CONSOLIDATING MASONRY

Masonry structures made of stone, bricks or mixed materials often get damaged by seismic events or by a natural degradation of their characteristics. Structural consolidation in these cases needs to be minimally invasive, as well as compatible and compliant with the historic and architectural profile of the concerned buildings.
Fibre Net developed different methods to obtain structural consolidation with the use of Fibre Net systems.

The systems vary depending on the type of consolidation required:

FRCM (Fiber Reinforced Cementitious Matrix): “reinforced render” method, where GFRP meshes, connections and accessories are combined with lime-based mortars to obtain collaborating reinforced renders capable of improving shear, flexural and compressive strength of masonry structures.

RETICOLA: “reinforced repointing” method, where stainless steel cords and connections are used to consolidate “exposed stone” masonry. The system helps reinforce masonry diffusely and successfully, while preserving the original aesthetics.

FRP: fibre-reinforced sheeting method, with GFRP and CFRP weaves, sheets and bars, particularly adapted to consolidate beams, pillars and columns and any other spots where masonry requires local reinforcement (hooping).

Fibre Net systems help obtain efficient, non-invasive and reversible consolidation. In addition to improving mechanical strength, ductility and stiffness of masonry structures, they ensure limited thickness of consolidation and reduce overall loads. Because the materials used are corrosion-proof and compatible with all types of mortars (lime, concrete, pozzolan, etc.), durability and efficiency are guaranteed over time.

 

FRCM

REINFORCED RENDER METHOD FOR RESTAURATION WORKS

Masonry buildings are often constructed with materials featuring poor mechanical strength. They include multiple structures that, especially if subject to seismic action, are prone to great in-plane (shear), out-of-plane (bending) and vertical (compression) strains, which may not always be tolerated by masonry.

Sheeting masonry with reinforced render makes a very efficient consolidation, as it guarantees adequate improvement of the mechanical characteristics of the wall frame. FIBREBUILD-FRCM system consists in using low-module render mortars, preferably lime-based, reinforced with preformed GFRP meshes and connectors on both wall faces. The added thickness is small (about 3 cm). This type of consolidation helps improve the structure diffusely and homogeneously, by adding mechanical strength, ductility, durability and low stiffness.

• LIGHTWEIGHT BUT HIGHLY RESISTANT
• CORROSION-PROOF AND COMPATIBLE WITH DIFFERENT TYPES OF MORTARS (LIME, CONCRETE, POZZOLAN BASED, ETC.)
• NON-MAGNETIC (NO “FARADAY CAGES”), SUITABLE FOR ECO-SUSTAINABLE WORKS
• REDUCED WEIGHT AND THICKNESS

• EFFICIENT AND DURABLE CONSOLIDATION
• DIFFUSED AND HOMOGENEOUS MECHANICAL IMPROVEMENT
• ENHANCED TRANSPIRATION QUALITY OF MASONRY
• SIMPLE AND RAPID INSTALLATION
• REDUCED HANDLING, INSTALLATION DURATION AND COST
• REDUCED TOTAL INTERVENTION COST
• SAFE WORKING ENVIRONMENT

 

RETICOLA

REINFORCED JOINT REPOINTING METHOD

A relevant part of Europe’s architectural heritage is rich in exposed stone or brick. Because frames are often poorly connected to each other and mortars are low quality, the need to preserve their exposed look can make it difficult to choose the best method of consolidation and, more generally, mechanical improvement.

The method of reinforced repointing of joints makes a viable solution to enhance the mechanical strength of exposed stone or brick masonry. The system allows consolidating the structure efficiently while not corrupting cosmetic quality. Based on Reticolatus*, FIBREBUILD-Reticola consists in repointing joints with stainless steel cords and connections, and lime-based mortar.
In particular, the following solutions are available:
FIBREBUILD RETICOLA: Reinforced repointing on one face
FIBREBUILD RETICOLAPLUS: Reinforced repointing on one face + reinforced render on the opposite face
FIBREBUILD RETICOLATWIN: Reinforced repointing on both faces

*Reticolatus is a method developed by UNILAB srl (former spinoff company of the University of Perugia)

• GREAT MECHANICAL PROPERTIES
• CORROSION-PROOF AND COMPATIBLE WITH LIME BASED MORTARS
• REVERSIBLE AND NON-INVASIVE CONSOLIDATION
• NON-MAGNETIC (NO “FARADAY CAGES”), SUITABLE FOR ECO-SUSTAINABLE WORKS

• “EXPOSED STONE” IS PRESERVED
• EFFICIENT AND DURABLE CONSOLIDATION
• DIFFUSED AND HOMOGENEOUS MECHANICAL IMPROVEMENT
• ENHANCED TRANSPIRATION QUALITY OF MASONRY
• SIMPLE AND RAPID INSTALLATION
• REDUCED TOTAL INTERVENTION COST

 

FRP

FIBRE-REINFORCED SHEETING

Historic stone or brick masonry often features low in-plane strength. Another problem lies in walls accommodating doors and windows, where inadequate wall-to-floor junction may cause structural weakness. Furthermore, any columns and pillars built with traditional materials are heavily prone to degradation and mechanical weakness.

FIBREBUILD-FRP, consisting in glass fibre or carbon fibre fabrics glued onto the structure with thermosetting polymer resins, improves shear resistance of masonry and compressive resistance of beams and pillars, as well as reinforcing individual spots and hooping the most sensitive areas, e.g. inter-floor and top curbs.
Consolidation is made in individual spots, by carefully choosing the amount and arrangement of fibres with a view to maximizing the mechanical properties of the reinforcement, depending on the design needs.
Because the fibres are available in unidirectional, bidirectional or multi-axial fabrics and are impregnated on site, they can be easily adapted to irregularly shaped architectural elements.

• GREAT MECHANICAL PROPERTIES
• CORROSION-PROOF AND COMPATIBLE WITH LIME AND CONCRETE BASED MORTARS
• ULTRA THIN

• EFFICIENT AND DURABLE CONSOLIDATION
• MECHANICAL IMPROVEMENT WITH TARGETED CONSOLIDATION OF INDIVIDUAL SPOTS
• REINFORCEMENT CAN BE SIZED TO SPECIFIC DESIGN
• REINFORCEMENT CAN BE ADAPTED TO IRREGULAR SHAPES
• NON-INVASIVE CONSOLIDATION