Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review

Horszczaruk, Elżbieta

doi:10.3390/ma12020326

Cited by 32 publications

(21 citation statements)

References 105 publications

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“…The noted increase of compressive strength was also related to the dispersion of carbon nanotubes in the mixtures [11]. When the dispersion was performed well, the carbon nanotubes were homogenously diluted in the cement paste by making interconnections with the hydrated calcium silicate and the grains of the mixture, with no agglomeration.…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of Carbon Nanotube Incorporation in Cementitious Composite Materials

et al. 2019

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Over the last decades, new materials with outstanding performance have been introduced in the construction industry. Considering these new technologies, it is worth mentioning that nanotechnology has revolutionized various areas of engineering. In the area of civil engineering and construction, cement is used for various purposes and the search to improve its performance has been receiving growing interest within the scientific community. The objective of this research was to evaluate the behavior of cement mortar produced by the addition of multi-walled carbon nanotubes (MWCNTs) in different concentrations by comparing their physical and mechanical properties with the properties of the nanotube-free composite. Motivated by the lack of consensus in the literature concerning to the optimal dosage of CNTs in cementitious matrices, three different carbon nanotube ratios, 0.20, 0.40 and 0.60 wt % Portland cement, were investigated with the aim of evaluating the mechanical properties. Destructive tests were carried out to determine the compressive strength, flexural strength and split tensile strength. Additionally, a non-destructive test was performed to determine the dynamic elastic modulus and density. Scanning electron microscopy (SEM) images showed the interaction between the MWCNTs and the hydration products of Portland cement mortar. The results indicated the potential contribution of 0.40 wt % cement CNTs to the enhancement of the mechanical properties of the cement composite as a promising construction material.

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Section: Resultsmentioning

confidence: 99%

“…The nanotubes modify the molecular structure of the cementitious materials, leading to improved physical and mechanical properties. These nanotubes directly influence the mechanical performance, volumetric stability, durability and sustainability of the concrete structure [10,11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Carbon Nanotube Incorporation in Cementitious Composite Materials

et al. 2019

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“…Application of nano-particles to the cement composites can cause nanomaterial agglomeration inside the cement matrix, which is the key problem related to the practical use of nano-particles in cement composites and has been discussed widely [33,34,35]. For the nano-particles used in this study, 15 nm-NS is hydrophobic and 30 nm-NS/NT is hydrophilic.…”

Section: Specimen Preparationmentioning

confidence: 99%

The Effects of Nano-SiO2 and Nano-TiO2 Addition on the Durability and Deterioration of Concrete Subject to Freezing and Thawing Cycles

et al. 2019

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The objective of this manuscript is to study the effects of nano-particle addition on the durability and internal deterioration of concrete subject to freezing and thawing cycles (FTCs). Fifteen nm of SiO2, 30 nm of SiO2, and 30 nm of TiO2 were added to concrete to prepare specimens with different contents. All the specimens were subjected to FTCs from 0 to 75. The mass of each specimen was measured once the FTCs reached 25, 50, and 75. Then the freezing and thawing resistance of the concrete was evaluated by computing the mass loss ratio. The pore fluid size distribution of the concrete was detected using nuclear magnetic resonance (NMR). The deterioration of the concrete subjected to FTCs was detected by industrial computed tomography (CT). The effect of different nano-particle sizes, different contents of nano-particles, and different types of nano-particles on the freezing and thawing resistance, the pore size, distribution, and the deterioration of the concrete were analyzed. The effects of FTCs on the pore size distribution and the internal deterioration of concrete were also studied. Compared to 30 nm-Nono-SiO2 (NS), 15 nm-NS had a better effect in improving the internal structure for concrete, and 30 nm-Nano-TiO2 (NT) also had a better effect in preventing pore and crack expansion.

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“…These nano-particles, together with silver nano-particles, carbon nano-tubes, and nano-fibers, are typically used for the production of commercially available building products containing nano-objects [25]. To date, numerous types of nano-particles have been applied to improve the properties of concrete, including nano-metakaolin [6], nano-fly ash [26], nano-limestone [27], nano-TiO 2 [28], nano-Fe 3 O 4 [29], nano-Al 2 O 3 [23], nano-CaCO 3 [30], and nano-SiO 2 [31].…”

Section: Introductionmentioning

confidence: 99%

Durability of Steel Fiber-Reinforced Concrete Containing SiO2 Nano-Particles

Zhang

Chen

et al. 2019

Materials

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An experimental study was conducted to investigate the effect ofnano-SiO2 and steel fiber content on the durability of concrete. Five different dosages of nano-SiO2 particles and five volume dosages of steel fiber were used. The durability of concretes includes permeability resistance, cracking resistance, carbonation resistance, and freezing-thawing resistance, and these were evaluated by the water permeation depth, number of cracks, total cracking area per unit area of the specimens, carbonation depth of the specimens, and the relative dynamic elastic modulus of the specimens after freezing-thawing cycles, respectively. The results indicate that the addition of nano-SiO2 particles significantly improves the durability of concrete when the content of nano-SiO2 is limited within a certain range. With the increase of nano-SiO2 content, the durability of concrete first increases and then decreases. An excessive number of nano-SiO2 particles could have an adverse effect on the durability of the concrete. The addition of the correct amount of steel fibers improves the carbonation resistance of concrete containing nano-particles, but excessive steel fiber reduces the carbonation resistance. Moreover, the addition of steel fibers reduces the permeability resistance of concrete containing nano-particles. The incorporation of steel fiber enhanced the freezing-thawing resistance and cracking resistance of concrete containing nano-particles. With increasing steel fiber content, the freezing-thawing resistance of the concrete containing nano-particles increases, and the cracking resistance of the concrete decreases gradually.

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Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review

Cited by 32 publications

References 105 publications

Evaluation of Carbon Nanotube Incorporation in Cementitious Composite Materials

Evaluation of Carbon Nanotube Incorporation in Cementitious Composite Materials

The Effects of Nano-SiO2 and Nano-TiO2 Addition on the Durability and Deterioration of Concrete Subject to Freezing and Thawing Cycles

Durability of Steel Fiber-Reinforced Concrete Containing SiO2 Nano-Particles

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