Small or large portions of existing floors in historic buildings have often been refurbished with modern methods. During the 20th century, for instance, modern brick and concrete floors were used to replace badly damaged floors made of wood or other traditional materials not suitable to bear new load-bearing conditions or heavy seismic action.
A typical degradation, also called “delamination”, may happen when the intrados masonry elements delaminate and fall off, especially under seismic action.
To help secure degraded floors, Fibre Net developed the FRCM system, which consists in adding a GFRP mesh conveniently anchored to the intrados joists and finally covering it with plaster.
Because the materials are lightweight and practical, the system offers the advantage of being easily and rapidly installed and of guaranteeing mechanical efficiency and durability also in humid or chemically aggressive environments.
REINFORCED RENDER METHOD FOR RESTORATION WORKS
Degradation (delamination) may happen when the intrados elements of hollow blocks in concrete and masonry floors delaminate and fall off. The problem is normally found in a large number of buildings erected from the early 20th century through to the 1950s and 1960s, and poses a risk for people’s safety. This type of degradation may arise from a number of causes: differentential strains transversal to the floor frame; thermal expansion of masonry elements; manufacturing defects of the masonry elements; insufficient filling with cast concrete in the area underneath the joists.
Securing floors affected by this type of degradation consists in adding to the floor intrados a preformed GFRP mesh conveniently anchored to the joists. The system helps prevent any masonry elements from falling off. Moreover, the mechanical performance of a damaged floor can be enhanced with FIBREBUILD-FRCM full-package system, where GFRP meshes are installed on the intrados, anchored to the joists and finally covered with plaster.
• LIGHTWEIGHT BUT HIGHLY RESISTANT
• CORROSION-PROOF AND COMPATIBLE WITH DIFFERENT TYPES OF MORTARS (LIME, CONCRETE, POZZOLAN BASED, ETC.)
• REDUCED WEIGHT AND THICKNESS
• EFFICIENT AND DURABLE CONSOLIDATION
• DIFFUSED AND HOMOGENEOUS MECHANICAL IMPROVEMENT
• SIMPLE AND RAPID INSTALLATION
• REDUCED HANDLING, INSTALLATION TIME AND COST