Title: Durability of Alkali-Activated Slag Concretes Prepared Using Waste Glass as Alternative Activator

Author(s): Manuel Torres-Carrasco, Monique T. Tognonvi, Arezki Tagnit-Hamou, and Francisca Puertas

Publication: Materials Journal

Volume: 112

Issue: 6

Appears on pages(s): 791-800

Keywords: alkali-activated slag; alternative alkaline activators; durability; waste glass

DOI: 10.14359/51687903

Date: 11/1/2015

Abstract:
Concrete is by far the most used building material in the world, but is facing a large environmental challenge due to its cement content. The production of portland cement is responsible for 5 to 8% of worldwide CO2 emissions. Waste and supplementary cementing materials (SCMs) such as blast-furnace slag can be used as partial or total substitute for portland cement to avoid or to reduce this negative effect. This work explores the study of durability and the mechanical behavior of concretes using urban and industrial waste glasses as a potential alkaline activator for slag (AAS). The development of strengths and microstructure in the concretes activated with waste glass were also comparable to the parameters observed in AAS concretes prepared with conventional activators. Durability tests, including chloride penetration resistance, freezingand-thawing resistance, carbonation, resistivity, and porosity, were conducted and the effect of the different parameters such as the activator type is discussed.