ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Toughening of Cement Composites with Wollastonite Micro-Fibers

Author(s): Vikram Dey, Amir Bonakdar, Mehdi Bakhshi and Barzin Mobasher

Publication: Symposium Paper

Volume: 319

Issue:

Appears on pages(s): 10.1-10.16

Keywords: wollastonite, fracture, shrinkage, digital image correlation, fibers, crack width

DOI: 10.14359/51700859

Date: 6/1/2017

Abstract:
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. Microstructural 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. Keywords: