Waste clay brick powder is taken as the research object.On the basis of mechanical excitation(ball mill 35 min),through chemical excitation such as lime,sodium silicate and sodium sulfate,highly active brick powder cementitious materials were prepared.The mechanism of brick powder activity enhancement is studied by XRD,SEM and other technologies.Taguchi test showed that the best combination of activator parameters for brick powder cementitious materials was 5％lime,12％sodium silicate and 15％sodium sulfate.Microscopic experiments show that the activator can improve the overall strength and hydration rate of the test block without affecting the type of hydration products.XRD results show that the hydration degree of the test block with activator is higher than that of the pure cement test block,and the excitation effect is better.The results of SEM and EDS showed that the structure of the test block with activator was denser,and the hydration products were mainly C-(A)-S-H gel,which filled the pores.
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