The Realization of Clinker-reduced, Performance-based Sustainable Concrete by the Micro-filler, Eco-filler Concept

Joachim Juhart*, Michael Autischer, Marlene Sakoparnig, Markus Krüger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In times of climate change, the reduction in embodied greenhouse gas emissions is a premise for sustainable concrete infrastructure. As Portland cement clinker is mainly responsible for the high CO 2 emissions of concrete, its reduction is necessary. In order to be sustainable, the concrete must meet processing, mechanical and durability properties while taking cost aspects into account. The paper presents (i) the “micro-filler/eco-filler concept” for achieving a clinker reduced, optimised binder and (ii) a performance-based approach to put sustainable “Eco-concrete” into practice. Clinker is substituted by locally available inert fillers by at least two different particle size fractions and supplementary cementitious materials. The method is based on particle packing optimisation, reduction in water demand and optimisation of the mix ratio of the binder blend, which allows the performance requirements to be met. The new Eco-concretes deliver the desired performance in terms of processability, strength and durability (water penetration, frost, carbonation and chloride resistance) while lowering the environmental impact in comparison to standard concrete. One of the new mixes was used for a small animal passage tunnel. The direct comparison of the developed Eco-concrete and standard concrete showed a 24% reduction in CO 2, while achieving satisfactory workability, stripping strength and durability performance.

Original languageEnglish
Article number4958
JournalMaterials
Volume14
Issue number17
DOIs
Publication statusPublished - Sep 2021

Keywords

  • Durability
  • Filler
  • Performance-based design
  • SCM
  • Sustainable concrete mix-design

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)

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