METHOD FOR MAKING CONCRETE AND FERROCONCRETE TUBES WITH USE OF COMPACTING HEAD (VARIANTS) Russian patent published in 1999 - IPC

FIELD: building. SUBSTANCE: method comprises steps of feeding concrete mixture into lower part of cavity restricted by wall of form and turned to it surfaces of pumping members; moving compaction head from downwards to upwards only when annular layer of concrete mixture displaced at starting period of molding becomes higher than head itself in order to provide height of said layer no less than wall thickness of molded tube. EFFECT: enhanced stability and uniformity of compaction of concrete mixture. 11 cl, 10 dwg