Enhancing fresh properties and strength of concrete with a pre-dispersed carbon nanotube liquid admixture

MacLeod, Alastair; Fehérvári, András; Gates, Will P.; Garcez, Estela Oliari; Aldridge, Laurie; Collins, Francis Gerard

doi:10.1016/j.conbuildmat.2020.118524

Cited by 39 publications

(12 citation statements)

References 37 publications

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“…Many studies have shown that CNTs can be uniformly dispersed in concrete using a certain dispersion method, and the compressive strengths of concrete with CNT can be remarkably enhanced. However, the performance of concrete will deteriorate when the content is excessively high [99][100][101][102][103]. e findings of Jung et al are shown in Figure 19.…”

Section: Influence Of Cnton the Mechanical Properties Of Concretementioning

confidence: 99%

A Critical Review on Effect of Nanomaterials on Workability and Mechanical Properties of High‐Performance Concrete

Zhang

Wang

Wei

et al. 2021

Advances in Civil Engineering

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The application of nanomaterials in high-performance concrete (HPC) has been extensively studied worldwide due to their large surface areas, small particle sizes, filling effects, and macroquantum tunneling effects. The addition of nanomaterials in HPC has great contribution to enhancing the pore size of the cementitious matrix, improving the hydration of cement, and making the matrix much denser. In order to present an exhaustive insight into the feasibility of HPC reinforced with nanomaterials, the new development of HPC was summarized and the influence of different nanomaterials on the properties of HPC was reviewed based on more than 100 recent studies in this literature review. Workability, compressive strength, tensile strength, and flexural strength properties of HPC with nanomaterials were discussed in detail. In addition, nanomaterial-modified HPC was compared with the traditional concrete and obtained a lot of valuable results. The results in the present review indicate that the addition of various nanomaterials improves the mechanical properties of HPC, while reducing the workability of HPC. However, there is an optimal dosage of nanomaterial for improving the mechanical properties of HPC. Improving the properties of HPC by adding nanomaterials is expected to become a mainstream technique in the future. This literature review can provide comprehensive and systematic knowledge to researchers and engineers working on HPC and promote the application of this new HPC in modern civil engineering.

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Section: Influence Of Cnton the Mechanical Properties Of Concretementioning

confidence: 99%

A Critical Review on Effect of Nanomaterials on Workability and Mechanical Properties of High‐Performance Concrete

Zhang

Wang

Wei

et al. 2021

Advances in Civil Engineering

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“…Particularly, this issue can be present in the production of SCC. The usage of nanoparticles, with their high surface area, can allow controlling of the bleeding of plasticised concrete mixtures [50].…”

Section: Introductionmentioning

confidence: 99%

Rheological Properties and Flow Behaviour of Cement-Based Materials Modified by Carbon Nanotubes and Plasticising Admixtures

Skripkiūnas

Karpova

Bendoraitienė

et al. 2020

Fluids

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In this study, the rheological properties of cement paste modified by a suspension containing both multi-walled carbon nanotubes (MWCNT) and carboxymethyl cellulose (CMC) (MWCNT/CMC suspension) with different types of plasticising admixtures (Pl), such as lignosulphonate (LS), sulfonated naphthalene formaldehyde condensate (NF), and polycarboxylate ether (PCE) were evaluated. The increase in yield stress and plastic viscosity up to 20% was established in the case of the modification of cement-based mixtures by MWCNT in the dosage up to 0.24% by weight of cement (bwoc) without Pl and with LS and NF. The complex modification of cement paste by MWCNT and PCE increases the yield stress and plastic viscosity from the MWCNT dosage of 0.06% and 0.015% bwoc, respectively. The yield stress and plastic viscosity of cement paste with PCE enhanced by 265% and 107%, respectively, in a MWCNT dosage of 0.12% bwoc. MWCNT do not have a significant influence on the flow behaviour index of cement paste; however, in the case of usage of PCE, the shear thickening effect decreased from a MWCNT dosage of 0.03% bwoc. The significant reduction in the volume coefficient of water bleeding by 99, 100, and 83% was obtained with LS, NF, and PCE, respectively, with an increase in MWCNT dosage up to 0.24% bwoc.

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“…Mostly studied literature 10 , 38 , 40 , 41 illustrates that the incorporation of CNTs reduced the flowability of cementitious composites. While there are several studies that indicate the increase in flowability of CNT incorporated cementitious composites 36 , 39 , 42 . Besides, the incorporation of silica aerogel also reduces the flowability of cementitious composites 20 .…”

Section: Resultsmentioning

confidence: 99%

Effects of carbon nanotubes on expanded glass and silica aerogel based lightweight concrete

Adhikary

Rudžionis

Tučkutė

et al. 2021

Sci Rep

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This study is aimed to investigate the effect of carbon nanotubes on the properties of lightweight aggregate concrete containing expanded glass and silica aerogel. Combinations of expanded glass (55%) and hydrophobic silica aerogel particles (45%) were used as lightweight aggregates. Carbon nanotubes were sonicated in the water with polycarboxylate superplasticizer by ultrasonication energy for 3 min. Study results show that incorporating multi-wall carbon nanotubes significantly influences the compressive strength and microstructural performance of aerogel based lightweight concrete. The addition of carbon nanotubes gained almost 41% improvement in compressive strength. SEM image of lightweight concrete shows a homogeneous dispersal of carbon nanotubes within the concrete structure. SEM image of the composite shows presence of C–S–H gel surrounding the carbon nanotubes, which confirms the cites of nanotubes for the higher growth of C–S–H gel. Besides, agglomeration of carbon nanotubes and the presence of ettringites was observed in the transition zone between the silica aerogel and cementitious materials. Additionally, flowability, water absorption, microscopy, X-ray powder diffraction, and semi-adiabatic calorimetry results were analyzed in this study.

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Enhancing fresh properties and strength of concrete with a pre-dispersed carbon nanotube liquid admixture

Cited by 39 publications

References 37 publications

A Critical Review on Effect of Nanomaterials on Workability and Mechanical Properties of High‐Performance Concrete

A Critical Review on Effect of Nanomaterials on Workability and Mechanical Properties of High‐Performance Concrete

Rheological Properties and Flow Behaviour of Cement-Based Materials Modified by Carbon Nanotubes and Plasticising Admixtures

Effects of carbon nanotubes on expanded glass and silica aerogel based lightweight concrete

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