Journal ArticleDOI
Nano-modification of cementitious material: toward a stronger and durable concrete
TLDR
In this article, the recent progresses of nanomodification of cementitious materials with the mostly used nanomaterials such as nano-SiO2, nanoclay, nano-Al2O3, and carbon nano materials (carbon nanotubes and nanofibers) are reviewed.Abstract:
Nanotechnology in construction and building materials has attracted great attention in recent years. Results demonstrated that nanomodification of cementitious materials can lead to significant improvement of the mechanical property, compactness, and durability. In this paper, based on the major characteristics of nanomaterials when used in cement-based materials, the recent progresses of nanomodification of cementitious materials with the mostly used nanomaterials such as nano-SiO2, nanoclay, nano-Al2O3,and carbon nano materials (carbon nanotubes and nanofibers) are reviewed. Modification effects and their influencing mechanisms of nanomaterials introduced by their specific features, such as the hydration seeding effect, the filling effect, the thixotropy-modifying effect, and the chemical reactivity feature on the properties of cementitious materials are reviewed. It is suggested that a stronger, greener, and more durable cementitious material can be obtained through the help of nanomodification.read more
Citations
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A review on concrete surface treatment Part I: Types and mechanisms
TL;DR: In this paper, the authors present comprehensive details of four types of concrete surface treatments, including surface coating, hydrophobic impregnation, pore blocking surface treatment and multifunctional surface treatment.
Journal ArticleDOI
The past and future of sustainable concrete: A critical review and new strategies on cement-based materials
Jorge de Brito,Rawaz Kurda +1 more
TL;DR: A global and extensive review is made here to provide an overall view of concrete sustainability in all possible paths and to open the minds of the readers to the vastly unexplored world of “green concrete”.
Journal ArticleDOI
Effects of nano-particles on failure process and microstructural properties of recycled aggregate concrete
TL;DR: In this article, the effects of nano-particles including nano-silica (NS) and nano-limestone (NL) on the crack propagation and microstructure properties of recycled aggregate concrete (RAC) were experimentally investigated.
Journal ArticleDOI
Properties improvement of fly ash cenosphere modified cement pastes using nano silica
TL;DR: In this article, the effect of nano silica on the properties of cement pastes incorporated with of fly ash cenospheres (FACs) has been investigated, and it was found that NS was beneficial in improving the mechanical strength.
Journal ArticleDOI
A novel green reinforcement corrosion inhibitor extracted from waste Platanus acerifolia leaves
Qingyang Liu,Zijian Song,Han Han,Han Han,Saddick Donkor,Linhua Jiang,Wanyi Wang,Hongqiang Chu +7 more
TL;DR: In this paper, an environmentally friendly corrosion inhibitor was prepared from waste Platanus acerifolia leaves (PAL) for reducing the chloride-induced reinforcement corrosion four extraction methods were employed in the preparation work The inhibiting performances of the four types of PAL extracts and two benchmark inhibitors were studied by various electrochemical measures.
References
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Journal ArticleDOI
Nanotechnology in concrete – A review
TL;DR: In this paper, the state of the field of nanotechnology in concrete is reviewed and the impact of recent advances in instrumentation and computational materials science and their use in concrete research is discussed.
Journal ArticleDOI
Microstructure of cement mortar with nano-particles
TL;DR: In this paper, the mechanical properties of nano-Fe2O3 and nano-SiO2 cement mortars were experimentally studied and the experimental results showed that the compressive and flexural strengths measured at the 7th day and 28th day of the cement mortar mixed with the nano-particles were higher than that of a plain cement mortar.
Journal ArticleDOI
Two Parameter Fracture Model for Concrete
Yeoushang Jenq,Surendra P. Shah +1 more
TL;DR: In this article, a two parameter fracture model is proposed to include this nonlinear slow crack growth and the critical effective crack extension is dictated by the elastic critical crack tip opening displacement, CTODc.
Journal ArticleDOI
The nanogranular nature of C–S–H
TL;DR: In this article, a grid indentation technique was used to identify two structurally distinct but compositionally similar C-S-H phases heretofore hypothesized to exist as low density (LD) and high density (HD) C−S−H, or outer and inner products, based on a statistical analysis of hundreds of nanoindentation tests.
PatentDOI
Highly dispersed carbon nanotube-reinforced cement-based materials
TL;DR: In this paper, a composite cement material is prepared from cement material and carbon nanotubes, wherein the carbon-nanotubes are present from about 002 wt % to about 1 0 % based on the weight of the cement material.