Sistem de consolidare structurala cu tesatura unidirectionala din fibre de sticla si rasini epoxidice MAPEI MAPEWRAP G UNI-AX SYSTEM

Limba: Italiana

22 afisari

Tip documentatie: Fisa tehnica

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MapeWrap G UNI-AX System STRUCTURAL STRENGTHENING SYSTEM CONSISTING OF HIGH-STRENGTH HIGH-MODULUS UNIDIRECTIONAL GLASS FIBRE FABRIC AND EPOXY RESINS TO IMPREGNATE AND BOND THE FABRIC (FRP) COVERED BY CERTIFICATE OF TECHNICAL ASSESSMENT (CVT) N° 206/2019 CLASS 60G PRODUCTS USED IN THE SYSTEM: MapeWrap G UNI-AX 900 MapeWrap 31 MapeWrap 11 - MapeWrap 12 MapeWrap Primer 1 WHERE TO USE This system is recommended for repairing and increasing the structural capacity of under-dimensioned or damaged elements and structures in reinforced concrete, masonry, steel and wood, to improve the flexural strength, shear strength, compressive confinement capacity and bending/ compressive capacity of concrete and masonry elements and structures, to upgrade or improve the seismic capacity of structures in high-risk areas, to improve the characteristics of beampillar hinge points and to increase the ductility of confined elements. Some application examples • Repairs and static upgrading of damaged or de

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teriorated structures where the shear strength of sections requires integrating. • Confining compressed and pre-stressed elements (pillars, bridge piles, chimneys, storage tanks, etc.) to improve their load-bearing capacity or ductility. • Seismic upgrading and restoration of domed structures without increasing their seismic mass and without the risk of liquids percolating towards their inner surfaces. • Strengthening load-bearing elements in buildings whose structural system has been modified due to new architectural requirements or change in use. The system is covered by Certificate of Technical Assessment (CVT) N° 206/2019 issued by the 2° Div. of the STC (Central Technical Service) of the CSLP (Ministry of Public Works). TECHNICAL CHARACTERISTICS The MAPEWRAP G UNI-AX SYSTEM is the combined application of MAPEWRAP G UNI-AX 900 glass fibre fabric, a system of epoxy binders which includes MAPEWRAP 31 epoxy resin to impregnate and bond the fabric, MAPEWRAP 11 or MAPEWRAP 1

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2 epoxy putty to level off surfaces and bond the fabric and MAPEWRAP PRIMER 1 epoxy primer recommended to consolidate the substrate. The use of epoxy putty MAPEWRAP 11 or MAPEWRAP 12 is recommended in particular to level surfaces with roughness equal to or greater than ± 2 mm. The application of epoxy putty is furthermore suggested to increase the adhesion and to facilitate the application of fabric with high weight (equal to or greater than 600 g/m²). MAPEWRAP G UNI-AX 900 is a unidirectional glass fibre fabric. MAPEWRAP 31 is a medium-viscosity epoxy adhesive used to impregnate MAPEWRAP fabrics and is made from: – component A (resin); – component B (catalyser). MAPEWRAP 11 / MAPEWRAP 12 are epoxy putties with a thixotropic consistency used to level off surfaces and to form structural bonds and are made from: – component A (resin); – component B (catalyser). MAPEWRAP PRIMER 1 is an epoxy primer used to prepare the surface of concrete, reinforced concrete and masonry elements

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and structures before bonding MAPEWRAP fabrics and is made from: – component A; – component B. MAPEWRAP 31, MAPEWRAP 11 and MAPEWRAP 12 respond to the principles defined in EN 1504-9 (“Products and systems for protecting and repairing concrete structures: definitions, requirements, quality control and conformity assessment. General principles for the use of products and systems”), and the minimum requirements for EN 1504-4 (“Structural bonding”). ADVANTAGES Unlike work carried out using conventional techniques, thanks to its low weight, the MAPEWRAP G UNI-AX SYSTEM may be installed by a smaller team of workers. The system may be applied extremely quickly and often without interrupting the use of the structure. Compared with the cladding technique with metal plates (beton plaqué), the MAPEWRAP G UNI-AX SYSTEM may be modelled to suit any shape of element or structure requiring repair, it does not require temporary supports during application and there is no risk of corrosi

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on to the strengthening system. RECOMMENDATIONS All workers must wear protective gloves and goggles and anti-solvent safety masks. APPLICATION PROCEDURE Preparation of the substrate The surface on which MAPEWRAP G UNI-AX 900 fabric is to be applied must be perfectly clean, dry and strong. Masonry structures: before applying the fabric, remove all loose or crumbling areas or areas at risk of becoming detached and level off the surfaces with a layer of PLANITOP HDM MAXI. Wooden structures: repair wooden elements and structures, where required, by applying adhesives from the MAPEWOOD range. Concrete structures in good condition: sandblast the surface to remove all traces of stripping compound, paint and cement laitance. Damaged concrete structures: remove all damaged areas with a hammer, a MapeWrap G UNI-AX System jack-hammer or by hydro-scarifying. Remove all traces of rust from the steel reinforcement and protect the reinforcement by applying MAPEFER two-component anticorrosion cement

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itious mortar or MAPEFER 1K one-component anticorrosion cementitious mortar. Repair the surface of concrete with products from the MAPEGROUT range. Wait at least three weeks before applying the MAPEWRAP G UNI-AX 900 SYSTEM. If structural strengthening work on concrete structures needs to be carried out immediately, use ADESILEX PG1 or ADESILEX PG2 to carry out repairs. Seal any cracks in the structure by injecting them with EPOJET or EPOJET LV (suitable only for dry or slightly damp cracks) or with FOAMJET T or FOAMJET F (suitable for damp cracks or if water is seeping in). Refer to the relative Technical Data Sheet for details on how to apply the aforementioned products. Round off all sharp edges and corners on concrete or masonry elements and structures which are to be strengthened with the MAPEWRAP G UNI-AX 900 SYSTEM (such as beams and pillars) with a jack-hammer or other suitable tools. It is recommended to round them off to a bending radius of at least 2 cm (in compliance with CN