Published date: May 03 2020

Journal Title: KnE Engineering

Issue title: STARTCON19 - International Doctorate Students Conference + Lab Workshop in Civil Engineering

Pages: 202–213

DOI: 10.18502/keg.v5i5.6941

Naim Sedirasedira.naim@ubi.ptCentre of Materials and Building Technologies (C-MADE/UBI), Department of Civil Engineering and Architecture, University of Beira Interior (UBI), 6201-001 Covilhã, Portugal

João Castro-GomesCentre of Materials and Building Technologies (C-MADE/UBI), Department of Civil Engineering and Architecture, University of Beira Interior (UBI), 6201-001 Covilhã, Portugal

This study investigates the effect of the increasingly compressing pressures on the properties of the low liquid-to-solid (L/S) ratio binary alkali-activated binder to use as a binder for the manufacturing of engineered stones. The binders were a combination of two types of wastes (aluminosilicate source) as precursors (TMWM 50 Vt.% + EAF-Slag 50 Vt.%), blended with (11.11 wt.%) alkaline activator solution (NaOH/Na2SiO3 with weight ratio 4/1). The mixtures were molded in cube and exposed to five different pressures (20, 40, 60, 80 and 100 MPa) in order to obtain a compressed alkali-activated binder. The main evaluation techniques in this study were compressive strength, and Fourier Transform Infrared Spectroscopy (FTIR). The results showed that the maximum compressive strength (50.57 MPa) was obtained at a pressing pressure 100 MPa at twenty-eight days of testing.

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