Journal ArticleDOI
Evaluation of pore structures and cracking in cement paste exposed to elevated temperatures by X-ray computed tomography
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TLDR
In this paper, a series of increasing temperatures was used to explore the temperature-dependent evolution of internal pore structure and fracture networks in a cement-based material by fire, based on visual observations of the 3D internal structures revealed by X-ray CT.About:
This article is published in Cement and Concrete Research.The article was published on 2013-08-01. It has received 127 citations till now.read more
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Effect of graphene oxide nanosheets of microstructure and mechanical properties of cement composites
TL;DR: Graphene oxides (GOs) nanosheets were prepared by oxidization and ultrasonic dispersion to increase the tensile/flexural strength of the corresponding cement composites as discussed by the authors.
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A review of X-ray computed tomography of concrete and asphalt construction materials
TL;DR: This review summarises the successful applications of this technique to concrete and asphalt materials to date and provides insight into the current capabilities and state of the art of non-destructive X-ray micro computed tomography.
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Investigation of the effectiveness of PC@GO on the reinforcement for cement composites
TL;DR: In this article, the authors evaluated the reinforcement of GO on the mechanical properties and microstructure of cement composites and found that small quantities of GO as little as 0.022% can increase compressive strength and flexural strength by as much as ∼27% and ∼26%, respectively.
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Multiscale X-ray tomography of cementitious materials: A review
TL;DR: X-ray computed tomography (CT) is a non-destructive technique that offers a 3D insight into the microstructure of thick (opaque) samples with virtually no preliminary sample preparation as mentioned in this paper.
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Simple and fast porosity analysis of concrete using X-ray computed tomography
TL;DR: In this article, a simplified procedure is presented and demonstrated using results obtained from basic procedures with commercial software packages, with minimal image processing, and the same sample was subjected to scans ranging from 100 to 5 μm resolutions, demonstrating the multiscale ability of commercial CT scanners.
References
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Book
Properties of concrete
TL;DR: In this article, the authors present the following properties of concrete: Elasticity, Shrinkage and Creep, Durabilty of Concrete, Freezing and Thawing, and Chlorides.
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Changes in portlandite morphology with solvent composition: Atomistic simulations and experiment
TL;DR: In this article, a new analysis tool was developed to quantify the experimentally observed changes in morphology of portlandite, allowing the calculation of the relative surface energies of the crystal facets.
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The use of thermal analysis in assessing the effect of temperature on a cement paste
TL;DR: In this article, the effect of temperature in the mineralogical composition of cement hydration products has been studied using thermogravimetric analysis (TGA) and DTG curves, which can be used to determine fire conditions and the consequent deterioration expected in the cement paste.
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Structure and Physical Properties of Hardened Portland Cement Paste
TL;DR: The main component, cement gel, is deposited in water-filled space within the visible boundaries of a body of paste; space filled with gel contains gel pores; space not filled by gel or other solid material is capillary space as mentioned in this paper.