The role of the aggregate shape on the compressive strength of concrete using a new micro geo-informatics methodology

Petros Petrounias; Aikaterini Rogkala; Panagiota P Giannakopoulou; Maria Kalpogiannaki; Nikolaos Laskaris; Paraskevi Lampropoulou

doi:10.1016/j.micron.2022.103333

The role of the aggregate shape on the compressive strength of concrete using a new micro geo-informatics methodology

Micron. 2022 Oct:161:103333. doi: 10.1016/j.micron.2022.103333. Epub 2022 Jul 29.

Authors

Petros Petrounias¹, Aikaterini Rogkala², Panagiota P Giannakopoulou², Maria Kalpogiannaki³, Nikolaos Laskaris⁴, Paraskevi Lampropoulou²

Affiliations

¹ Department of Geology, Section of Earth Materials, University of Patras, 26504 Patras, Greece; Chemical Process & Energy Resources Institute, Centre for Research & Technology Hellas (CERTH), Greece. Electronic address: Geo.plan@outlook.com.
² Department of Geology, Section of Earth Materials, University of Patras, 26504 Patras, Greece.
³ Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimioupolis Zografou, 15784 Athens, Greece.
⁴ Department of Industrial Design and Production Engineering, University of West Attica, GR-12244 Egaleo, Greece.

PMID: 35930967
DOI: 10.1016/j.micron.2022.103333

Abstract

In this paper the results of an experimental study on the behavior of aggregate shape on the compressive concrete strength was described. The main scope of that work is to answer whether there is a low-cost, low-energy methodology for predicting the behavior of an aggregate within a concrete and therefore its ultimate strength. This was achieved by using a combination of petrographic methods with GIS and MatLab software in a variety of lithologies when simultaneously producing a new micropetrographic index (Mshape) for the first time. For this reason, variable rocks such as sandstones, ultramafic, mafic and volcanic have been collected from Greece which are used as aggregates. Their petrographic characteristics as well as their geometrical properties were studied and hence their influence on concrete production. In the present study, a new micro-petrographic index is proposed based on the present proposed methodology which is able to act as a predictor of the aggregates shape and therefore of their behavior and suitability. Mshape index is strongly correlated with the geometrical indices of shape IE and IF as well as with the concrete strength.

Keywords: Concrete aggregates; GIS; Geometrical properties; Matlab; Micropetrographic index.