A very common type of floor used in the buildings erected in the early 20th century is mixed concrete and masonry, made of reinforced concrete joists with a main structural function and of lightening elements (hollow blocks). Usually, their extrados is finished with a conveniently reinforced coat of concrete, aimed at sharing the loads throughout all the ribs.
The strain and operating conditions a floor must endure over time may cause the structure to deteriorate, and consequently lose mechanical resistance. A typical degradation, also called “delamination”, may happen when the intrados masonry elements peel and fall off. This can cause damage to people and things. The trouble is found in a high number of edifices built between the 1940s and 1970s, when construction materials, and namely bricks, were very poor in quality.
To help secure degraded floors, Fibre Net developed FIBREBUILD FRCM system, which consists in adding a GFRP mesh conveniently anchored to the intrados joists, and finally covered with plaster. Because the materials are lightweight and practical, the system offers the advantage of being easily and fast installed and of guaranteeing mechanical efficiency and durability also in humid or chemically aggressive environments.
REINFORCED RENDER METHOD
Degradation (delamination) may happen when the intrados elements of hollow blocks peel and off in concrete and masonry floors. The trouble is normally found in a high number of buildings erected from the early 20th century through the 1950s and 1960s, and poses a risk for people’s safety. This type of degradation may arise from a number of conditions: different 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 a preformed GFRP mesh conveniently anchored to the intrados 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.)
• LOW-WEIGHT AND THIN
• EFFICIENT AND DURABLE CONSOLIDATION
• DIFFUSED AND HOMOGENEOUS MECHANICAL IMPROVEMENT
• EASY AND FAST INSTALLATION
• REDUCED HANDLING AND INSTALLATION COST AND TIME SECURING FLOORS