Effects of Graphene Oxide On Early-age Hydration And Electrical Resistivity Of Portland Cement Paste
Wengui Li,Wengui Li,Xiangyu Li,Xiangyu Li,Shu Jian Chen,Yan Ming Liu,Wenhui Duan,Surendra P. Shah +7 more
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TLDR
In this article, the effects of graphene oxide (GO) on the early-age hydration process and mechanical properties of Portland cement paste were experimentally investigated in a study based on an isothermal calorimeter measurement, the hydration rate of cement was observed to increase with the increase of GO content by nucleation effect.About:
This article is published in Construction and Building Materials.The article was published on 2017-04-01 and is currently open access. It has received 208 citations till now. The article focuses on the topics: Portland cement & Cement.read more
Citations
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A critical review on research progress of graphene/cement based composites
TL;DR: A critical review on recent research findings about GND modified cement-based materials was conducted in this paper, where the influence of GND on properties of cement matrix including microstructure, hydration, mechanical properties, etc.
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Graphene-based nanosheets for stronger and more durable concrete: A review
Ezzatollah Shamsaei,Felipe Basquiroto de Souza,Xupei Yao,Emad Benhelal,Abozar Akbari,Wenhui Duan +5 more
TL;DR: Graphene and graphene-based nanosheets (GNS) possess extraordinary mechanical, chemical, thermal and electrical properties, enabling attractive applications, ranging from structural strength/durability improvement, anti-corrosion, to self-cleaning surfaces and energy saving.
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Piezoresistive properties of cement-based sensors: Review and perspective
TL;DR: In this article, the fundamental concepts, key components, manufacturing process, piezoresistivity measurements, and primary applications of cement-based sensors are reviewed in smart concrete to self-sense and monitor the damages and cracks through the measurements of concrete electrical resistivity.
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Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide
TL;DR: In this paper, the research progress of graphene-based nanomaterials in improving the properties of cement-based materials and geopolymer materials, and points out the main challenges and development prospects of such materials in the construction field in the future.
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Investigation on dispersion of graphene oxide in cement composite using different surfactant treatments
TL;DR: In this paper, the dispersion of GO in water, alkali and several ionic species is investigated with the aid of UV-vis spectroscopy, showing that the amount of 0.03% GO by weight of cement can increase the flexural strength of GO-cement composite up to 67%.
References
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Mechanical properties and microstructure of a graphene oxide-cement composite
Zhu Pan,Li He,Ling Qiu,Asghar Habibnejad Korayem,Gang Li,Jun Wu Zhu,Frank Collins,Dan Li,Wenhui Duan,Ming Chien Wang,Ming Chien Wang +10 more
TL;DR: Graphene oxide (GO) is the product of chemical exfoliation of graphite and is a potential candidate for use as nanoreinforcements in cement-based materials as discussed by the authors.
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Aqueous Liquid Crystals of Graphene Oxide
TL;DR: It is discovered that well-soluble and single-layered graphene oxide (GO) sheets can exhibit nematic liquid crystallinity in water and first established their isotropic-nematic solid phase diagram versus mass fraction and salt concentration.
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Conductivity of carbon fiber reinforced cement-based composites
Bing Chen,Keru Wu,Wu Yao +2 more
TL;DR: In this article, the authors presented the conductive behavior of carbon fiber cement-based composites and the relationship between conductivity and volume fraction of carbon fibre indicated that the statistical percolation theory is suitable and applicable for the change rule of conductivity of system with the volume of the carbon fiber.
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Growth of Cement Hydration Products on Single-Walled Carbon Nanotubes
Jonathan M. Makar,Gordon Chan +1 more
Abstract: Single-walled carbon nanotubes (SWCNT) were distributed on the surface of ordinary Portland cement (OPC) grains. The OPC/SWCNT composite was then hydrated at a 0.5 w/c ratio. The effects of the SWCNT on the early hydration process were studied using isothermal conduction calorimetry, high-resolution scanning electron microscopy and thermogravimetric analysis. The observed behavior of the composite samples was compared with both OPC sonicated without SWCNT and previously published data on as-delivered OPC. The SWCNT were found to accelerate the hydration reaction of the C 3 S in the OPC. The morphology of both the initial C 3 A and the C 3 S hydration products were found to be affected by the presence of the SWCNT. In particular, the nanotubes appeared to act as nucleating sites for the C 3 S hydration products, with the nanotubes becoming rapidly coated with C―S―H. The resulting structures remained on the surface of the cement grains while those in the sonicated and as-delivered OPC samples grew out from the grain surfaces to form typical C-S-H clusters. Classical evidence of reinforcing behavior, in the form of fiber pullout of the SWCNT bundles, was observed by 24 h of hydration.
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Ultraviolet-visible spectroscopy of graphene oxides
TL;DR: In this article, a modified Hummers method with different mass ratios of KMnO4 to graphite was used for the removal of few-layer (1-3 layers), multi-layer and thick-layer (>10 layers) graphene oxide (GO) dispersions.