Microstructure and mechanical performance of modified mortar using hemp fibres and carbon nanotubes

Microstructure and mechanical performance of modified hemp fibre and shiv mortars: Discovering the optimal formulation

“…With regard to the considered lengths, this aspect ratio evolves between 1 and 1000. In addition, the hemp fibres exhibit a transverse aspect ratio (ratio between transverse dimensions) of 3.05 ± 0.67 as shown in [28]. The untreated fibres are composed of bundles with a significant amount of surface defects.…”

“…Soaking of hemp fibres and shives is performed based on a former study showing the beneficial effect of using wet hemp on mechanical performance of modified mortar [28]. Soaking is performed at room temperature for a duration ranging between 15 and 20 min (Fig.…”

“…Fibre content and dimensions are by far the most important tuning parameters to modulate cementitious composite properties [28,29]. Even with these levers in hand, superior mechanical performance is not yet obtained without considering chemical modification of the fibre itself that exposes more cellulose properties.…”

“…Some of the recent contributions suggest the use of additives to ensure better durability and optimum mechanical performance of hemp modified cementitious composites [28,30]. This approach proves to be effective for pure cementitious materials [31].…”

Strength, energy absorption capability and self-sensing properties of multifunctional carbon nanotube reinforced mortars

“…The improvement was 11% higher than blended mortar containing 6.0 wt% NMK but the addition of CNTs at amount of 0.1 wt% leads to decreases the compressive strength. Hamzaoui et al [11] used pre-prepared aqueous solutions which contain CNTs at different amounts of 0.01, 0.02, 0.03, 0.04, 0.05 and 0.06 wt% of cement. The authors concluded that the mortar nanocomposites reinforced with CNTs at an amount of 0.01 wt% exhibit a 29% and 21% increase in flexural strength and compressive strength, respectively.…”