APPLICATION PROCEDURES
- Removal of the plaster and deep cleaning of the joints, with removal of the incoherent bedding mortar. Surface cleaning using a suitable method (sandblasting, pressure washing, etc.). At the end of cleaning, the load-bearing elements of the masonry must be clearly visible, free of dust, patinas, encrustations and weak or inconsistent parts on the surface, with well-deepened joints, in order to create “support steps” for the reinforced plaster and thus favoring a solid meshing and perfect collaboration with the load-bearing elements of the masonry.
- Drill the substrate according to a grid dimensioned during the design phase (usually from 2 to 4 holes/m²). Insertion in the holes of helical bars in stainless steel HELIX STEEL AISI 304, with the diameter of the bars chosen according to the structural needs. Fixing the bars with SYNTECH FIX EP chemical anchor or, alternatively, with ANCHORSANA FIX hydraulic binder-based stucco.
- Priming the substrate with BOND HG adhesive latex with pozzolanic reaction, applied with a roller, brush or spray, immediately before applying the mortar. Consumption about 200 gr/m².
- Manual or mechanical application (spray), on the edge of the masonry, of UNISAN composite mortar, fiber-reinforced with double type of READYMESH fibers (glass and polypropylene), dehumidifying, with very high breathability, class R (restoration according to UNI EN 998/1), to based on hydraulic binders with a low content of soluble salts, with mechanical resistance in class R2 (according to UNI EN 1504/3), reaction to fire class A1 (EN 13501-1), permeability to water vapor 11 μ (UNI EN 1015-19), compressive strength after 28 days > 20 MPa (UNI EN 12190), flexural strength after 28 days > 4 MPa (UNI EN 12190) modulus of elasticity 11 GPa (EN 13412), maximum granulometry of the aggregate 1,5 mm. Mix the product with water using a suitable mechanical mixer for at least two minutes and, in any case, until a homogeneous and lump-free mixture is obtained. Carry out a first layer of low thickness rough coat, making sure that the mortar penetrates inside the skinned joints and filling them (help the penetration of the mortar with a brushing operation using a hard bristle brush). Proceed with the first repair layer of the section up to approximately half of the expected total thickness. Position the ARMAGLASS STRUCTURA 330 fiberglass mesh, taking care to partially drown the mesh on the first layer of still fresh mortar. Wait for the first layer to harden, then apply the second layer of UNISAN mortar, until the required reinforcement section is completed (on average from 2 to 4 cm in total). Consumption of UNISAN mortar approx. 15 kg/m² per cm of thickness
Application stratigraphy
- Cleaning of the joints and hole for housing the helical bar
- Priming the substrate with BOND HG
- UNISAN mortar (1st layer)
- ARMAGLASS STRUCTURA 330 embedded in the 1st layer of UNISAN
- Insertion of HELIX STEEL AISI 304 helical bar and fixing with SYNTECH FIX EP chemical anchor (bend the helical bar to L in order to support the ARMAGLASS STRUCTURA 330 mesh)
- UNISAN (2nd layer)
SYSTEM COMPONENTS
Bond HG
Multifunctional bonding and adhesive latex in a light pink, viscous solution, based on a special elastomer in aqueous dispersion, coalescing agents, deaerating agents and fillers with a superpozzolanic reaction. Bond HG is a multifunctional, reactive, flexibilising and waterproofing compound for preparing bonding primers, bonding slurries and waterproofing coatings, as well as for improving the adhesion, bond strength, deformability, watertightness and performance of mortars, renders, fine concretes and concrete.
Bond HG
Multifunctional bonding and adhesive latex in a light pink, viscous solution, based on a special elastomer in aqueous dispersion, coalescing agents, deaerating agents and fillers with a superpozzolanic reaction. Bond HG is a multifunctional, reactive, flexibilising and waterproofing compound for preparing bonding primers, bonding slurries and waterproofing coatings, as well as for improving the adhesion, bond strength, deformability, watertightness and performance of mortars, renders, fine concretes and concrete.
Unisan
Composite, fiber-reinforced, consolidating mortar with low liquid water absorption, used for the structural rehabilitation of deteriorated historic or monumental masonry. It contains no substances potentially harmful to masonry and is composed of hydraulic binders free from soluble salts, pozzolanic silica, selected siliceous-calcareous aggregates, specific shrinkage-reducing agents, and alkali-resistant READYMESH fibers, which provide high flexural tensile strength and increase the mortar’s fracture energy. Ideal for the structural rehabilitation of historic brick, stone or mixed masonry, used in combination with ARMAGLASS STRUCTURA glass-fiber meshes.
Unisan
Composite, fiber-reinforced, consolidating mortar with low liquid water absorption, used for the structural rehabilitation of deteriorated historic or monumental masonry. It contains no substances potentially harmful to masonry and is composed of hydraulic binders free from soluble salts, pozzolanic silica, selected siliceous-calcareous aggregates, specific shrinkage-reducing agents, and alkali-resistant READYMESH fibers, which provide high flexural tensile strength and increase the mortar’s fracture energy. Ideal for the structural rehabilitation of historic brick, stone or mixed masonry, used in combination with ARMAGLASS STRUCTURA glass-fiber meshes.
Armaglass Structura 330
330 g/m² structural reinforcement mesh with a 50 x 50 mm square mesh, made of alkali-resistant fiberglass containing > 16% zirconium dioxide, leno-woven and coated with a thermosetting polymer; easy and quick to apply, handle and cut. It combines low weight and reduced thickness with excellent mechanical properties in both the warp and weft directions. Resistant to atmospheric agents and aggressive environments, it provides durability to the composite systems in which it is used. Suitable for any substrate and fully compatible with both cement-based and lime-based mortars.
Armaglass Structura 330
330 g/m² structural reinforcement mesh with a 50 x 50 mm square mesh, made of alkali-resistant fiberglass containing > 16% zirconium dioxide, leno-woven and coated with a thermosetting polymer; easy and quick to apply, handle and cut. It combines low weight and reduced thickness with excellent mechanical properties in both the warp and weft directions. Resistant to atmospheric agents and aggressive environments, it provides durability to the composite systems in which it is used. Suitable for any substrate and fully compatible with both cement-based and lime-based mortars.
Syntech E-Plus
Syntech E-Plus is a two-component adhesive based on epoxy resins, offering exceptionally high adhesion and resistance to stresses resulting from heavy loads, together with rapid development of mechanical strength. It is suitable for the structural anchoring and fastening of bars and metal elements to concrete, stone, brickwork, timber and construction materials in general. Syntech E-Plus can also be used as a bonding agent between dissimilar materials. To be extruded using a dedicated 470 cc gun (see the technical data sheet: GUNS Extruders for Cartridges). Syntech E-Plus is ETAG-certified for C2 seismic loads.
Syntech E-Plus
Syntech E-Plus is a two-component adhesive based on epoxy resins, offering exceptionally high adhesion and resistance to stresses resulting from heavy loads, together with rapid development of mechanical strength. It is suitable for the structural anchoring and fastening of bars and metal elements to concrete, stone, brickwork, timber and construction materials in general. Syntech E-Plus can also be used as a bonding agent between dissimilar materials. To be extruded using a dedicated 470 cc gun (see the technical data sheet: GUNS Extruders for Cartridges). Syntech E-Plus is ETAG-certified for C2 seismic loads.
Helix Steel AISI 304
Cold-drawn AISI 304 stainless steel helical bar with high mechanical performance, for reinforced repointing of joints and for connections, including through-connections, in masonry, reinforced concrete, arches and vaults. Suitable for strengthening structures in seismic areas; advantageous in combination with hydraulic binders (cement and hydraulic lime) and resin-based binders, it particularly facilitates the achievement of the required physical and mechanical performance when combined with Unisan mortar, the REPAR and GROUT product ranges, and the SYNTECH range of structural resins. The optional Connector Steel Aisi 304 accessory, supplied separately on request, enables the connection between a through helical bar and a helical bar positioned deep within the raked-out joint.
Helix Steel AISI 304
Cold-drawn AISI 304 stainless steel helical bar with high mechanical performance, for reinforced repointing of joints and for connections, including through-connections, in masonry, reinforced concrete, arches and vaults. Suitable for strengthening structures in seismic areas; advantageous in combination with hydraulic binders (cement and hydraulic lime) and resin-based binders, it particularly facilitates the achievement of the required physical and mechanical performance when combined with Unisan mortar, the REPAR and GROUT product ranges, and the SYNTECH range of structural resins. The optional Connector Steel Aisi 304 accessory, supplied separately on request, enables the connection between a through helical bar and a helical bar positioned deep within the raked-out joint.