期刊论文详细信息
Materials Research
The Effects of ZnO2 nanoparticles on strength assessments and water permeability of concrete in different curing media
Ali Nazari1  Shadi Riahi1 
[1] ,Islamic Azad University Department of Materials Science and Engineering, Saveh Branch Saveh,Iran
关键词: ZnO2 nanoparticle;    compressive strength;    split tensile strength;    flexural strength;    percentage of water absorption;    curing medium;    concrete;    TGA;    XRD;    pore structure;   
DOI  :  10.1590/S1516-14392011005000030
来源: SciELO
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【 摘 要 】

In this study, the effect of limewater on strength assessments and percentage of water absorption of concrete incorporating ZnO2 nanoparticles has been investigated. Portland cement was partially replaced by ZnO2 nanoparticles with the average particle size of 15 nm and the specimens were cured in water and saturated limewater for specific ages. The results indicate that ZnO2 nanoparticles up to 2.0 weight percent could produce concrete with improved strength and water permeability when the specimens cured in saturated limewater while this content is 1.0 weight percent for the specimens cured in tap water. Although the limewater reduces the strength of concrete without nanoparticles when compared with the specimens cured in water, curing the specimens bearing ZnO2 nanoparticles in saturated limewater results in more strengthening gel formation around nanoparticles causes improved permeability together with high strength. In addition, ZnO2 nanoparticles are able to act as nanofillers and recover the pore structure of the specimens by decreasing harmful pores. Accelerated peak appearance in conduction calorimetry tests, more weight loss in thermogravimetric analysis and more rapid appearance of peaks related to hydrated products in X-ray diffraction results, all indicate that ZnO2 nanoparticles could improve mechanical and physical properties of the specimens.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

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