Effect of ZnO on the hydration of Portland cement

Gawlicki, M.; Czamarska, D.

doi:10.1007/bf01979629

Cited by 57 publications

(36 citation statements)

References 7 publications

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“…However, it can be expected that the hydration reaction of Portland cement pastes was retarded by ZnO. This retardation effect of zinc compound on hydration reaction agrees with previous works [22,23,[25][26][27], assuming a protective layer of zinc compounds on cement grains.…”

Section: Normal Consistency and Setting Time Of Pastessupporting

confidence: 84%

“…For the hydrated cement at different cured age (in Fig. 11), it was noticed that the O-H stretching band at 3645 cm À1 (m 3 ) was increased with increasing curing time [22,25,26,[38][39][40][41]. It was due to CH from hydration reaction which also increased with [23,25,36].…”

Section: Ftir Analysismentioning

confidence: 96%

“…At 28 days, the compressive strength of 5Z mix (60 MPa) was slightly lower than that of 1Z mix (63 MPa) but was still higher than that of PC control mix (55 MPa). Nevertheless, the presence of unset mortars was explained by Mollah [22] and Gawlicki [26] that the C-S-H layer impregnated with amorphous zinc hydroxide, hydration of calcium silicate (C 3 S and C 2 S) was obscured. Subsequently, further reaction with water is only possible after the transformation of zinc hydroxide into crystalline calcium hydrozincate (CaZn 2 (OH) 6 Á2H 2 O).…”

Section: Compressive Strength Of Mortarsmentioning

confidence: 98%

“…Similar to TiO 2 as a photocatalyst, the nano ZnO can therefore be used in self-cleaning applications in concrete structures but little is known on the fundamental understanding of nano ZnO hydration and its effect on setting time and strength. Previous researchers [22][23][24][25][26][27] tried to explain the effect of zinc ions on the hydration reaction of cement minerals and on the microstructure of hydration products during the use of industrial wastes in cement manufacture. Moreover, the decrement of heat of hydration was found when zinc oxide was used with Portland cement.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Microstructure, characterizations, functionality and compressive strength of cement-based materials using zinc oxide nanoparticles as an additive

Nochaiya

Sekine

Choopun

et al. 2015

Journal of Alloys and Compounds

111

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Section: Normal Consistency and Setting Time Of Pastessupporting

confidence: 84%

Section: Ftir Analysismentioning

confidence: 96%

Section: Compressive Strength Of Mortarsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure, characterizations, functionality and compressive strength of cement-based materials using zinc oxide nanoparticles as an additive

Nochaiya

Sekine

Choopun

et al. 2015

Journal of Alloys and Compounds

111

View full text Add to dashboard Cite

“…3 [Cu(aq)] after precipitation = 1 ppm. 4 Solubility limit ~10 -10 mol dm -3- [99]. 5 [Pb(aq)] after precipitation = 9.4 ppm.…”

Section: Discussionmentioning

confidence: 99%

Binding mechanisms of radionuclides to cement

Evans

2008

Cement and Concrete Research

138

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Radionuclide solubility is one of the factors that can determine the 'source term' for potential migration to the far field. Hence, the mechanisms of immobilisation of radionuclides in cements need close study in order to quantify the nature of the binding. The nature of the binding forces in a cement matrix is very species sensitive, so it is difficult to produce a general description. This review summarises the main sorption mechanisms and then details immobilisation mechanisms for many elements.

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Influence of ZnO nanoparticle ratio and size on mechanical properties and whiteness of White Portland Cement

et al. 2020

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The impact of nanotechnology on the cement industry has been extensively studied. Much work remains needed to improve product quality, decrease cost, and minimize the negative environmental impact. The present study explores the influence of ZnO nanoparticles on physical, chemical, and mechanical properties of White Portland Cement (WPC). Zinc oxide nanoparticles were prepared by simple ball-milling to reach average particle sizes of 70, 37, 27, and 24 nm. For each of the four size groups, ZnO nanoparticles were added to WPC at each of four concentrations (0.1, 0.4, 0.7, and 1.0 wt%). Whiteness, setting time, expansion, and compressive strength of resulting mortars were investigated. The crystal structure and morphology of mortars were respectively characterized using X-ray diffraction and scanning electron microscopy. Hydration progress was inspected using Fourier-transform infrared spectrometry. The results show that addition of ZnO to WPC pastes increases the amount of water required for normal consistency and setting time. The addition of 37 nm ZnO nanoparticles to WPC mortars at a specific weight percentage of 0.4% ZnO enhanced compressive strength at 28 days by up to 28% via filler effects. The characterizations and physicomechanical parameters for high-ZnO (1.0 wt%) mortar indicate less hydration products before 28 days but improved at 28 days.

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Effect of ZnO on the hydration of Portland cement

Cited by 57 publications

References 7 publications

Microstructure, characterizations, functionality and compressive strength of cement-based materials using zinc oxide nanoparticles as an additive

Microstructure, characterizations, functionality and compressive strength of cement-based materials using zinc oxide nanoparticles as an additive

Binding mechanisms of radionuclides to cement

Influence of ZnO nanoparticle ratio and size on mechanical properties and whiteness of White Portland Cement

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