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Reactive powder concrete reinforced by nanoparticles

Reactive powder concrete reinforced by nanoparticles

Authors :
Kunlin Ma
Youjun Xie
Guangcheng Long
Ye Shi
Source :
Advances in Cement Research. 28:99-109
Publication Year :
2016
Publisher :
Thomas Telford Ltd., 2016.

Abstract

The influences of four nanoparticles of nanosilica (SiO2), nano-calcium carbonate (CaCO3), nano-aluminium oxide (Al2O3) and nano-iron oxide (Fe2O3) on workability, hydration, pore structure and mechanical strength of reactive powder concrete (RPC) are investigated by macro/microscopic methods. The aim of this study is to provide an essential basis for exploiting new-generation cementitious materials with ultra-high strength and super-long service life by employing modern nano-modification technology. The results indicate that addition of low-dosage nanoparticles to RPC shows a remarkable influence on the mechanical strength, hydration and pore structure compared to the ordinary cement system with a relatively high water/cement ratio. The compactness and mechanical strength of RPC can be greatly improved by incorporating nanoparticles. The promotive ratio of flexural and compressive strength of RPC is up to 30%. The elevated temperature further promotes the effect of nanoparticles on the strength of RPC. The seeding effect of nanoparticles on hydration of cement and the nano-size filling role are strengthened in the RPC system.

Details

ISSN :
17517605 and 09517197
Volume :
28
Database :
OpenAIRE
Journal :
Advances in Cement Research
Accession number :
edsair.doi...........d5de7fa936ef27d907aeebed6e76c4af
Full Text :
https://doi.org/10.1680/jadcr.15.00058