利用栲胶部分取代苯酚制改性氨基磺酸系减水剂,研究了其改性工艺,结果表明较佳改性的改性工艺条件为:栲胶占栲胶与苯酚总质量的 25 %～37.5 %,反应时间 3 h、温度 90 ℃、pH值 9.0～11.0.改性产物的分散性能较未改性产物略有下降,但 2 h 流动度损失增大.当掺入量为 0.5 %,水灰比为0.28 :1时,掺改性产物和掺未改性产物的净浆流动度分别为240和 252 mm.
摘要(英文)：
In this paper the modifying technology.of vegetable tannin in place of phenol partially to produce aminosulfonic acidbased superplasticizer was studied. The result indicates that the better modified technological conditions are as follow：mass percent of vegetable tannin to total vegetable tannin and phenol is between 25 % - 37.5 %, reaction time is about 3 h, temperature is about 90 ℃, and pH is between 9.0 - 11.0. The modified product has a little worse dispersing capability than that of unmodified product, but its slump loss is a little big...
