Abstract: At present, the muck from subway exits pile , low utilization and low added value , therefore, the influence of different contents of muck as admixtures on workability , mechanical properties and impermeability of C30 concrete are studied in this paper .The experimental results indicate that the slump decrease gradually with the increasing of muck contents .The compressive strengths of concrete is smaller than the reference group with the increasing of muck contents .The compressive strength of concrete at 28 days is similar with the reference group when the content of muck is 10%of cement contents .A moderate amount muck contents can improve the impermeability of C 30 concrete , when admixture of muck content is 15%, the concrete impermeability is the best .

Key words: muck;concrete;slump;compressive strength;impermeability