Mechanical Properties of Cement Mortars Incorporating Zero-Valent Iron Nanoparticles

Ozbay A. E. O., Karapinar I. S., Yazgan A. U., Pehlivan A. O., KARAKUŞ S., Tasaltin N., ...More

JOURNAL OF MATERIALS IN CIVIL ENGINEERING, vol.34, no.1, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 1
  • Publication Date: 2022
  • Doi Number: 10.1061/(asce)mt.1943-5533.0004030
  • Journal Name: JOURNAL OF MATERIALS IN CIVIL ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Computer & Applied Sciences, Geobase, ICONDA Bibliographic, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Zero-valent iron (ZVI), Nanoparticle (NP), Cement mortar, Silica, Nanocomposites, Mechanical strength, FE3O4 NANOPARTICLES, NANO-FE2O3 POWDERS, WASTE-WATER, FLY-ASH, REMOVAL, NANO-AL2O3, NANO-SIO2, CMC
  • Istanbul University Affiliated: Yes

Abstract

In this study, the effects of zero-valent iron (ZVI) nanoparticles (NPs) on the mechanical performance of cementitious composites were investigated. For this purpose, the use of a novel nanomaterial containing ZVI NPs blended with carboxymethyl cellulose (CMC) and SiO2 was introduced. CMC/SiO2-ZVI NPs were prepared by a green and low-cost sonochemical method at room temperature and characterized using scanning electron microscopy/energy dispersive X-ray spectroscopy, thermal gravimetry analysis, Brunauer-Emmett-Teller, and X-ray diffraction techniques. The values of intrinsic viscosities of CMC/SiO2-ZVI NPs were examined to determine the optimal miscible condition as affected by the different mass ratios of CMC/SiO2 and sonication time. Then, eight different cement mortar specimens containing CMC/SiO2 and CMC/SiO2-ZVI NPs were prepared in ratios of 0.2%, 0.5%, 1%, and 2% by weight, and flexural and compressive strengths of the specimens were determined at the ages of 7 and 28 days. The microstructure of the specimens was also evaluated. Comprehensive results proving the improvement in the mechanical properties have been obtained in the specimens containing 1% and 2% CMC/SiO2-ZVI NPs. (C) 2021 American Society of Civil Engineers.