Experimental Investigation of Hybrid Carbon Nanotubes and Graphite Nanoplatelets on Rheology, Shrinkage, Mechanical, and Microstructure of SCCM

Farooq, Furqan; Akbar, Arslan; Khushnood, Rao Arsalan; Muhammad, W; Rehman, Sardar Kashif Ur; Javed, Muhammad Faisal

doi:10.3390/ma13010230

Cited by 72 publications

(41 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be explained by the capacity of load carrying between CNMs and the adjacent cementitious matrix. Besides, GNPs can facilitate the CNTs dispersion which leads to an increase in overall strength [38]. Additionally, in nano intruded cementitious composite, crack propagation is stopped by various types of inclusions: pores, grains, fibers, aggregates, and particles [39].…”

Section: Mechanical and Microstructural Cementitious Composite Characmentioning

confidence: 99%

Ultra-Sensitive Affordable Cementitious Composite with High Mechanical and Microstructural Performances by Hybrid CNT/GNP

2020

View full text Add to dashboard Cite

In this paper a hybrid combination of carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) was used for developing cementitious self-sensing composite with high mechanical, microstructural and durability performances. The mixture of these two nanoparticles with different 1D and 2D geometrical shapes can reduce the percolation threshold to a certain amount which can avoid agglomeration formation and also reinforce the microstructure due to percolation and electron quantum tunneling amplification. In this route, different concentrations of CNT + GNP were dispersed by Pluronic F-127 and tributyl phosphate (TBP) with 3 h sonication at 40 °C and incorporated into the cementitious mortar. Mechanical, microstructural, and durability of the reinforced mortar were investigated by various tests in different hydration periods (7, 28, and 90 days). Additionally, the piezoresistivity behavior of specimens was also evaluated by the four-probe method under flexural and compression cyclic loading. Results demonstrated that hybrid CNT + GNP can significantly improve mechanical and microstructural properties of cementitious composite by filler function, bridging cracks, and increasing hydration rate mechanisms. CNT + GNP intruded specimens also showed higher resistance against climatic cycle tests. Generally, the trend of all results demonstrates an optimal concentration of CNT (0.25%) + GNP (0.25%). Furthermore, increasing CNT + GNP concentration leads to sharp changes in electrical resistivity of reinforced specimens under small variation of strain achieving high gauge factor in both flexural and compression loading modes.

show abstract

Section: Mechanical and Microstructural Cementitious Composite Characmentioning

confidence: 99%

Ultra-Sensitive Affordable Cementitious Composite with High Mechanical and Microstructural Performances by Hybrid CNT/GNP

2020

View full text Add to dashboard Cite

show abstract

“…Detailed descriptions were discussed in 3.5 paragraphs. Besides, literature studies con rm that conforms incorporation of nanoparticles improves the microstructure and provide a denser concrete structure [26]. A decrease in water absorption of the CNT-LWAC con rms the denser structure of CNT-LWAC.…”

Section: Strength Of Cnt-lwacmentioning

confidence: 75%

Effects of Carbon Nanotubes on the Properties of Lightweight Concrete Prepared With Expanded Glass and Hydrophobic Silica Aerogel

Adhikary¹,

Rudžionis²,

Tučkutė³

2020

Preprint

View full text Add to dashboard Cite

This study aimed to study the effect of carbon nanotubes on the properties of expanded glass and silica aerogel based lightweight aggregate concrete. CNTs were dispersed in the polycarboxylate superplasticizer added water by ultrasonication energy for 3 minutes. Combinations of expanded glass (55%) and hydrophobic silica aerogel particles (45%) were used as lightweight aggregates. Study results show that the incorporation of MWCNTs significantly influences the mechanical and microstructural performance of aerogel based lightweight concrete. Almost 41% improvement in compressive strength was gained by the addition of carbon nanotubes. SEM image of lightweight concrete shows CNTs were almost dispersed homogeneously within the concrete structure. SEM image of the composite also shows the presence of the C-S-H structure surrounding the CNTs, that confirms the cites of nanotubes for higher growth of C-S-H. Besides, agglomeration of CNTs and the presence of Ettringites observed in the transition zone between the silica aerogel and cementitious materials. Moreover, flowability, water absorption, microscopy, XRD, and semi-adiabatic calorimetry results were analyzed in this study.

show abstract

“…Furthermore, the use of dispersant, surface modification, reduction in size and thickness of graphene has been employed to improve the performance of GNDs on mechanical properties of cement-based materials [ 138 , 139 , 140 ]. It is understood that the key factors controlling the porosity and the mechanical properties of cement-based materials are the availability of more hydrated cement products, filling of pores and bonding between hydrated cement products and nanomaterial [ 138 , 141 , 142 ]. Nevertheless, the tremendous increment in the mechanical properties has been recorded, yet the role of graphene nanomaterial is still unclear in the literature.…”

Section: Mechanical Properties Of Graphene Cement Compositementioning

confidence: 99%

A Review of Microscale, Rheological, Mechanical, Thermoelectrical and Piezoresistive Properties of Graphene Based Cement Composite

et al. 2020

Self Cite

View full text Add to dashboard Cite

Extensive research on functionalized graphene, graphene oxide, and carbon nanotube based cement composites has been carried out to strengthen and overcome the shortcomings of construction materials. However, less literature is available on the pure graphene based cement composite. In this review paper, an in-depth study on a graphene-based cement composite was performed. Various structural forms of graphene and classifications of graphene-based nanomaterial have been presented. The dispersion mechanism and techniques, which are important for effective utilization in the construction industry, are reviewed critically. Micro-scale characterization of carbon-based cement composite using thermogravimetric analysis (TGA), infrared (IR) spectroscopic analysis, x-ray diffractometric (XRD) analysis, and morphological analysis has also been reviewed. As per the authors’ knowledge, for the first time, a review of flow, energy harvesting, thermoelectrical, and self-sensing properties of graphene and its derivatives as the bases of cement composite are presented. The self-sensing properties of the composite material are reported by exploring physical applications by reinforcing graphene nanoplatelets (GNPs) into concrete beams.

show abstract

Experimental Investigation of Hybrid Carbon Nanotubes and Graphite Nanoplatelets on Rheology, Shrinkage, Mechanical, and Microstructure of SCCM

Cited by 72 publications

References 34 publications

Ultra-Sensitive Affordable Cementitious Composite with High Mechanical and Microstructural Performances by Hybrid CNT/GNP

Ultra-Sensitive Affordable Cementitious Composite with High Mechanical and Microstructural Performances by Hybrid CNT/GNP

Effects of Carbon Nanotubes on the Properties of Lightweight Concrete Prepared With Expanded Glass and Hydrophobic Silica Aerogel

A Review of Microscale, Rheological, Mechanical, Thermoelectrical and Piezoresistive Properties of Graphene Based Cement Composite

Contact Info

Product

Resources

About