Restauro R3

Restauro R3 is a single-component, ready-to-use, grey-coloured cementitious mortar, based on a mixture of special cements, selected aggregates, synthetic resins, fibres and specific additives. After mixing with water, the result is a mixture with excellent workability, excellent thixotropy, easy to apply vertically and on the ceiling in thickness up to 4 cm per coat without problems of dripping. A slight expansion both in the plastic phase and in the post-hardening phase makes it possible to compensate for hydraulic shrinkage, with a considerable increase in the final adhesion characteristics, while avoiding cracking. Its excellent water retention reduces the risk of “burning” in the case of application at low thickness (which must not be less than 10 mm) and, with appropriate attention, even in critical climatic conditions (summer temperatures and ventilation); in this case, however, it is necessary to take appropriate precautions (avoid direct exposure to the sun, mix with cold water, apply the product preferably during cooler hours and little sunshine, etc.). The presence of special flexible polymers gives the mortar excellent adhesion to the substrate. Specific additives make the hardened mortar impermeable to water and resistant to CO₂penetration. Restauro R3 is a product for the structural repair of concrete structures by means of hydraulic mortar of PCC type and class R3 according to EN 1504-3.

Instructions for use

Preparation for use
The application surfaces must be clean and and severely roughened. Remove cement residues and loose, crumbling, inconsistent parts until the sound, durable substrate is reached. Remove rust from the iron bars. If the section of the bars is weakened, supplement them with additional iron bars. Wash with a pressurized water jet. Apply water on the substrate until it is rejected. In the event of water seepage or water penetration, block these with quick-setting or very quick-setting mortars such as Umafix and Stop. For an effective adhesion on the substrate and/or corrosion protection of the reinforcement, apply Restauro Ferri (see the relative technical data sheet).

Instructions for application
Mix Restauro R3 with 14-16% of water (equal to 3.5-4.0 litres of water per 25 kg bag) and stir for a few minutes until the mixture is homogeneous and free of lumps. Apply the mortar by hand with a masonry trowel or American trowel or by spraying with a suitable plastering machine. In the summer season, mix Restauro R3 with cold water and apply it away from the sun or protect it adequately from the direct sunlight. In places particularly exposed to ventilation and sunlight, mix Restauro R3 with 1:4 diluted Neoplast Latex – water solution and protect the applied mixture. For better adhesion of the fillings, it is advisable to spread on the substrate an adhesion grout made of Restauro R3 mixed with Neoplast Latex diluted in water 1:2 working fresh on the fresh substrate (see Neoplast Latex technical data sheet). Restauro R3 can be applied using a piston or worm plastering machine and continuous mixing machines such as Turbosol, Putzmeister or PFT.

Cleaning
The tools used for laying can be cleaned with water before the mortar hardens; afterwards cleaning can be carried out only by mechanical removal.

Storage

Restauro R3 must be stored in a dry and sheltered place. In the original closed bags it is kept for at least 9 months. PROTECT FROM HUMIDITY.

Warnings

• Never mix with other binders such as cement, hydraulic lime, gypsum, etc.
• Do not add water when the mixture has already started setting.
• Stop using the mixed product when it has already started to set, so take care to prepare from time to time a quantity of mixture that can be applied within its workability time
• Do not use the product at high temperatures and with strong ventilation. Protect from direct sunlight. In the hot season, wait for the cooler hours to apply, mix with cold water and protect the surface from ventilation.
• To prevent surface cracks from forming in the plastic mortar due to the too rapid evaporation of the mixing water, especially in the hot season, and to ensure that the expansive action which cancels the effects of mortar shrinkage is carried out, the fillings and repairs carried out with Restauro R3 must be kept damp for at least 24 hours and protected from the wind and direct sunlight by spraying the surface with nebulised water or covering with polyethylene sheets.
• Do not apply Restauro R3 at temperatures below +5 °C or above +30 °C.