Micromechanical Analysis of Blended Cement-based Composites

Date This project started on 01 September 2012 and ended on 01 September 2016

Status This project is Finished

Authors
CTU Prague, CZ
TU Wien, AT
Objectives

Blending Portland cements with supplementary cementitious materials presents attractive approach for cement manufacturers to cut down production cost and CO2 emissions. No matter how well the binders perform in the long-term, they need to meet prescriptive code requirements in terms of early strength gain. The reaction kinetics have been already studied in the Core project 4 and Core project 9 and a chemo-mechanical microstructural link will be established now.

The objectives read:

  • Generate a comprehensive database for cement pastes, produced with pure and blended Portland Cements, and test them from one day after the production up to mature stages. Determine compressive and tensile strengths as well as the elasticity modulus during maturing. Obtain complementary microstructural characterization on the hydration degrees of individual microstructural phases and on the porosity.
  • Identify the microstructural constituents governing the evolution of macroscopic mechanical properties with increasing degree of hydration.
  • Develop predictive micromechanical models for compressive strength evolution from one day after the production to mature stages, i.e. link initial blend composition and hydration degrees to macroscopic compressive strength.

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