A comparative study on the pozzolanic activity between nano-SiO2 and silica fume

Ye, Qing; Zhang, Zenan; Li, Sheng; Rongshen, Chen

doi:10.1007/bf02840907

Cited by 134 publications

(72 citation statements)

References 11 publications

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“…Only, there are several reports on incorporation of nanoparticles in NVCs which most of them have focused on using SiO 2 nanoparticles [10][11][12][13][14][15][16][17][18][19] and TiO 2 nanoparticles 20,21 .…”

Section: Introductionmentioning

confidence: 99%

The effects of ZrO2 nanoparticles on physical and mechanical properties of high strength self compacting concrete

Nazari

Riahi

2010

Mat. Res.

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In this work, strength assessments and coefficient of water absorption of high performance self compacting concrete containing different amounts of ZrO 2 nanoparticles have been investigated. The results indicate that the strength and the resistance to water permeability of the specimens are improved by adding ZrO 2 nanoparticles in the cement paste up to 4.0 wt. (%). ZrO 2 nanoparticles, as a result of increased crystalline Ca(OH) 2 amount especially at the early age of hydration, could accelerate C-S-H gel formation and hence increase the strength of the concrete specimens. In addition, ZrO 2 nanoparticles are able to act as nanofillers and recover the pore structure of the specimens by decreasing harmful pores. Several empirical relationships have been presented to predict flexural and split tensile strength of the specimens by means of the corresponding compressive strength at a certain age of curing. Accelerated peak appearance in conduction calorimetry tests, more weight loss in thermogravimetric analysis and more rapid appearance of the peaks related to hydrated products in X-ray diffraction results, all indicate that ZrO 2 nanoparticles could improve mechanical and physical properties of the concrete specimens.

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Section: Introductionmentioning

confidence: 99%

The effects of ZrO2 nanoparticles on physical and mechanical properties of high strength self compacting concrete

Nazari

Riahi

2010

Mat. Res.

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“…In both cases, the addition of nano-scale particles improves the performance of cement; for instance, an improvement of rheological properties has been observed in the fresh cement mixtures [10], whereas, the compressive strength was increased in the hardened state [11]. The nano-scale observations revealed the nano-crystallized structure of C-S-H cement phase [12,13], and the nanoparticles work as a nucleation site for the cement phase promoting a cement hydration [14,15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Adding Silicon Carbide and Titanium Carbide Nanoparticles on the Performance of the Cement Pastes

Mahawish¹,

Ibrahim²,

Jawad³

et al. 2017

J Civil Environ Eng

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The nanoparticle is used into cement pastes to improve its engineering properties. In this paper, silicon carbide (SiC) and titanium carbide (TiC) nanoparticles with a particle size (20 nm) were added at different percentages 1%, 2%, 3%, 4%, 5% and 6%) to cement pastes. The cement pastes were tested for mechanical and physical properties at different curing ages (7, 14, 21, and 28 days). The results of mechanical and physical tests showed a significant improvement with all mixtures of nanoparticles, and the maximum values of the mechanical and physical tests were associated with the cement paste samples with 5% TiC at curing time 28 days. SEM results showed the control samples of cement paste had needle shapes to structure Ca(OH)2 with the of large pores. However, adding of nanoparticles resulted in absence of needle shape structures, pore spaces and produced a homogeneous structure of compounds (C-SH).

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“…There are several reports on merging nanoparticles in concrete specimens which most of them have focused on using SiO 2 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and TiO 2 nanoparticles [17][18][19] . SiO 2 nanoparticles have been found to improve concrete strength 2,9,11 , to increase resistance to water permeability 12 , and to help control the leaching of calcium 13 , which is closely associated with various types of concrete degradation.…”

Section: Introductionmentioning

confidence: 99%

“…SiO 2 nanoparticles have been found to improve concrete strength 2,9,11 , to increase resistance to water permeability 12 , and to help control the leaching of calcium 13 , which is closely associated with various types of concrete degradation. SiO 2 nanoparticles, in addition, have been shown to promote the hydration reactions of C 3 S as a result of the large and highly reactive surface of the nanoparticles 10,14 . SiO 2 nanoparticles have been found to be more efficient in enhancing strength than silica fume 15,16 .…”

Section: Introductionmentioning

confidence: 99%

Improvement compressive strength of cementitious composites in different curing media by incorporating ZrO2 nanoparticles

et al. 2012

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In the present work, the effect of curing medium on microstructure, physical, mechanical and thermal properties of ZrO 2 nanoparticles blended concrete has been investigated. ZrO 2 nanoparticles were partially used instead of cement by 0.5, 1.0, 1.5 and 2.0 weight percent. Curing of the specimens was carried out in water and saturated limewater for 7, 28 and 90 days. The results indicate that ZrO 2 nanoparticles up to maximum of 2.0% produces cementitious composite with improved compressive strength by curing in saturated limewater. The optimum level of replacement for the specimens cured in water was 1.0 weight percent. ZrO 2 nanoparticles can improve the filler effects and also the high activity of fine particles substantially increases the quantity of strengthening gel. Although the limewater reduces the strength of concrete without nanoparticles when compared with the specimens cured in water, curing the specimens in saturated limewater results in more strengthening gel formation around ZrO 2 nanoparticles blended concrete causes high strength.

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A comparative study on the pozzolanic activity between nano-SiO2 and silica fume

Cited by 134 publications

References 11 publications

The effects of ZrO2 nanoparticles on physical and mechanical properties of high strength self compacting concrete

The effects of ZrO2 nanoparticles on physical and mechanical properties of high strength self compacting concrete

Effect of Adding Silicon Carbide and Titanium Carbide Nanoparticles on the Performance of the Cement Pastes

Improvement compressive strength of cementitious composites in different curing media by incorporating ZrO2 nanoparticles

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