CNTs Addition Research Articles

Controllable Self-Assembly of Carbon Nanotubes on Ammonium Polyphosphate as a Game-Changer for Flame Retardancy and Thermal Conductivity in Epoxy Resin.

The optimization of flame retardancy and thermal conductivity in epoxy resin (EP), utilized in critical applications such as mechanical components and electronics packaging, is a significant challenge. This study introduces a novel, ultrasound-assisted self-assembly technique to create a dual-functional filler consisting of carbon nanotubes and ammonium polyphosphate (CNTs@APP). This method, leveraging dynamic ligand interactions and strategic solvent selection, allows for precise control over the assembly and distribution of CNTs on APP surfaces, distinguishing it from conventional blending approaches. The integration of 7.5wt.% CNTs@APP10 into EP nanocomposites results in substantial improvements in flame retardancy, as evidenced by a limiting oxygen index (LOI) value of 31.8% and achievement of the UL-94V-0 rating. Additionally, critical fire hazard indicators, including total heat release (THR), total smoke release (TSR), and the peak intensity of CO yield (PCOY), are significantly reduced by 45.9% to 77.5%. This method also leads to a remarkable 3.6-fold increase in char yield, demonstrating its game-changing potential over traditional blending techniques. Moreover, despite minimal CNTs addition, thermal conductivity is notably enhanced, showing a 53% increase. This study introduces a novel approach in the development of multifunctional EP nanocomposites, offering potential for wide range of applications.

High-performance thin film composite forward osmosis membrane for efficient rejection of antimony and phenol from wastewater: Characterization, performance, and MD-DFT simulation

The effective removal of heavy metals and phenolic pollutants from aqueous solutions has received widespread attention in the field of wastewater treatment. In this work, a novel PAN/CNTs/UiO-66-NH2 modified forward osmosis (FO) membrane was prepared for efficient removal of antimony (Sb) and phenol from wastewater. The membrane was synthesized using a facile and cost-effective method. The PAN/CNTs substrate membrane was prepared using electrospinning technology, and UiO-66-NH2 MOF particles were loaded onto the surface of the active layer during the interfacial polymerization (IP) process. The presence of CNTs in the spinning solution regulated the pore structure and properties of nanofibers. Characterization of the membrane confirmed its unique structure and enhanced properties. When the CNTs addition was 0.01 g, and UiO-66-NH2 addition was 0.05 wt%, the FO membrane exhibited the optimal operational performance. In the AL-FS mode, the water flux, reverse salt flux (RSF), and Js/Jw ratio were 14.68 LMH, 0.17 gMH, and 0.01 g/L, respectively. As a comparison, the water flux, RSF, and Js/Jw ratio were 21.19 LMH, 0.65 gMH, and 0.032 g/L in the AL-DS mode, respectively. Simultaneously, efficient removal of antimony and phenol was achieved in both modes, with antimony removal efficiencies of 99.26 % and 97.98 %, and phenol removal efficiencies of 96.61 % and 93.18 %, respectively. The modified membrane exhibited excellent performance in rejecting Sb and phenol. Molecular dynamics simulations and density functional theory calculations provide theoretical support for the excellent performance of membranes. The membrane demonstrated a high water flux, making it promising for practical applications. Additionally, it exhibited remarkably low reverse salt flux, highlighting its suitability for desalination processes. The exceptional removal efficiency of Sb and phenol, coupled with the membrane's impressive hydraulic performance, makes it a promising candidate for the treatment of industrial effluents containing these challenging contaminants. The results presented in this study underscore the potential of PAN/CNTs/UiO-66-NH2 FO membranes as an advanced solution for addressing water pollution challenges.

Novel nanocomposites based on Tetrazine liquid crystals for energy storage application

Polymethyl methacrylate (PMMA) /Tetrazine liquid crystal (LCTZ12) nanocomposites with different CNTs loadings have been prepared. The prepared nanocomposites were characterized using polarizing light microscope (POM), differential scanning calorimetry (DSC), Fourier transform Infrared Spectroscopy (FTIR) and broadband dielectric spectroscopy (BDS) in the range 10-1-106 Hz respectively. The most commonly observed texture of soft crystal phases was that of a mosaic pattern, as revealed by the POM technique. PMMA alone does not change the polarization states and appeared as isotropic material, but once LCTZ12 is added, crystal growth could be clearly noticed in the needle pattern inside the polymer matrix to compose an amazing structure of soft crystal G texture. The increase of LCTZ12 to about 20 wt% in the PMMA matrix led to more heterogeneous aggregation of liquid crystalline molecules. This ratio addition is enhancing of network connections inside the PMMA. Moreover, the dispersion of carbon nanotubes mounted on catalysts is found to accumulate in segregations in PMMA/ LCTZ12 nanocomposites. However, the location of CNTs is concentrated at bottom of polymer network due to the large difference in densities of LCs, PMMA, and CNTs. DSC is in agreement with the POM result of LCTZ12, which has multi soft crystals or highly self-assembled ordered liquid crystal phases near to room temperature. The FTIR proved that blend PMMA/ LCTZ12 (80/20) has a dramatic increase in the 1387 cm−1 peak of C = C as a response of the rise in the concentration or number of aromatic rings. Additionally, the vibrational scissoring peak located at 1477 cm−1 of methylene CH2 groups is increased significantly and C–H stretching in aliphatic regions at 2850 cm−1 and 2990 cm−1 as well. However, there is no significant change observed after CNTs addition to the PMMA/ 20 wt% LCTZ12 matrix. Regarding dielectric results, it was found that, the polymer dispersed liquid crystals PDLC system composed of (PMMA/20 wt% LCTZ12) possesses the most promising dielectric properties, that is; high dielectric permittivity with low losses compared to the other ratios. The addition of CNTs results in more localization of charge carriers along with mobile ions, causing higher ionic conductivity. The conductivity ranges altered from 3.2 × 10-10 S/cm in pure PDLC system to become 1.7 × 10-3 S/cm for PDLC doped with 10 wt% CNTs nanocomposite. The electrical energy density measurements for 3,6-bis(5-(Dodecyloxy) pyridin-2-yl)-1,2,4,5-tetrazine (LCTZ12) liquid crystals with 6 cationic centers in polymeric matrices proved to be suitable for flexible and efficient electrolytes for energy storage devices.

One-step fabrication of amorphous/ITO-CNTs coating by plasma electrolytic oxidation with particle addition for excellent wear resistance

As moving machine parts, aluminum alloys suffer from poor wear resistance, however, the combination of amorphous materials and anti-friction lubricant phases has rarely been investigated to improve tribological performance. The amorphous coatings were fabricated by one-step plasma electrolytic oxidation (PEO) with ITO and CNTs addition, of which CNTs were used as lubricant additives to enhance the anti-friction properties of aluminum alloy. It is found that the amorphous phases in the coatings increase with ITO concentration in the electrolyte. As well as, when the concentration of ITO in the electrolyte reaches 40 g/L, XRD cannot detect Al2O3 phase, but only ITO and amorphous phase. The formation of the amorphous coating is due to the fact that In3+ can be used as a network modifier to improve the glass-forming ability of molten oxides and the rapid cooling after discharge. Further, the amorphous coating exhibits a higher hardness (1472 HV0.5) compared to single Al2O3 coatings (267 HV0.5) and its main wear mechanism is adhesive wear with a high friction coefficient (∼0.68). In contrast, with the incorporation of CNTs, the amorphous coating exhibits slight abrasive wear after 6000 sliding cycles under dry friction conditions, with a stable frictional coefficient of around 0.14. Of which, the amorphous coating (1704 HV0.5) serves as a load-bearing and CNT acts as a lubricant phase during friction and wear. Hence, through the synergistic effect of the CNTs additive and the amorphous coating, the tribological properties of aluminum alloy are significantly improved, with a low friction coefficient and shallow wear trace.

In situ anchoring of Fe3O4/CNTs hybrids on basalt fiber for efficient electromagnetic wave absorption

The development of practical and efficient electromagnetic wave (EMW) absorbing materials is a challenging research problem. A mussel-inspired molecular structure regulation strategy using polydopamine to increase the roughness and functional groups of basalt fiber (BF) surface, which can improve the fiber interfacial adhesion. Herein, a novel BF-Fe3O4/CNTs heterostructure is synthesized through a dip-coating adsorption process. The three-dimensional network structure of Fe3O4/CNTs hybrid in situ anchored on the surface of BF, which endows the composite to have good intrinsic magnetic and dielectric properties. Modulation of EMW absorption performance by controlling the addition of CNTs, the minimum RL of BF-Fe3O4/7C reaches to −40.57 dB at a thickness of 1.5 mm with CNTs addition of 7%. The enhanced EMW absorption performance of BF-Fe3O4/7C heterostructure may be attributed to the synergistic effects of interfacial polarization between the hollow magnetic Fe3O4 spheres and CNTs, conduction loss, magnetic resonance loss and multiple reflection/scattering inside the BF. This work provides a simple pathway to design EMW absorbing materials with good environmental stability.

Effect of CNTs content on the mechanical and arc-erosion performance of Ag-CNTs composites

Adding strengthening phase is an important way to improve the arc erosion and anti-welding performance of Ag-based electrical contact materials. Ag-CNTs composites with different contents of CNTs were prepared by electroless silver plating, high-energy milling and powder metallurgy. The effect of CNTs addition on strengthening mechanism and arc erosion behavior of Ag-CNTs were investigated. The results show that agglomerating degree of the CNTs increases with the increase of content. CNTs distribute mainly at the grain boundaries and partially in the grains along the processing direction. The processing can disintegrate CNTs clusters which is beneficial for the dispersion of CNTs. With the increase of CNTs content, strength of the composite first increases then decreases while the elongation and electrical resistivity decreases.. The maximum yield strength (245 MPa) and tensile strength (296 MPa) was achieved when the CNTs content was 8 vol%. The electrical breakdown tests show that the addition of CNTs can obviously stabilize the arc and reducing welding. Materials transfer from the anode to the cathode and the transfer mass first decreases then increases with the CNTs content increasing. The Ag-CNTs composite with 8 vol% CNTs added presents the desired properties of stable arc and no obvious craters or pips on the eroded surface. Excessively high CNTs content will lead to the decreasing of strength and serious arc erosion.

Simultaneously optimized thermoelectric and mechanical performance of p-type polycrystalline SnSe enabled by CNTs addition

A series of SnSe/carbon nanotubes (SnSe/CNTs) composites, with homogeneous distribution of CNTs, were fabricated by combining solution synthesis with fast sintering. Enabled by CNTs addition, both the electrical conductivity and power factor are improved significantly; the lattice thermal conductivity is suppressed due to strengthened phonon scattering. As a result, a maximum zT of 0.90 is obtained in the SnSe/CNTs composite with 0.20 wt.% CNTs, ∼ 90% higher than that of SnSe. In addition, the composite with 0.35 wt.% CNTs exhibits a dramatically increased compressive strength of 135 MPa, representing an ∼ 81% increase. This work offers a composite design strategy for synergistically improving both thermoelectric and mechanical properties of polycrystalline SnSe.

Synthesis of composite TiO2/CNTs via sol-gel route as electrode materials for supercapacitors

Supercapacitor is considered as a promising energy storage devices because supercapacitors can provide higher power densities than lithium-ion batteries. Besides traditional carbon materials, the development of metal oxide composite materials with carbon is considered a new direction to improve the weaknesses of current supercapacitors. The metal oxide composite nanomaterial not only offers high charge storage capacity, but also improves the discharge efficiency and life cycle of the supercapacitor. In this study, TiO2/CNTs nanocomposite materials (with CNTs ratio of 0.5% and 1%, respectively) were synthesized by sol-gel route and considered as electrode materials for supercapacitor. The composite materials were investigated by structural and morphological analysis methods, which showed the addition of CNTs did not change the original material structure; besides, the presence of CNTs improve the porous structure of TiO2 to support the penetration of the electrolyte. Cyclic voltammetry results showed the efficiency of CNTs addition through the increase of specific capacitance from 171 F/g (K0 sample) to 205 F/g (K1 sample). The EIS spectrum also shows the role of CNTs in the composite when reducing the internal resistance as well as the charge transfer resistance in the high frequency region. The galvanostatis cycling performance showed that K1 (with 1% CNTs) had the highest capacitance, reaching 128 F/g and remained stable after 2000 cycles at a current density of 1 A/g in the region potential 0-1.8 V.

Thermal and electrical conduction of AL/CNT composite

Authors have investigated the thermal and electrical conduction behavior of Al/MWCNT composite fabricated by powder metallurgy method in which CNTs were pre-encapsulated with Ni. The thermal and electrical conductivity values were found proportional to the addition of CNTs. For 2.5% wt. CNTs addition with HIP treatment, the Al/CNT composite showed thermal conductivity of 476 W/m-k which is about 85% higher than the value of pure Al. Also, the resultant electrical conductivity was 0.405 × 10−8 S which is about 14% higher than the value of pure Al. The increased thermal and electrical conductivity can be attributed mainly to the well dispersion of CNTs through Ni-encapsulation and the enhanced interfacial bonding of Ni-coated CNTs with the matrix. Due to having good electrical conductivity of nickel itself, electrical conductivity of the composite was also enhanced which was further confirmed from First Principle study.

On the higher-order thermal vibrations of FG saturated porous cylindrical micro-shells integrated with nanocomposite skins in viscoelastic medium

Since the multi-layered structures are widely used nowadays, and due to interesting applications of cylindrical shells, this study is dedicated to analyzing free vibrational behaviors of functionally graded saturated porous micro cylindrical shells with two nanocomposite skins. Based on Biot's assumptions, constitutive relations for the core are presented and effective properties of the skins are determined via the rule of mixture. A sinusoidal theory is used to capture the shear deformation effects, and to account for the scale effects, the modified couple stress theory is employed which suggests a material length-scale parameter for predicting the results in small-dimension. With the aid of extended form of Hamilton's principle for dynamic systems, differential equations of motion are extracted. Fourier series functions are used to obtain natural frequencies and after validating them, a set of parametric studies are carried out. The results show the significant effects of porosity and Skempton coefficient, pores placement patterns, CNTs addition and distribution patterns, temperature variations, material length-scale parameter and viscoelastic medium on the natural frequencies of the microstructure. The outcomes of this work could be used to design and manufacture more reliable micro cylindrical structures in thermo-dynamical environments.

Damping characterization and its underlying mechanisms in CNTs/AZ91D composite processed by cyclic extrusion and compression

The proper combination of strength and damping performance has been a major challenge for the wide use of Mg alloys/composites in many fields. In this regard, this research focused on the effect of the CEC process and the CNTs addition on the damping behavior of AZ91D alloy. The damping capacity of CEC-processed CNTs/AZ91D composite is significantly improved compared with the initial solid-solution state. Also, although 0.5 wt% addition of CNTs to AZ91D decreases the room-temperature damping of the base alloy, its performance can be improved by the addition of 2.0 wt% CNTs. Besides, the addition of CNTs, regardless of its amount regularly increases the high-temperature damping behavior compared to the base alloy. For the solid-solution alloy/composite, when the test temperature is lower than the critical temperature, the damping is mainly advanced by the movement of dislocations between a large number of weak pinning points and a low amount of strong pinning points. Contrarily, the damping mechanism of the same material at higher than critical temperatures is mainly progressed by grain boundary sliding.

Influence of aging treatment on mechanical properties of CNT/Al–Cu–Mg rolled composites

Influence of aging treatment on mechanical properties was investigated in the CNT/Al–Cu–Mg rolled composites. The tensile strength of composites was strongly dependent on the aging annealing treatment, and stronger aging effect was observed in the composites compared with matrix alloy. The ultimate tensile strength was highest in the CNT/Al–Cu–Mg composites with peak-aging treatment, however, it sharply decreased when samples were over-aged. In addition to the load transfer and grain refinement, CNTs addition introduced strong back stress, and the aging nanoprecipitation strengthening promoted the strain hardening capability, which both significantly improved the ultimate tensile strength of composites.

Cement slurries with the addition of carbon nanotubes for sealing boreholes with high temperature and reservoir pressure (150°C, 90 MPa)

The article presents the results of the influence of carbon nanotubes on the mechanical parameters of cement stones under high temperature and pressure conditions (150°C, 90 MPa). The tests used multi-walled carbon nanotubes (MWCNTs) with an external diameter of 10–20 nm and a length of 10–30 μm. Cement slurries contained 0.1% of CNTs bwoc (by the weight of cement). Laboratory tests of cement slurries were carried out at the Oil and Gas Institute – National Research Institute. The tests were carried out under conditions of increased pressure and temperature at 150°C, 90 MPa. Cement slurries were prepared on the basis of class G drilling cement. Developing recipes were guided by the requirements to be met by cement slurry for the cementing of casing in the conditions of high temperature and reservoir pressures. The densities of tested slurries ranged from 1900 kg/m3 to 2250 kg/m3 (slurries with the addition of hematite). The cement slurries were tested for density, fluidity, rheological parameters, filtration and thickening time. Compressive strength tests and measuring adhesion were carried out after 2, 7, 14 and 28 days. Cement slurry recipes with very good technological parameters were developed and after curing (after 28 days of hydration) had very high values of compressive strength, reaching up to 45 MPa. Cements were characterized by high values of adhesion to pipes reaching up 7 MPa after 28 days. The research showed significant information about possible applications of carbon nanotubes to modify the cement slurry under conditions of high temperature and pressure. The conducted tests confirmed that the addition of even small amounts of CNTs improves the mechanical parameters of the cement stone compared to the base sample without such addition, and also reduces the thickening time of cement slurries and reduces filtration. It is investigated that CNTs addition increases the viscosity and yield point of cement slurry. As a result, slurries with the addition of MWCNTs will more effectively displace the mud from the borehole and significantly affect the quality of cementation.

Effect of CNTs on the intermetallic compound growth between Sn solder and Cu substrate during aging and reflowing

Sn is the main interconnect material for three-dimensional (3D) Packaging of chip stacking in electronic packaging. In this paper, the intermetallic compound (IMC) produced through an interfacial reaction between Sn-xCNTs (x = 0, 0.075 wt%) solder and a Cu substrate was evaluated at 130 °C, 150 °C, and 170 °C for 30, 50, 100 h and after multiple reflows (3, 6, 9). In Sn-0.075CNTs system, CNTs inhibited the growth of Cu6Sn5 and refine the microstructure of solder joint. The growth rate of IMC decreased after reflowing and aging for 100 h. Compared to pure Sn/Cu system, the thickness of Cu6Sn5 and Cu3Sn was the thinner when the CNTs addition amount was 0.075 wt%. Some voids and cracks were formed in solder joints after reflowing and thermal aging. At this time, the IMC growth activation energies of Sn solder is 33.256 kJ/mol, and that of Sn-0.075CNTs composite solder is 58.19 kJ/mol.

The influence of CNTs addition on Mn-Ce/TiO2 catalyst for low-temperature NH3-SCR of NO

Mn-Ce/TiO2 and Mn-Ce/TiO2-CNTs were tested for the low-temperature selective catalytic reduction of NO with NH3. The CNTs were in intimate contact with the catalyst surface, and the catalyst crystallinity, BET surface area, and porosity barely changed after CNTs addition. Compared to Mn-Ce/TiO2, Mn-Ce/TiO2-CNTs exhibited superior catalytic activity and N2 selectivity at 140–240 °C. High Mn4+ concentration and abundant chemisorbed oxygen species were found on the Mn-Ce/TiO2-CNTs. Monodentate nitrate species were mainly formed on Mn-Ce/TiO2-CNTs, which reacted with NH3, leading to a more reactive intermediate (Mn(n-1)+–O–NO2[NH3]2). Therefore, CNTs addition provided an enhanced favorable NOx adsorption sites resulting in high catalytic efficiency.

Polyacrylonitrile (PAN) based electrospun carbon nanofibers (ECNFs): Probing the synergistic effects of creep assisted stabilization and CNTs addition on graphitization and low dimensional electrical transport

We report on the fabrication of Polyacrylonitrile (PAN) based electrospun carbon nanofiber (ECNF) reinforced with multi-walled carbon nanotubes (MWCNTs) and characterization of the graphitic structure as well as electrical transport properties for four different ECNF systems. The different systems were obtained by the combination of two different ways of cyclization for pristine PAN and PAN with CNTs addition (PAN/CNT), typically by the application of constant creep stress and a constraint fixing. The addition of CNTs improved the graphitic structure of PAN. For the detailed analysis of different systems, carbonization was performed at 1700 °C and the graphitic structures were characterized. The CNTs improve the alignment of graphitic domains even for non-creep cyclized systems. The application of creep stress during cyclization results in highly aligned graphene planes. However, the creep stress cyclized PAN/CNT system exhibited a reduction in the alignment of graphene planes coming along with the observation of discontinuous, randomly orientated domains and a reduced conductivity. The electrical anisotropy increased for creep cyclized PAN and PAN/CNT compared to non-creep stress cyclized system. Our findings reveal that electrical transport in carbon nanofibers need to be considered as a cumulative effect of hopping and band transport along chemically and structurally inhomogeneous ECNFs.

Effect of carbon nanotubes content on microstructure and properties of WC/Ni laser cladding coatings

ABSTRACT To enhance the mechanical properties of Ni–WC coatings, the carbon nanotubes were used as reinforced materials by laser cladding. Optical microscopy (OM), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were used to investigate the effect of CNTs content on the phase composition and microstructure. The microhardness and wear resistance were measured by Vickers hardness testing and friction wear testing. Experimental results showed that the new phases Cr2Fe14C are found in the coatings with CNTs, the grain size is finer than that of the coating without CNTs. The microhardness and wear resistance of the coatings with CNTs content ranging from 0 to 5 wt-% present increase initially and then decrease trend. The coatings with 3 wt-% CNTs have the highest microhardness and wear resistance, which proved that the appropriate amount of CNTs addition is 3 wt-%.

Silicon Nitride-Based Composites with the Addition of CNTs-A Review of Recent Progress, Challenges, and Future Prospects.

In this overview, the results published to date concerning the development, processing, microstructure characteristics, and properties of silicon nitride/carbon nanotube (Si3N4 + CNTs) composites are summarized. The influence of the different processing routes on the microstructure development of the Si3N4 + CNTs is discussed. The effects of the CNTs addition on the mechanical properties—hardness, bending strength and fracture toughness—and tribological characteristics—wear rate and coefficient of friction—are summarized. The characteristic defects, fracture origins, toughening and damage mechanisms occurring during the testing are described. The influence of the CNTs’ addition on the thermal and functional properties of the composites is discussed as well. New trends in the development of these composites with significant potential for future applications are outlined.

Microstructure-Electrochemical Behaviour Correlation for Nico-GO and Nico-Mwcnts Composite Coatings

NiCo coatings are widely used in sensors, actuators and as protective coatings. Recent studies have shown that addition of foreign particles like Al2O3, SiC and TiO2 promotes grain randomization and refinement resulting in improved corrosion resistance performance. In the present work, NiCo coating containing varying amount of graphene oxide (GO) and multi-walled carbon nanotubes (MWCNTs) were electrodeposited over mild steel substrate. Microstructure and corrosion behavior of these composite coatings were then studied as a function of the volume fraction of the secondary additives. NiCo-GO & NiCo-CNT composite coating were characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) for phase identification, morphology and composition respectively. Potentiodynamic polarization studies and electrochemical impedance spectroscopy (EIS) studies in 3.5 wt. % NaCl solution revealed that the corrosion behavior of the coatings was very sensitive to the concentration of GO/ MWCNTs in the coating matrix. With continuous increase in the amount of GO/CNT in the coatings, the corrosion resistance first increased followed by a decrease, indicating possibility of an optimum with respect to the amount of the additives for achieving high corrosion resistance performance. On analyzing the electrolytic bath solution, we observed that nickel ions (Ni+2) showed preferential deposition onto the graphene oxide sheets resulting in a compositional heterogeneity near and far from the graphene-metal interface in the electrodeposited coating microstructure. This compositional segregation led to a change in the relative abundance of low angle and high angle boundaries in the coating microstructure. Electron backscattered diffraction (EBSD) technique was used to study the type of grain boundaries, strain in the grain and average grain size (area) of the samples (prepared using focused ion beam FIB). The data revealed that the samples exhibiting maximum corrosion resistance (optimum CNT/ GO concentrations) also had the highest fraction of low angle grain boundaries (LAGBs) with no additional strain in the matrix. Further increase in GO concentration resulted in more grains with high misorientation angle. In case of CNTs addition, the coatings were found to be hydrophobic in nature with a grain growth along low energy (111) direction. Figure 1

Influence of Multi-walled carbon nanotubes on mechanical properties of cement concrete

The mechanical characteristic of cement concrete with incorporation of multi-walled carbon nanotubes (MWCNT) has been investigated in this paper. Disparate concrete mixes were prepared incorporating CNT-to-cement weight fractions of 0.075, 0.1, 0.125 wt.% in traditional concrete. The flexural and compressive strength were determined after 7 and 28 days of curing. The results of the experimental work showed the maximum increase in the strength was almost 1.5times than the conventional concrete which is believed to occur due to effective dispersion and nano-scale particle size. This was obtained in mix containing 0.075 wt.% of CNTs, making it the optimum content for improving strength parameters. Moreover, the post cracking strength of concrete after CNTs addition was found to be more than the conventional concrete with the reduction in the abrasion of the concrete.