Geopolymeric matrices containing different MWCNTs concentrations (0.0%, 0.1%, 0.5% and 1.0% by weight) were synthesized and their mechanical properties (i.e., flexural strength, Young's modulus, flexural toughness and fracture energy), electrical conductivity and piezoresistive response were determined.
After FDM fabrication, effects on the tensile properties (including tensile strength, Young's modulus, toughness, yield strength, and ductility) and flexural properties (including flexural stress, flexural modulus, flexural toughness, and flexural yield strength) of specimens were experimentally investigated.
Moreover, the cracking time was analysed in regard to flexural strength, flexural modulus and flexural toughness.
The excellent reinforcing capability of MWCNTs is demonstrated by a significant improvement in flexural strength (87%), Young's modulus (92%), flexural toughness (83%), first crack strength (64%) and first crack toughness (65%).
The experimental results also showed that the addition of MWCNTs increased the flexural strength, Young's modulus and flexural toughness by as much as 160%, 109% and 275%, respectively.
With the addition of ∼0.242 wt% PC@GO (PC 0.22 wt%, GO 0.022 wt%) of cement, the compressive strength, flexural strength, Young's modulus and flexural toughness can be increased to 34.10%, 30.37%, 32.37% and 33%, respectively at early days.
To investigate different characteristics of the concrete specimens several destructive and non-destructive tests, such as compressive strength, modulus of rupture, flexural toughness, ultrasonic velocity and electrical resistance tests were carried out.
The porous structure, measured by image analysis, and mechanical properties (elastic modulus, flexural strength and toughness) of carbons prepared from phenolic resins (novolaks) by a powder pressing method are compared to those of glassy carbons prepared by casting of liquid resins.
Optimal polymer content in emulsion (0.0513%) is found to increase the compressive strength, modulus of rupture and flexural toughness 25%, 28%, 387% respectively as compared to control mortar.
In addition, the modulus of rupture and flexural toughness of FRHPC prisms were calculated based on the flexural testing results.
Mechanical properties were studied by conducting compressive strength, splitting tensile strength, modulus of rupture and flexural toughness tests.
