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Research Article
Improving early strength and durability of eco-friendly mortars: Investigating the influence of limestone filler fineness and blast furnace slag combination
Ammar Noui1, Ahmed Abderraouf Belkadi1, Leila Zeghichi2, Oussama Kessal1, Mohammed Sallah Bouglada3, Yacine Achour1, João Castro Gomes4
1Department of Civil Engineering Faculty of Sciences and Technology University Mohamed El Bachir El Ibrahimi of Bordj Bou Arreridj ElAnasser 34030 Algeria
2Department of Civil Engineering and Hydraulic Mohamed Khider University Biskra Algeria
3Department of Civil Engineering Batna 2 University Algeria
4C-MADE Centre of Materials and Building Technologies Covilhã UBI University Portugal
Keywords
Abstract
Blast furnace slag;
Limestone filler;
Ternary mortars;
Carbonation;
Chemical attack;
Durability
This study investigates eco-friendly approaches for enhancing the early mechanical strength and durability of mortars utilizing slag. a byproduct of the steel industry. Mortars incorporating slag often exhibit inferior strength and durability compared to those made with cement. The objective is to ameliorate these properties through the incorporation of limestone filler (LF) and granulated ground blast furnace slag (BFS) at varying proportions. either independently or in combination. The physical properties (gas permeability). mechanical properties (compressive and flexural strength at 2. 7. 28. 365. 1095 days). and durability (HCL chemical attack and carbonation) of the resultant mortars were assessed. along with their microstructure using scanning electron microscopy and mercury porosimeter. Experimental findings indicate that the inclusion of LF enhances the initial strength of ternary mortars containing 10-17.5% LF and 10-25% BFS. while subsequent hydration of BFS yields mortars with comparable or superior compressive strength and resistance to chemical attack (HCL) relative to the reference mortar after 365 days.
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