Strain-hardening ettringite-based composite with polypropylene fiber reinforced ladle slag: durability under combined chloride and sulfate attack

Author(s): Hoang Nguyen (1), Paivo Kinnunen (1), Valter Carvelli (2), and Mirja Illikainen (1)
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 234-240
Total Pages: 7
Language : English

Abstract: Ladle slag, an industrial waste from steel manufacturing processes, is an interesting raw material for sustainable inorganic binders. In earlier work, we have developed an ettringite- based binder (LSG) from the hydration between ladle slag and gypsum. In addition, polypropylene (PP) fiber was employed to attain a strain-hardening cementitious composite from LSG. To investigate the durability of PP fiber reinforced LSG, the composite was exposed to a combined chloride and sulfate environment under freeze-thaw cycling. The compressive and flexural behavior of PP fiber reinforced LSG after up to 180 freeze-thaw cycles was experimentally characterized. The experimental results confirm the durability of LSG under Na2SO4-NaCl environment. Furthermore, the PP fibers generally enhance the mechanical properties and durability of the reinforced composite. Since there is a lack of study on the durability of ettringite-based binders from industrial wastes under harsh environments, this experimental study reveals the feasibility of using fiber reinforced ettringite-based composite as an alternative construction material.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00