Surface grinding treatment manner null of super early age cement quality floor

摘要

PURPOSE: To smoothen a finished surface of a cement floor base by grinding the skin layer the cement floor bed at a very young curing age after placing at which the cement floor exhibits strength which allows a worker to work on the bed, and by subjecting the same to primer work and drying. ;CONSTITUTION: A polishing paper sheet is applied or set on a rotary head of a rotary polisher, and is pressed against grinding particles laid on a floor bed, and is moved back and forth, and left and right, and is rotated. In this case, Grinding particles previously laid on the surface of the bed, are caught by the polishing paper sheet under the action of frictional contact with the abrasive grains, and accordingly, the particles are rolled on the base surface so as to remove a fragile latiance layer. In this case, even if the cement bed is soft due to a very young curing period, and accordingly, the abrasion force of the grinding particles only affects a shallow skin layer in the surface of the bed member. Further, the polishing paper sheet on rotation is lifted from the surface of the bed member by means of the grinding particles, and the polishing is carried out by rolling of the grinding particles. Thereby, it is possible to prevent ground chips from being pressed against the surface of the bed member, that is, the chips are floated up from the surface of the bed member, thereby it is possible to flatten and smooth the surface of the bed member, suitably for the next floor finishing process.;COPYRIGHT: (C)1996,JPO