Abstract
In this study, experimental analysis on the compressive strength of multi-leaf thin-tile masonry is presented. A compressive strength test was carried out on thin-tile, mortar and 48 specimens with two- and three-leaf thin-tile masonry. The results obtained were compared with literature on brick masonry loaded parallel to a bed joint. Based on the results of this study, the failure mode presented the first crack in the vertical interface; this crack grew until the leaf was detached. From this point until collapse, lateral buckling of the leaves was generally observed. Therefore, the detachment compressive strength value was considered relevant. Up to this point, both masonries exhibit similar stress–strain behavior. The experimental values of the detachment compressive strength were compared with the values calculated from the equation generally used in the literature to evaluate the compressive strength of brick masonry. From the results obtained, the following conclusion can be drawn: This equation is only suitable for tree-leaf thin-tile masonry but with more relevant influence on the compressive strength of the mortar. This study concluded that only three-leaf specimens behave similarly to brick masonry loaded parallel to a bed joint. Finally, whether the failure mode was due to shear or tensile stresses in the vertical thin-tile-mortar interface cannot be identified.
Highlights
Structural elements, such as load-bearing walls, arch and vaults, built with ceramic masonry (Figure 1a), are common in historical buildings
The goal of this study was to verify whether the proposed compressive strength exponential equation for masonry loaded parallel to the bed joints was applicable to thintile masonry
The failure mode was initiated by splitting around the horizontal mortar joint of one of the thin-tile leaves, affecting one or two vertical thin-tile-mortar interfaces
Summary
Structural elements, such as load-bearing walls, arch and vaults, built with ceramic masonry (Figure 1a), are common in historical buildings. A singular case is the masonry used to build the thin-tile vault. This is characterized by the use of several leaves of thin tile, placed flat between leaves of mortar approximately 10 mm thick (Figure 1b). The thin tile was bonded with gypsum or lime mortar, while cement mortar is commonly used in current structures. This structural element is characterized by being subjected to compressive stress, with the particularity of applying the load parallel to the face of the thin tile
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