Experimental investigation of mix design for high-strength alkali-activated slag concrete

•An experimental mix design method was employed for high-strength alkali-activated slag concrete (HSAASC).•The mechanical properties of HSAASC were investigated for analyzing the mix design method accuracy.•A model is proposed to predict the mix proportion from the specified compressive strength.•Re...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Construction & building materials 2021-07, Vol.291, p.123387, Article 123387
Hauptverfasser: Araújo Júnior, Nilvan T., M.E. Lima, Victor, Torres, Sara M., E.A. Basto, Priscilla, Melo Neto, Antônio A.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:•An experimental mix design method was employed for high-strength alkali-activated slag concrete (HSAASC).•The mechanical properties of HSAASC were investigated for analyzing the mix design method accuracy.•A model is proposed to predict the mix proportion from the specified compressive strength.•Results are compared with standardized correlations for Portland cement concrete (PCC). Alkali-activated slag concrete is attracting increasing attention because of its potential as an alternative to Portland cement concrete, and it has been studied in several countries. The development of high-strength alkali-activated Portland-cement-free concrete, made with ground granulated blast furnace slag and sodium silicate solution as the binder, is proposed. The Institute for Technological Research/Polytechnic School of the University of São Paulo (IPT/EPUSP) mix design method, which has never been used before for production of this type of concrete, is employed. Tests of compressive strength and dynamic modulus of elasticity were carried out at 1, 3, 7, and 28 days. In addition, static modulus of elasticity and splitting tensile strength tests were performed at 28 days. The results showed that high-strength alkali-activated slag concrete (HSAASC) developed high initial and final compressive strengths. The compressive strengths of the concretes ranged from 41 to 58 MPa and from 86 to 105 MPa at 1 and 28 days, respectively. The IPT/EPUSP mix design method proved to be a suitable methodology that can be followed for the efficient production of HSAASC.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2021.123387