The cocciopesto is an hydraulic aggregate that are in addition to or in replacement of the sand changes the character of the mortar air lime leading processes and reactions of the hydraulic type, with the formation of silicates and aluminate hydrates, calcium.
It is obtained from the crushing of bricks, and the next screening in specific grain sizes. From this process derives its name because in ancient times it was used to crush tiles, dishes in cocciopesto, amphorae, bricks. About the composition of the mortar air lime Vitruvius in his Architectural Treatise suggests: “when the lime is settled, then stir in the matter, so that, if the arena was a fossil, you confuse the three parts of this, and a lime. If it be a river or a marina with two of the sand and so you will be the right proportion of the mixture. And if in the river or marina, you will add a third part of the brick pesto and collated, this will form the composition of the matter still better to use”. (Vitruvius Pollio's Architecture, book II, chap. v – I sec. A. C.).
Common uses of “Cocciopesto Guglielmino”
The “Cocciopesto Guglielmino " for its special characteristics, is commonly used as the aggregate:
• for the composition of dehumidifying mortars;
• for the composition of the plaster and the background finish;
• for the composition of stuccowork;
• for the mortar of walls and floors in terracotta tiles;
• For floor such as the terraces and domes of monumental buildings;
• in the screeds of background for floors, wrought earthenware;
• in the case of mixtures of finish to the floors and wrought of cocciopesto;
• tracks in dirt in the furnishings in gardens and in public parks;