Mechanical Properties of Nanocomposite Cement Incorporating Surface-Treated and Untreated Carbon Nanotubes and Carbon Nanofibers

To study the effects of functionalized carbon nanotubes (CNTs) and carbon nanofibers (CNFs) on the mechanical properties of cement composites, both untreated and treated CNFs and CNTs were added to cement paste in concentrations of 0.1% and 0.2% by weight of cement. The surface-treated nanofilaments were functionalized in a solution of sulfuric acid (H2SO4) and nitric acid (HNO3). The nanofilaments were dispersed by using an ultrasonic mixer and were then cast into molds. Each specimen was tested in a custom-made three-point flexural test fixture to record the mechanical properties (i.e., the Young’s modulus, flexural strength, ductility, and modulus of toughness) at the age of 7, 14, and 28 days. The microstructure was analyzed by using a scanning electron microscope. Untreated CNTs and CNFs were found to enhance the mechanical properties of cementitious materials, whereas the acid-treated CNTs and CNFs degraded the mechanical properties.

• Record URL:
  • https://doi.org/10.1061/(ASCE)NM.2153-5477.0000041
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/21535434
• Supplemental Notes:
  • Copyright © 2012 American Society of Civil Engineers
• Authors:
  • Al-Rub, Rashid K Abu
  • Tyson, Bryan M
  • Yazdanbakhsh, Ardavan
  • Grasley, Zachary
• Publication Date: 2012-3-1

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 1-6
• Serial:
  • Journal of Nanomechanics and Micromechanics
  • Volume: 2
  • Issue Number: 1
  • Publisher: American Society of Civil Engineers
  • ISSN: 2153-5434
  • Serial URL: http://ascelibrary.org/toc/jnmoco/4/1

Subject/Index Terms

• TRT Terms: Cement; Composite materials; Mechanical properties; Microstructure; Nanostructured materials; Surface treating
• Subject Areas: Highways; Materials; I30: Materials;

Filing Info

• Accession Number: 01375814
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Jul 18 2012 4:12PM