Abstract
Improvement of mechanical strength of a High Performance Fiber Reinforced Concrete (HPFRC) containing local raw materials at a cheap rate was investigated in this present work. An experimental study was conducted on different concretes based on dune sand and reinforced by metallic fibers. The concretes studied are formulated based on a Portland Cement (PC), Dune Sand (DS), Dust of Electro-filter (DE), Metallic Fibers (MF) and Superplasticizer (SP). The obtained results show that it is possible to manufacture concrete based local raw materials (inexpensive) giving compressive strength of about 105 MPa, with an improvement in ductility resulting from a tensile strength up to 20 MPa. Also, this strength improvement of the studied concrete is ensured by a simple heat treatment at a temperature of 90°C for 48 h after 28 days of curing.
Key words: Sand of dunes, dust of electro-filter, high performance fibers concrete (HPFC) thermal treatment, mechanical properties.
