 to 37 parts of sodium citrate, 22 to 29 parts of sodium tripolyphosphate, 13 to 19parts of sodium pyrophosphate, 3 to 8 parts of ammonium borate, 2 to 4 parts of ferrous sulfate and 1 to 3 parts of magnesium sulfate. The cassava starch is subjected to oxidation, acidification, etherification, grafting, neutralization and other reaction processes to prepare the starch-containing composite water reducing agent. By adopting the composite water reducing agent containing the retarder, the setting time of concrete can be adjusted, the performance of the concrete can be improved, and meanwhile, the effects of specifically improving the net slurry fluidity of the concrete, reducingthe construction energy consumption and the like can be achieved. Development and application of the cassava starch water reducing agent are beneficial to improvement of the water reducing agent processing technology, improvement of the water reducing agent product quality and reduction of environmental pollution.
本发明公开了一种缓凝剂及其在制备改性木薯淀粉‑聚羧酸复合减水剂中的应用，属于建筑材料领域。所述缓凝剂以重量份为单位，包括以下组分：葡萄糖酸钠43‑60份、柠檬酸钠30‑37份、三聚磷酸钠22‑29份、焦磷酸钠13‑19份、硼酸铵3‑8份、硫酸亚铁2‑4份、硫酸镁1‑3份。木薯淀粉通过氧化、酸化、醚化、接枝、中和等反应工序制成含淀粉复合减水剂。采用本发明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。木薯淀粉减水剂的开发应用有助于改进减水剂加工工艺、提高减水剂产品质量、降低环境污染。
Retarder and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses a retarder and application thereof in preparation of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The retarder is prepared from the following components in parts by weight: 43 to 60 parts of sodium gluconate, 30 to 37 parts of sodium citrate, 22 to 29 parts of sodium tripolyphosphate, 13 to 19parts of sodium pyrophosphate, 3 to 8 parts of ammonium borate, 2 to 4 parts of ferrous sulfate and 1 to 3 parts of magnesium sulfate. The cassava starch is subjected to oxidation, acidification, etherification, grafting, neutralization and other reaction processes to prepare the starch-containing composite water reducing agent. By adopting the composite water reducing agent containing the retarder, the setting time of concrete can be adjusted, the performance of the concrete can be improved, and meanwhile, the effects of specifically improving the net slurry fluidity of the concrete, reducingthe construction energy consumption and the like can be achieved. Development and application of the cassava starch water reducing agent are beneficial to improvement of the water reducing agent processing technology, improvement of the water reducing agent product quality and reduction of environmental pollution.
本发明公开了一种缓凝剂及其在制备改性木薯淀粉‑聚羧酸复合减水剂中的应用，属于建筑材料领域。所述缓凝剂以重量份为单位，包括以下组分：葡萄糖酸钠43‑60份、柠檬酸钠30‑37份、三聚磷酸钠22‑29份、焦磷酸钠13‑19份、硼酸铵3‑8份、硫酸亚铁2‑4份、硫酸镁1‑3份。木薯淀粉通过氧化、酸化、醚化、接枝、中和等反应工序制成含淀粉复合减水剂。采用本发明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。木薯淀粉减水剂的开发应用有助于改进减水剂加工工艺、提高减水剂产品质量、降低环境污染。
Retarder and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
缓凝剂及其在制备改性木薯淀粉-聚羧酸复合减水剂中的应用
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
Modified cassava starch-polycarboxylic acid composite water reducing agent
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Preparation process of modified cassava starch-polycarboxylic acid composite water reducing agent
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Concrete containing modified cassava starch-polycarboxylic acid composite water reducing agent
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| European Patent Office | 2020