Gum arabic, an inexpensive dispersant widely used in the food industry, has great potential for application in building materials. In order to find out the dispersion effect of gum arabic and the factors influencing t...Gum arabic, an inexpensive dispersant widely used in the food industry, has great potential for application in building materials. In order to find out the dispersion effect of gum arabic and the factors influencing the holding capacity of gum arabic in cement during hydration, rheological properties of cement paste with added gum arabic were assessed in this paper. The results show that 0.10wt%-0.60wt% of gum arabic positively affects dispersion, lower dosages have negligible effect. High speed mixing is required to maintain the dispersion stability of gum arabic in cement paste. The optimum dosage of gum arabic to achieve best disperse-holding capacity of cement paste was 0.3wt%, and the minimum water-cement ratio needed to obtain a dispersion effect was 0.28.展开更多
文摘Gum arabic, an inexpensive dispersant widely used in the food industry, has great potential for application in building materials. In order to find out the dispersion effect of gum arabic and the factors influencing the holding capacity of gum arabic in cement during hydration, rheological properties of cement paste with added gum arabic were assessed in this paper. The results show that 0.10wt%-0.60wt% of gum arabic positively affects dispersion, lower dosages have negligible effect. High speed mixing is required to maintain the dispersion stability of gum arabic in cement paste. The optimum dosage of gum arabic to achieve best disperse-holding capacity of cement paste was 0.3wt%, and the minimum water-cement ratio needed to obtain a dispersion effect was 0.28.
