The investigation of reusing metamorphic waste powder for partly replacing Portland cement was carried out.The crystal and the amorphous behaviour of waste slate,the compressive strength,capillary water absorption and drying shrinkage were studied.The results show that with the replacement ratio of lower than 20%(by mass),slate powder has positive effect on the mechanical properties.The compressive strength of samples with waste slate powder increases by about 21% after 28 d.The slate powder shows both pozz...