METHOD OF MAKING ROUGH PAVING FROM CEMENT CONCRETE Russian patent published in 2013 - IPC E01C7/12 

FIELD: process engineering.

SUBSTANCE: proposed method comprises mixing coarse and fine filler with binder, making paving from prepared mortar and its concreting with application of rough layer on paving surface, making two-layer coat. Top layer represents wearing layer made from 5-20 mm-thick perforated concrete, perforations being shaped to reversed truncated cones or polyhedral pyramids, its area making 5-20% of total area of coating. Bottom layer is made from drain cement concrete by mixing mortar, stone crushed to 2-10 mm-size, a coarse filler, and fine filler, for example, quartz sand.

EFFECT: higher operating reliability.

1 cl, 4 dwg