Rheology and Its Relation to Strain-Hardening Properties of Strain-Hardening Cement-Based Composites

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Title: Rheology and Its Relation to Strain-Hardening Properties of Strain-Hardening Cement-Based Composites

Author(s): Galal Fares and Mohammad Iqbal Khan

Publication: Materials Journal

Volume: 116

Issue: 5

Appears on pages(s): 193-203

Keywords: polyvinyl alcohol fiber dispersion; rheological properties; strain-hardening cement-based composites; strain-hardening properties

Date: 9/1/2019

Abstract:
An improvement of the rheology of strain-hardening cement-based composites (SHCCs) has a maximal influence on the dispersion of microfibers in the cementitious matrix. Efficient fiber dispersion leads to a better SHCC performance with the lowest fiber content. The efficiency of the crack-bridging force of polyvinyl alcohol (PVA) microfibers for load transfer within the cementitious matrix is affected by SHCC composition, which is a function of the ingredients of the mixture and its rheology. The aim of this work was to monitor and evaluate the modification taken place in the rheology of a successful SHCC mixture due to the initial and gradual incorporation of its individual ingredients. A correlation between the optimized rheological parameters of successful SHCC mixture and its strain-hardening properties was established. Rheology of SHCC is an important tool to formulate cost-effective and efficient SHCC mixtures within a defined range of rheological parameters.