Synthesis of Zinc Oxide Nanoparticles and Their Effect on the Compressive Strength and Setting Time of Self-Compacted Concrete Paste as Cementitious Composites

Abstract

In the present study, the mechanical properties of self-compacting concrete were investigated after the addition of different amounts of ZnO nanoparticles. The zinc oxide nanoparticles, with an average particle size of about 30 nm, were synthesized and their properties studied with the help of a scanning electron microscope (SEM) and X-ray diffraction. The prepared nanoparticles were partially added to self-compacting concrete at different concentrations (0.05, 0.1, 0.2, 0.5 and 1.0%), and the mechanical (flexural and split tensile) strength of the specimens measured after 7, 14, 21 and 28 days, respectively. The present results have shown that the ZnO nanoparticles were able to improve the flexural strength of self-compacting concrete. The increased ZnO content of more than 0.2% could increase the flexural strength, and the maximum flexural and split tensile strength was observed after the addition of 0.5% nanoparticles. Finally, ZnO nanoparticles could improve the pore structure of the self-compacted concrete and shift the distributed pores to harmless and less-harmful pores, while increasing mechanical strength.

Comparison of characteristics of selected metallic and metal oxide nanoparticles produced by picosecond laser ablation at 532 and 1064 nm wavelengths

“…36-1451 [34]. Very similar values have also been reported by Arefi and Saeed [35], Dutta and Bichitra [36] and Prabhu et al [34]. A peak at 60°was observed at both wavelengths; this might be due to the glass substrate.…”

Anticancer nanodelivery system with controlled release property based on protocatechuate–zinc layered hydroxide nanohybrid

“…10 ZLHs are currently being used as an additive in concrete, 11 slow release herbicides 12 and drug nanoreservoirs. 13,15 Some anticancer drugs have been intercalated into interlamellae of ZLH, including chlorogenic acid, 13 linoleic acid, 14 ellagic acid, 15 hippuric acid 16 and gallic acid.…”

Tuning Internal Strain in Metal–Organic Frameworks via Vapor Phase Infiltration for CO2 Reduction

“…The strain is most likely induced by ZnO clusters grown inside the MOF structure during the VPI process, causing crystal lattice distortion similar to an overstuffed box. Existence of ZnO clusters is further confirmed by the presence of three additional characteristic peaks between 30° and 40° for both MOF‐Zn‐inf and MOF‐ZnO, which correspond to the (100), (002), and (110) planes of ZnO . Furthermore, the effect of varying the number of VPI cycles on internal strain was studied.…”