In view of the low activity of recycled powder and its inefficient utilization,this paper ex-plores the effect of combined physical and chemical activation on the activity of recycled powder based on the study of physical grinding and chemical activation.The results showed that the activity index of combined physical and chemical activation could be increased by 14.7％,which was significantly more effective than the single activation method.After mechanical grinding,the structure surface defects of the recycled powder increased,which promoted the dissolution of the active ingredients,further in-creased the efficiency of the reaction between the chemical activator and the recycled powder,and pro-moted the formation of more gel phases such as C-S-H and C-A-S-H in the sample that could improve the strength of the sample.
维普
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