1. L. G. G. laboratory, Jijel University, BP 98, Cité Ouled Aissa, Jijel, 18000, Algeria; L. M. D. C. laboratory, Dept of Civil Engineering, Mentouri University, Route Ain El Bey Constantine 25000, Algeria
2. L. M. D. C. laboratory, Dept of Civil Engineering, Mentouri University, Route Ain El Bey Constantine 25000, Algeria
3. Dept of Civil Engineering, IUT, INSA de Rennes. 3, Rue Clos Courtel, BP.90422, 35704 Rennes cedex 7, France