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.
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