A new technique for reinforcing rubble stone masonry walls (double and triple-leaf walls), when it is required to keep the fair-face masonry. The reinforcement technique consists of a continuous mesh made of tiny steel cords embedded perfectly in the mortar joints after a first repointing, and anchored to the wall by means of galvanized steel eyebolts driven into the facing. A second repointing covers the cords and the heads of the eyebolts completely. This leads to genuine reinforced fair-face masonry in which, as already confirmed by the first experiments, the compression, shear and flexural strength are increased, effective transverse connection between the facings of the masonry due to the presence of the eyebolts and also the capacity to withstand tensile stresses. The reinforcement is non-invasive and reversible, and is aimed at integrating the masonry rather than transforming it. It is compatible with preservation of the material of which the artefact is made and is long-lasting in view of the materials used, which are very resistant to aggression. The analysis of this reinforcement/upgrading work has led to the formulation of practical criteria for sizing the reinforcement and to the assessment of the strength of the reinforced panel.
Consolidation and Reinforcement of Stone Walls using a Reinforced Repointing Grid
BORRI, Antonio;CORRADI, Marco;SPERANZINI, Emanuela;
2008
Abstract
A new technique for reinforcing rubble stone masonry walls (double and triple-leaf walls), when it is required to keep the fair-face masonry. The reinforcement technique consists of a continuous mesh made of tiny steel cords embedded perfectly in the mortar joints after a first repointing, and anchored to the wall by means of galvanized steel eyebolts driven into the facing. A second repointing covers the cords and the heads of the eyebolts completely. This leads to genuine reinforced fair-face masonry in which, as already confirmed by the first experiments, the compression, shear and flexural strength are increased, effective transverse connection between the facings of the masonry due to the presence of the eyebolts and also the capacity to withstand tensile stresses. The reinforcement is non-invasive and reversible, and is aimed at integrating the masonry rather than transforming it. It is compatible with preservation of the material of which the artefact is made and is long-lasting in view of the materials used, which are very resistant to aggression. The analysis of this reinforcement/upgrading work has led to the formulation of practical criteria for sizing the reinforcement and to the assessment of the strength of the reinforced panel.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
