The effect of different molecular weight dextrins prepared by enzymatic method on cement hydration
Study on the process condition of producing corn dextrin by enzymatic method,and molecular weight distribution was investigated by GPC.And the effects of different molecular weight dextrins on cement hydration were compared.Results indicated that when other conditions were fixed,molecular weight of corn dextrin was changed by α-enzyme dosage from 14 063 to 70 948,by time from 12 744 to 20 526,by temperature from 14 063 to 86 179,by starch concentration from 12 635 to 111210.Un-der certain conditions,a dextrin with an Mw of around 48 762 was prepared,It can reduce the peak hydration heat by about 30％without almost prolonging the retarding time.
corn dextrinGPChigh temperature resistant a-amylasemolecular weight of dextrinscement hydration
万方数据
维普
