A Comparative Study on the Effects of Three Nano-Materials on the Properties of Cement-Based Composites

Fu, Chao; Xie, Chunyan; Liu, Jing; Wei, Xiuli; Wu, Dake

doi:10.3390/ma13040857

Cited by 23 publications

(8 citation statements)

References 19 publications

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“…The effect of pcm ratio and pcm type on the compressive strength of concrete (Aguayo et al 2016) In the study conducted by Fu et al, 3 different nano PCM types were added to cement based materials and 7day and 28-day compressive strength was measured. Accordingly, it is seen that the optimum pcm ratio in the mixture is between 0.1% and 2% at the point where the compressive strengths are the highest compared to the control sample according to the added PCM type (Fu et al 2020).…”

Section: Methods Of Pcmmentioning

confidence: 94%

A LITERATURE REVIEW ABOUT EFFECTS of PHASE CHANGING MATERIALS on COMPRESSIVE STRENGTH and THERMAL CONDUCTIVITY of BUILDING COMPONENTS

Çelik

Kayabaşi

ŞENER

2022

Mühendislik Bilimleri Ve Tasarım Dergisi

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One of the important areas of Phase Changing Materials (PCM) is to increase the heat retention capacity of building components. Researches are carried out on the heat retention capacities of PCMs to store energy in building components and to ensure building temperature control. The use of PCM in building components has become an important tool for energy saving, since ensuring building temperature control in summer and winter conditions is a situation that requires continuity. This feature provided to the building component provides an improvement in the energy identity of the building. In general researches, the use of macro, micro encapsulated PCM decreases the heat conduction coefficient as it increases the heat retention capacity of the building components, but effects compressive strength positive or negative. However, when the capsule size used in micro capsule applications is reduced to 7 microns and below, it is seen that the strength increases, while the thermal conductivity coefficient continues to decrease. When the PCM capsule particle sizes used in the building components are reduced, it provides an improvement in the granulometry of the component, so a positive effect on strength is seen in the building components. As a result of this research, differences in compressive strength were observed depending on the macro, micro and nano dimensions and mixing ratios of the pcm addition. However, due to the continuous increase in the PCM ratio of the building component, the heat holding capacity of the building component increases and its thermal conductivity decreases.

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Section: Methods Of Pcmmentioning

confidence: 94%

A LITERATURE REVIEW ABOUT EFFECTS of PHASE CHANGING MATERIALS on COMPRESSIVE STRENGTH and THERMAL CONDUCTIVITY of BUILDING COMPONENTS

Çelik

Kayabaşi

ŞENER

2022

Mühendislik Bilimleri Ve Tasarım Dergisi

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“…The results are shown in Fig. (5). Due to mechanical pressure and other reasons in the specimen preparation process, there is a gap in the micro-morphology of the ordinary cement matrix (M1).…”

Section: Sem Characterization and Eds Analysismentioning

confidence: 99%

Improvement of Flexural and Compressive Strength of Cement Mortar by Graphene Nanoplatelets

Chen¹,

Li²,

Li³

et al. 2021

TOCIEJ

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Background: In order to provide space for improving the durability of engineering structures by enhancing strength, the addition of nanomaterials has become a research trend in recent years. Graphene and its derivatives have unique properties and have been used in certain fields, which has also stimulated continuous and in-depth research on whether it can improve structural strength. Objective: This paper investigates the mechanical properties and mechanism of cement-based materials reinforced by Graphene Nanoplatelets (GNPs). Methods: Macroscopically, the flexural strength and compressive strengths of cement mortar were tested. Microscopically, the structure and composition were characterized and analyzed by SEM, EDS, and XRD. Results: The results show that the mechanical properties of modified cement mortar are directly related to the GNPs content. When the GNPs content is 0.04wt%, the flexural and compressive strength can still be increased by 12.8% and 33.9% after 28 d. Furthermore, the appropriate content of GNPs dispersed in the cement matrix played a role in promoting cement hydration. The interconnection with hydration products further reduces cracks and pores so that the cement composites form a denser microstructure. Conclusion: The results obtained above would provide references for understanding the reinforcement mechanism of GNPs.

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“…When the volume fraction of cut virgin carbon fibers, recycled carbon fibers, and brass-plated steel fibers exceeded 0.8% in the cement matrix, fibers would form an effective conductive network, thus increasing the electrical contact bridges [29]. Conductive polymers are also commonly used in cementbased materials to increase their electrical conductivity [33][34][35][36]. Among them, conductive polyaniline is the most widely used due to its easy availability, stable chemical properties, and high conductivity [37].…”

Section: Introductionmentioning

confidence: 99%

Cement-Based Thermoelectric Device for Protection of Carbon Steel in Alkaline Chloride Solution

Liao

Zhang

et al. 2022

Materials

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The thermoelectric cement-based materials can convert heat into electricity; this makes them promising candidates for impressed current cathodic protection of carbon steel. However, attempts to use the thermoelectric cement-based materials for energy conversion usually results in low conversion efficiency, because of the low electrical conductivity and Seebeck coefficient. Herein, we deposited polyaniline on the surface of MnO2 and fabricated a cement-based thermoelectric device with added PANI/MnO2 composite for the protection of carbon steel in alkaline chloride solution. The nanorod structure (70~80 nm in diameter) and evenly dispersed conductive PANI provide the PANI/MnO2 composite with good electrical conductivity (1.9 ± 0.03 S/cm) and Seebeck coefficient (−7.71 × 103 ± 50 μV/K) and, thereby, increase the Seebeck coefficient of cement-based materials to −2.02 × 103 ± 40 μV/K and the electrical conductivity of cement-based materials to 0.015 ± 0.0003 S/cm. Based on this, the corrosion of the carbon steel was delayed after cathodic protection, which was demonstrated by the electrochemical experiment results, such as the increased resistance of the carbon steel surface from 5.16 × 102 Ω·cm2 to 5.14 × 104 Ω·cm2, increased charge transfer resistance from 11.4 kΩ·cm2 to 1.98 × 106 kΩ·cm2, and the decreased corrosion current density from 1.67 μA/cm2 to 0.32 μA/cm2, underlining the role of anti-corrosion of the PANI/MnO2 composite in the cathodic protection system.

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A Comparative Study on the Effects of Three Nano-Materials on the Properties of Cement-Based Composites

Cited by 23 publications

References 19 publications

A LITERATURE REVIEW ABOUT EFFECTS of PHASE CHANGING MATERIALS on COMPRESSIVE STRENGTH and THERMAL CONDUCTIVITY of BUILDING COMPONENTS

A LITERATURE REVIEW ABOUT EFFECTS of PHASE CHANGING MATERIALS on COMPRESSIVE STRENGTH and THERMAL CONDUCTIVITY of BUILDING COMPONENTS

Improvement of Flexural and Compressive Strength of Cement Mortar by Graphene Nanoplatelets

Cement-Based Thermoelectric Device for Protection of Carbon Steel in Alkaline Chloride Solution

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