PSI - Issue 44

Giorgio Giacomin et al. / Procedia Structural Integrity 44 (2023) 610–617 Giorgio Giacomin et al. / StructuralIntegrity Procedia 00 (2022) 000–000

615

6

Table 2. Mechanical parameters masonry reinforced with FRCM system.

f c [N/mm 2 ]

τ c [N/mm 2 ]

E eq [N/mm 2 ]

G eq [N/mm 2 ]

Type of masonry

Messy stone masonry (pebbles, erratic and irregular stones) Solid brick and lime mortar masonry

1,94

0,075

1326

530

3,82

0,14

1935

774

From the results obtained, it is possible to deduce how the resistant capacities of solid brick and lime mortar masonry panels, for example, especially under shear actions, are increased by about 55% the thanks precisely to the shear contribution offered by the B-NET 450 BA basalt fiber mesh for the FRCM reinforced plaster system. Below is an application scheme of the intervention and some pictures of the application of the FRCM system. 1. removal of existing plaster and possible consolidation of masonry with reconstruction of deteriorated areas by means of LIMECRETE lime-based mortars; 2. engaging of GFIX glass fiber bows connectors: • drilling the hole 14 to 16 mm in diameter; • engaging the connector, for at least 2/3 of the wall thickness or passing through, in the hole with RESIN 75, after cleaning the same. It is recommended to arrange, in quincunx, at least no. 4 connectors per sq. m.; 3. making the first layer of LIMECRETE natural lime mortar, after wetting the substrate. 4. rowning, in the mortar while still fresh, a layer of 400 g/m 2 B-NET 450 BA basalt fiber mesh with overlap minimum of 10 cm of the mesh; 5. unfolding of the GFIX bows, for at least 15 cm, over the mesh and impregnating with epoxy adhesive RESIN 75, application of quartz dusting; 6. application of the second layer of LIMECRETE natural lime mortar to cover the mesh while the first layer still has a wet consistency. Total mortar thickness at least 15 to 20 mm; 7. possible finishing with civil or other plaster.

Fig. 4: Application of the FRCM system.

9. SRG system:floor strips

In order to improve the connection and chaining of orthogonal walls to each other, increase the horizontal flexural strength and encourage a box-like behaviour of the building, it is proposed to reinforce portions of the building by