Ripening in Chemically Aggressive Environment the HPC Reinforced with Hybrid Steel Fiber

Aldjia Boutiba (1) , Rabah Chaid (2) , Laurent Molez (3) , Raoul Jauberthie (3)

1 Département d'Architecture
2 Unité de Recherche Matériaux, Procédés et Environement - URMPE (Boumerdès, Algérie)
3 MT Rhéo

The high performance concretes reinforced with metallic fiber are used more and more in the construction. Under the current policy of sustainable development, these are the materials that procure gains of consequent mass, which can increase the durability of structures, which contributes to the reduction of the impact of cementitious materials the greenhouse effect. This study investigated the ripening of hybrid steel fiber reinforced high performance concrete, with 15% substitution of cement by blast furnace slag, in water sulphated and Rance-France seawater. This experimental study analysed the effect of 6 months of ripening of the simple, in chemically aggressive water, on the compactness and the microstructure of the cement matrix and the possible alteration of the metal fibers. The gotten results show no significant alteration or the cement matrix or fibers by water sulphated and seawater. 1 Introduction The high performance concretes reinforced with metallic fiber are used more and more in the construction, when casting in situ on the work and prefabrication. The most important advantages are hindrance of macrocracks' development, delay in microc-racks' propagation to macroscopic level and the improved duc-tility after microcracks' formation [1]. Under the current policy of sustainable development, including it's environmental and economic dimensions. This type of material acquires the mechanical resistances going from 20 to 30 MPa in 24 hours, which can increase productivity and reduce construction time on site. It provides substantial gains mass, it is possible to build with less formwork, less concrete to set up and less frames than ordinary concrete. This has been shown for HPC and VHPC (gains of 25 to 40%) [2–4]. The making of a HPC requires a cement content of 450 kg/m

Mots clés: fiber; HPC; slag; durability

Domaines: Génie civil

Aldjia Boutiba, Rabah Chaid, Laurent Molez, Raoul Jauberthie. Ripening in Chemically Aggressive Environment the HPC Reinforced with Hybrid Steel Fiber. Periodica Polytechnica Civil Engineering, 2016, 60 (1), pp.83-88. ⟨10.3311/PPci.7899⟩. ⟨hal-01201916v2⟩