Mechanical-physical experimental tests on lime mortars and bricks reinforced with hemp

Textile-to-mortar bond behaviour in lime-based textile reinforced mortars

“…The mechanical properties of TRMs and their effectiveness in enhancing the performance of strengthened structural components are influenced by the properties of the mortar (TRM matrix), the properties of the fabric, the fibre-to-mortar bond behaviour and the TRM-tomasonry bond behaviour [1,11,12]. Although mechanical characterization of TRMs [2,3,[13][14][15] or the bond between TRMs and masonry substrates [16][17][18] have been the subject of several experimental and numerical studies, the fabric-to-mortar bond behaviour, the main mechanism controlling the nonlinear response and cracking of TRM composites, has only received a limited attention especially in case of lime-based TRMs [1,19,20]. A fundamental understanding of this mechanism and the parameters affecting that, currently missing, is critical for development of TRM composites with enhanced mechanical properties and for fit-for-purpose design of TRMs for strengthening applications.…”

Seismic and Thermal Retrofitting of Masonry Buildings with Fiber Reinforced Composite Systems: A State of the Art Review

“…Different varieties of plant fibers have been used for the same purpose in the last years: Raw hemp fiber (Formisano et al, 2017), hemp fiber mesh (Menna et al, 2015), flax fibers and fabrics (Ferrara et al, 2020), jute (Formisano et al, 2019), palm oil fiber (Raut and Gomez, 2016), date palm fiber (Benmansour et al, 2014), banana leaves, reed, palm tree leaves and coconut seeds (Al-Zubaidi, 2018).…”

“…Till date the hemp as natural fiber reinforcement material has been used both in raw (cut in pieces) as well as in mesh form. Formisano et al (2017) have prepared mortars and bricks reinforced with hemp fibers and hemp shives respectively. Menna et al (2015) have focused their work to retrofit both tuff and clay masonry walls with the application of hemp fiber composite grid along with Pozzolanic and lime-based mortar.…”

“…The plaster or mortar materials and fibers mixture consistency and therefore their usability is usually verified by the standard shaking table tests as reported in (Raut and Gomez, 2016;Formisano et al, 2017;2019). In addition, other physical properties are studied like Bulk density in (Raut and Gomez, 2016); the water absorption in (Benmansour et al, 2014;Raut and Gomez, 2016;Formisano et al, 2019) and the apparent porosity in (Raut and Gomez, 2016).…”

“…Hemp fibers and shives have been used to prepare mortar and bricks by (Formisano et al, 2017) in order to evaluate their mechanical behaviors. It has been found that the performance increment was of about 29% in reinforced mortar specimens under bending tests.…”