Toughening of cement composites with wollastonite micro-fibers

V. Dey, A. Bonakdar, M. Bakhshi, Barzin Mobasher

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Synopsys: Wollastonite, a calcium meta-silicate mineral with acicular microstructure can be used in cementbased materials for micro-reinforcing the brittle matrix. Contribution of wollastonite particles in toughening and crack mitigation of cement mortar systems in its early age and hardened state, were studied. Elaborate testing was conducted to quantify the ability of wollastonite to restrain early age plastic shrinkage cracking, and fracture toughness of hardened cement mortar materials. Micro-structural investigations on these blended systems validated the contribution of these wollastonite particles in the enhancement of mechanical properties through classical toughening mechanisms such as crack bridging, fiber pullout and rupture.

Original languageEnglish (US)
Title of host publicationAmerican Concrete Institute, ACI Special Publication
PublisherAmerican Concrete Institute
Pages79-94
Number of pages16
Volume2017-January
EditionSP 319
ISBN (Print)9780870312991
StatePublished - 2017
EventReduction of Crack Width with Fiber at the ACI Fall 2016 Convention - Philadelphia, United States
Duration: Oct 23 2016Oct 24 2016

Other

OtherReduction of Crack Width with Fiber at the ACI Fall 2016 Convention
CountryUnited States
CityPhiladelphia
Period10/23/1610/24/16

Keywords

  • Crack width
  • Digital image correlation
  • Fibers
  • Fracture
  • Shrinkage
  • Wollastonite

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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