Paving stone e.g. ashlar, has large concrete aggregates enclosed in face concrete, such that one color of aggregates and colors of cement pastes are viewable in surface after shot-peening, water jets, solidification, milling and abrasion

摘要

The stone has large concrete aggregates (3, 4, 5) of a color of different colored cement pastes (6, 7), which are mixed with small concrete aggregates such as sand, are enclosed in a face concrete, in such a manner that one of the colors of the large concrete aggregates as well as the two colors of the cement pastes are viewable in the surface after the shot-peening, water jets, solidification, milling, abrasion or after the mechanical surface treatment by hammer tools.