DESIGN, QUALITY AND PERFECTION
THE CHARACTERISTICS OF TERRAZZO
Definition: Terrazzo is defined as a vibro-compressed cement mortar tile formed by two faces, the exposed layer and the base layer.
Use: Terrazzo is used for paving and cladding indoor and outdoor areas.
Physical characteristics: This material is characterised by four basic elements.
Measurements: The most common formats are square and rectangular measuring 40×40 cm, 50×50 cm and 60×40 cm. We also make tiles in different shapes, depending on each project (triangular, like the Rhodes modes; irregular, like the Marea model…). The company is known for being helpful and taking an active part in many building projects, adopting each variable to the ideas of the planner.
Thickness: The tile thickness is determined by the pedestrian or vehicle traffic to be supported by the paving, and the intensity of that traffic. The composition of the materials and laying format are other variable to be considered.
Mosaics Planas manufactures tiles with thicknesses measuring from 3.2 to 7cm (depending on the format). For reference purposes, the most popular thicknesses are:
• For terrazzo tiles for indoor use measuring 40×40 cm, the recommended thickness is 3.4cm.
• For terrazzo tiles for indoor use measuring 60×40 cm with heavy pedestrian traffic, the recommended thickness is 4.5cm.
• For terrazzo tiles for outdoor use measuring 60×40 cm with light pedestrian and vehicle traffic, the recommended thickness is 5 cm.
• For terrazzo tiles for outdoor use measuring 60×40 cm with heavy vehicle traffic, the recommended thickness is 7cm.
Composition: The exposed face of the terrazzo tiles made by Mosaics Planas is formed mainly by BL II 42.5 R white cement, a marble powder with a specific grain, inorganic colorants (which are not altered by sunlight and water), dry components which are selected in accordance with the series chosen and additives (fireproof elements…). Our technical expertise in selecting the foregoing materials, compensated granulometry (different, depending on the models and uses) and the regular, precise, cutting-edge manufacturing system gives the paving tiles made by Mosaics Planas, s.a. an extremely important differentiation factor.
The product series shown in the catalogue are different from each other, due to their measurements or the types of dry components used to make them. In this way, marble or limestone components are used for normal pedestrian traffic (some models in the 300, 400, 700 and 900 series) and different components for heavy pedestrian traffic (other models from the 300, 400, 700 and 900 series). Enriching them with quartz helps to obtain high resistance to wear and tear in more rigorous uses, both indoors and outdoors (the 9000, 5000, Vibrosil or shot peening series) and granite components are added in a percentage of between 20% and 30%. Depending on the model, paving for industrial use is obtained (1000 series) and for ground or shot peening exteriors (2000, 4000 and 5000 series).
The base layer or face, which supports the exposed face, is formed by grey cement mortar and different types of sand (depending on the use or series). This face has a wrinkled texture to permit adherence with the key mortar.
Surface finish: Other basic and characteristic factors of paving or coatings are the surface finishes given to obtain the technical and visual characteristics required in the project. Basically, these include:
• Ground surfaces for finishing on the site (see specifications given later in this document).
• Factory-finished surfaces. With grain 220 for certain indoor uses (where they cannot be ground in situ) and for outdoor paving (they shine but are not slippery); in the latter case, the tiles usually have grooves of different types and shapes with aesthetic functions and for evacuating water (USRV 60-65 slipping resistance).
• “Polyshine” finish: a glossy finish obtained without wax or chemicals, used mainly for interior coatings.
• Mould surface texture: this name is used because the pressing mould has a determined texture and shape that give the tile its finish (e.g., the Vibrosil series). This process allows us to assimilate the natural or specific textures of other materials (USRV 75-85).
• Shot peening: this process is based on “blasting” the already hardened tile with metal shot, at a very high pressure and intensity, to give it a very characteristic slip-resistant texture (USRV 80).
• An “acid wash” finish in which the special stripping of the cement at the time of hardening drags the dry components to the surface, giving it a different texture (USRV).
• Surface treatments, to improve the fireproofing characteristics, texture and shine of some materials. Mosaicos Planas, s.a. applies different treatments to achieve great improvements in the indicated parameters.