Effect of acids and sulphates on the durability of self-compacting concretes

Salhi Mohamed (1) , Alex Li (2) , Ghrici Mohamed (3) , Christophe Bliard , Boubekeur Toufik (3)

1 CUR - Centre universitaire de Rezilane
2 GRESPI - Groupe de Recherche en Sciences Pour l'Ingénieur - EA 4694
3 UHBC - Université Hassiba Ben Bouali de Chlef

The deterioration of self-compacting concretes (SCC) in acid and sulphate media is a major problem in the evaluation of structural durability. The aim of our work is to study this effect and to do this, a test protocol was used to evaluate the effect of sulphate and acidic media on the mechanical properties and microstructure of SCCs. Two types of cement were used CEMIII-A-42.5 cement (60% slag) and cement CEMI-52.5 and three water / binder ratios (E / L = 0.32-0.38-0.44). The SCC specimens were stored in all three media, water (control), 5% H2SO4 and 5% Na2SO4. The measured properties were: The compressive strength of cubic test pieces at 30, 90 and 180 days and X-ray diffraction (XRD) analysis. These results show that high furnace slag improves the durability of SCCs.

Mots clés: Durability; sulfuric acid; sodium sulfate; SCC; Cement Industry; Concrete ettringite formation sulfate reaction

Domaines: Matériaux; Chimie inorganique; Matériaux composites et construction

Salhi Mohamed, Alex Li, Ghrici Mohamed, Christophe Bliard, Boubekeur Toufik. Effect of acids and sulphates on the durability of self-compacting concretes. 4th International Symposium on Materials and Sustainable Development, Abdelhakim DAOUI, Nov 2019, Boumerdes, Algeria. ⟨hal-02367771⟩