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A platform for research: civil engineering, architecture and urbanism
Starch-based concrete admixture and preparation method thereof
The invention belongs to the technical field of concrete building materials, and particularly relates to a starch-based concrete admixture and a preparation method thereof. According to the starch-based concrete admixture prepared by the invention, the starch is oxidized in an acidic environment and an alkaline environment respectively to obtain the oxidized modified starch, a reagent obtained after the two solutions are mixed is neutral, and the pH value of the solution does not need to be adjusted by adding an acid-base solution additionally; solid powder formed by dehydration contains oxidized modified starch and a small amount of sodium chloride, sulfate and other impurities, the carboxyl carrying amount of the oxidized modified starch is about 6.2%, the oxidized modified starch can play a role of alkaline water, and a small amount of sodium chloride and sulfate impurities play an early strength role in concrete, accelerate cement hydration and have a slurry extraction function. The cement paste of the concrete is fuller, and the workability is better.
本发明属于混凝土建筑材料技术领域，具体涉及一种淀粉基混凝土外加剂及其制备方法。本发明制备的淀粉基混凝土外加剂，分别通过在酸性环境、碱性环境下，对淀粉进行氧化，得到氧化改性淀粉，两种溶液混合后的试剂为中性，无需另外加入酸碱溶液来调节溶液的pH值；脱水形成的固体粉末中，含有氧化改性淀粉以及少量的氯化钠、硫酸盐等杂质，其中氧化改性淀粉的羧基携带量在6.2％左右，能够发挥碱水作用，而少量的氯化钠、硫酸盐杂质，在混凝土中发挥早强作用，加快水泥水化，具有提浆功能，使混凝土的水泥浆更饱满，和易性更好。
Starch-based concrete admixture and preparation method thereof
The invention belongs to the technical field of concrete building materials, and particularly relates to a starch-based concrete admixture and a preparation method thereof. According to the starch-based concrete admixture prepared by the invention, the starch is oxidized in an acidic environment and an alkaline environment respectively to obtain the oxidized modified starch, a reagent obtained after the two solutions are mixed is neutral, and the pH value of the solution does not need to be adjusted by adding an acid-base solution additionally; solid powder formed by dehydration contains oxidized modified starch and a small amount of sodium chloride, sulfate and other impurities, the carboxyl carrying amount of the oxidized modified starch is about 6.2%, the oxidized modified starch can play a role of alkaline water, and a small amount of sodium chloride and sulfate impurities play an early strength role in concrete, accelerate cement hydration and have a slurry extraction function. The cement paste of the concrete is fuller, and the workability is better.
本发明属于混凝土建筑材料技术领域，具体涉及一种淀粉基混凝土外加剂及其制备方法。本发明制备的淀粉基混凝土外加剂，分别通过在酸性环境、碱性环境下，对淀粉进行氧化，得到氧化改性淀粉，两种溶液混合后的试剂为中性，无需另外加入酸碱溶液来调节溶液的pH值；脱水形成的固体粉末中，含有氧化改性淀粉以及少量的氯化钠、硫酸盐等杂质，其中氧化改性淀粉的羧基携带量在6.2％左右，能够发挥碱水作用，而少量的氯化钠、硫酸盐杂质，在混凝土中发挥早强作用，加快水泥水化，具有提浆功能，使混凝土的水泥浆更饱满，和易性更好。
Starch-based concrete admixture and preparation method thereof
一种淀粉基混凝土外加剂及其制备方法
CHEN LI (author) / GUI QIANG (author) / MA WEIWEI (author) / HOU ZHANCHAO (author) / WANG MENG (author) / PAN SHAOXUE (author) / ZHENG WEISHENG (author) / LIU XIAOFEI (author)
2024-03-22
Patent
Electronic Resource
Chinese
Concrete admixture, preparation method thereof and concrete added with concrete admixture
| European Patent Office | 2020