The synergic influence of carbon nanotube and nanosilica on the compressive strength of lightweight concrete

Narasimman, Kaarthika; Jassam, Taha M.; Velayutham, Thamil Selvi; Yaseer, M.M.M.; Ruzaimah, R.

doi:10.1016/j.jobe.2020.101719

Cited by 11 publications

(9 citation statements)

References 23 publications

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“…Table 2 presents the different functions of nanomaterials when added to concrete [109][110][111][112][113][114][115][116][117]. It is evident that it could improve the mechanical properties and overcome physical and chemical deteriorations.…”

Section: Other Nanomaterialsmentioning

confidence: 99%

“…Nanomaterials improved the compressive strength [117] As we can note, although nanomaterials offer superior properties to concrete, the majority are not used as much commercially, due to their limited availability, along with the increased price of the nanomaterials. However, global commercial interest in CNTs is reflected in their manufacturing capacity, which currently is more than several thousand tons/year [118].…”

Section: Improvement Of Mechanical Propertiesmentioning

confidence: 99%

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Recent Advancements in the Nanomaterial Application in Concrete and Its Ecological Impact

2021

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At present, nanotechnology is a significant research area in different countries, owing to its immense ability along with its economic impact. Nanotechnology is the scientific study, development, manufacturing, and processing of structures and materials on a nanoscale level. It has tremendous application in different industries such as construction. This study discusses the various progressive uses of nanomaterials in concrete, as well as their related health risks and environmental impacts. Nanomaterials such as nanosilica, nano-TiO2, carbon nanotubes (CNTs), ferric oxides, polycarboxylates, and nanocellulose have the capability to increase the durability of buildings by improving their mechanical and thermal properties. This could cause an indirect reduction in energy usage and total expenses in the concrete industry. However, due to the uncertainties and irregularities in size, shape, and chemical compositions, some nanosized materials might have harmful effects on the environment and human health. Acknowledgement of the possible beneficial impacts and inadvertent dangers of these nanosized materials to the environment will be extremely important when pursuing progress in the upcoming years. This research paper is expected to bring proper attention to the probable effects of construction waste, together with the importance of proper regulations, on the final disposal of the construction waste.

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Section: Other Nanomaterialsmentioning

confidence: 99%

Section: Improvement Of Mechanical Propertiesmentioning

confidence: 99%

Recent Advancements in the Nanomaterial Application in Concrete and Its Ecological Impact

2021

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“…Some nanoparticles can provide nucleation sites owing to their super fineness, thus accelerating the precipitation and formation of C-S-H gel. Owing to the high efficiency of nanomaterials in improving the mechanical properties of cementitious materials, the applications of nanoparticles were broadened to include ultra-high performance concrete [ 13 ], self-compacted concrete [ 19 ], reactive powder concrete [ 20 ], heavyweight concrete [ 21 ], marine concrete [ 22 ], shotcrete [ 23 ], green concrete [ 24 ], recycled aggregate concrete [ 25 ], lightweight concrete [ 26 ], high-volume fly ash concrete [ 27 ], carbon fibre-reinforced concrete [ 28 ], and foam concrete [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

An Elucidative Review of the Nanomaterial Effect on the Durability and Calcium-Silicate-Hydrate (C-S-H) Gel Development of Concrete

Al-saffar,

Wong,

Paul

2023

Gels

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Concrete as a building material is susceptible to degradation by environmental threats such as thermal diffusion, acid and sulphate infiltration, and chloride penetration. Hence, the inclusion of nanomaterials in concrete has a positive effect in terms of promoting its mechanical strength and durability performance, as well as resulting in energy savings due to reduced cement consumption in concrete production. This review article discussed the novel advances in research regarding C-S-H gel promotion and concrete durability improvement using nanomaterials. Basically, this review deals with topics relevant to the influence of nanomaterials on concrete’s resistance to heat, acid, sulphate, chlorides, and wear deterioration, as well as the impact on concrete microstructure and chemical bonding. The significance of this review is a critical discussion on the cementation mechanism of nanoparticles in enhancing durability properties owing to their nanofiller effect, pozzolanic reactivity, and nucleation effect. The utilization of nanoparticles enhanced the hydrolysis of cement, leading to a rise in the production of C-S-H gel. Consequently, this improvement in concrete microstructure led to a reduction in the number of capillary pores and pore connectivity, thereby improving the concrete’s water resistance. Microstructural and chemical evidence obtained using SEM and XRD indicated that nanomaterials facilitated the formation of cement gel either by reacting pozzolanically with portlandite to generate more C-S-H gel or by functioning as nucleation sites. Due to an increased rate of C-S-H gel formation, concrete enhanced with nanoparticles exhibited greater durability against heat damage, external attack by acids and sulphates, chloride diffusion, and surface abrasion. The durability improvement following nanomaterial incorporation into concrete can be summarised as enhanced residual mechanical strength, reduced concrete mass loss, reduced diffusion coefficients for thermal and chloride, improved performance against sulphates and acid attack, and increased surface resistance to abrasion.

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“…On the other hand, excessive use of MWCNT and NS in the cement paste could reduce the thermal capacity due to the nanomaterial’s agglomeration. Narasimman et al [ 52 ] studied the effects of incorporating combined CNT and NS materials on the lightweight concrete’s compressive strength. CNT and NS as nano reinforcement fillers were used along with expanded clay to improve the compressive strength by applying the ultrasonication method.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characteristics of Cement Paste in the Presence of Carbon Nanotubes and Silica Oxide Nanoparticles: An Experimental Study

et al. 2021

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Considering the remarkable characteristics of nanomaterials, previous research studies investigated the effects of incorporating different types of these materials on improving the concrete properties. However, further studies are required to evaluate the complementary hybridization and synergistic influence of nanomaterials. In this research, the combined effect of adding nano silica particles (NS) and multi-walled carbon nanotubes (MWCNT) on enhancing both the compressive and flexural strengths of the cement paste was investigated. Moreover, the morphology of the interface between cement paste and aggregates was studied by scanning electron microscopy (SEM). The mixtures were prepared using three different portions of MWCNT and NS. Electron microscopy images indicated a uniform distribution of nanoparticles in the cement matrix, enhanced hydration reactions, and increased density. Based on the experiments’ outcomes, the combined utilization of silica and carbon nanomaterials in the cement paste did not necessarily result in the maximum compressive and flexural strengths. Furthermore, it was observed that the use of higher percentages of pristine NS in the absence of MWCNT can lead to further enhancement of strength properties of the cement paste.

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The synergic influence of carbon nanotube and nanosilica on the compressive strength of lightweight concrete

Cited by 11 publications

References 23 publications

Recent Advancements in the Nanomaterial Application in Concrete and Its Ecological Impact

Recent Advancements in the Nanomaterial Application in Concrete and Its Ecological Impact

An Elucidative Review of the Nanomaterial Effect on the Durability and Calcium-Silicate-Hydrate (C-S-H) Gel Development of Concrete

Mechanical Characteristics of Cement Paste in the Presence of Carbon Nanotubes and Silica Oxide Nanoparticles: An Experimental Study

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