Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of composite water reducing agent for concrete
The invention discloses a preparation method of a composite water reducing agent for concrete. The composite water reducing agent comprises the following components: 30-36 parts of maleic anhydride glycerophosphate, 12-16 parts of cationic polyacrylamide, 10-15 parts of allyl polyoxyethylene ether, 12-18 parts of sodium alginate, 20-30 parts of water, 6-10 parts of ammonium persulfate, 5-9 parts of mercaptopropionic acid, 8-12 parts of polyacrylate, 8-12 parts of modified corn starch, 2-5 parts of acrylic acid and 2-4 parts of ascorbic acid. The preparation method comprises the following steps: adding maleic anhydride glycerophosphate and allyl polyoxyethylene ether into deionized water, stirring, adding ammonium persulfate and thiohydracrylic acid, heating to 70-80 DEG C, and stirring to react for 2-3 hours for later use; s2, after the reaction in the step S1 is completed, lowering the temperature to 60-65 DEG C, dropwise adding acrylic acid and ascorbic acid in the stirring process, continuing stirring reaction to be conducted for 1-1.5 h at the temperature after dropwise adding is completed, adding cationic polyacrylamide, sodium alginate and modified corn starch, performing stirring reaction for 40-70 min at the temperature, cooling and obtaining the water reducing agent is obtained.
本发明公开了一种用于混凝土的复合减水剂的制备方法，按重量份数计，包括以下成分：马来酸酐甘油磷酸酯30～36份、阳离子聚丙烯酰胺12～16份、烯丙基聚氧乙烯醚10～15份、海藻酸钠12～18份、水20～30份、过硫酸铵6～10份、巯基丙酸5～9份、聚丙烯酸酯8～12份、改性玉米淀粉8～12份、丙烯酸2～5份和抗环血酸2～4份。制备方法包括将马来酸酐甘油磷酸酯、烯丙基聚氧乙烯醚加入到去离子水当中，搅拌，加入过硫酸铵和巯基丙酸，将温度升至70～80℃搅拌反应2～3h，备用；待上述步骤S1中的反应完毕后，将温度将至60～65℃在搅拌过程中滴加丙烯酸和抗坏血酸，滴加完毕后在该温下继续搅拌反应1～1.5h，将阳离子聚丙烯酰胺、海藻酸钠和改性玉米淀粉加入，在该温下搅拌反应40～70min，冷却，得到所述减水剂。
Preparation method of composite water reducing agent for concrete
The invention discloses a preparation method of a composite water reducing agent for concrete. The composite water reducing agent comprises the following components: 30-36 parts of maleic anhydride glycerophosphate, 12-16 parts of cationic polyacrylamide, 10-15 parts of allyl polyoxyethylene ether, 12-18 parts of sodium alginate, 20-30 parts of water, 6-10 parts of ammonium persulfate, 5-9 parts of mercaptopropionic acid, 8-12 parts of polyacrylate, 8-12 parts of modified corn starch, 2-5 parts of acrylic acid and 2-4 parts of ascorbic acid. The preparation method comprises the following steps: adding maleic anhydride glycerophosphate and allyl polyoxyethylene ether into deionized water, stirring, adding ammonium persulfate and thiohydracrylic acid, heating to 70-80 DEG C, and stirring to react for 2-3 hours for later use; s2, after the reaction in the step S1 is completed, lowering the temperature to 60-65 DEG C, dropwise adding acrylic acid and ascorbic acid in the stirring process, continuing stirring reaction to be conducted for 1-1.5 h at the temperature after dropwise adding is completed, adding cationic polyacrylamide, sodium alginate and modified corn starch, performing stirring reaction for 40-70 min at the temperature, cooling and obtaining the water reducing agent is obtained.
本发明公开了一种用于混凝土的复合减水剂的制备方法，按重量份数计，包括以下成分：马来酸酐甘油磷酸酯30～36份、阳离子聚丙烯酰胺12～16份、烯丙基聚氧乙烯醚10～15份、海藻酸钠12～18份、水20～30份、过硫酸铵6～10份、巯基丙酸5～9份、聚丙烯酸酯8～12份、改性玉米淀粉8～12份、丙烯酸2～5份和抗环血酸2～4份。制备方法包括将马来酸酐甘油磷酸酯、烯丙基聚氧乙烯醚加入到去离子水当中，搅拌，加入过硫酸铵和巯基丙酸，将温度升至70～80℃搅拌反应2～3h，备用；待上述步骤S1中的反应完毕后，将温度将至60～65℃在搅拌过程中滴加丙烯酸和抗坏血酸，滴加完毕后在该温下继续搅拌反应1～1.5h，将阳离子聚丙烯酰胺、海藻酸钠和改性玉米淀粉加入，在该温下搅拌反应40～70min，冷却，得到所述减水剂。
Preparation method of composite water reducing agent for concrete
一种用于混凝土的复合减水剂的制备方法
YANG YAHONG (Autor:in)
31.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
C07F
Acyclische, carbocyclische oder heterocyclische Verbindungen, die andere Elemente als Kohlenstoff, Wasserstoff, Halogen, Sauerstoff, Stickstoff, Schwefel, Selen oder Tellur enthalten
,
ACYCLIC, CARBOCYCLIC, OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
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