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Épron, France

Fouzia K.,ESITC Caen | Moussa K.,National Engineering School of Tarbes
Applied Mechanics and Materials | Year: 2011

Creep in cementitious materials is an important part of the delayed strains. It is a complex phenomenon in which many physical and chemical parameters are involved. In this paper, an experimental program was conducted to clarify the creep performance of CFRP strengthened mortar. The main parameters under study are the age at the time of loading and the drying. Specimens are tested at a sustained load of 30% of the ultimate strength. These investigations show the interest of the reinforcement by CFRP of the prismatic mortar specimens, this one allows a notable improvement of the creep behavior. ©(2011) Trans Tech Publications, Switzerland.


Sawsen C.,ESITC Caen | Fouzia K.,ESITC Caen | Mohamed B.,ESITC Caen | Moussa G.,CNRS Crystallography and Material Science Laboratory
Construction and Building Materials | Year: 2015

The association of plant fibers with cement paste raises a number of problems in both fresh and hardened states. Different treatments are applied to flax fibers with various methods within the aim to enhance the rheological properties of the cement mortar-fiber mixtures. Thus, the effects of these treatments on the properties of the fibers are evaluated. The rheological characteristics of the cement mixtures and the mechanical properties of the composites are assessed. Results show an improvement in the properties of the fibers, better rheological behavior of the cement mixtures and an increase of the mechanical strength of the composites. © 2015 Elsevier Ltd. All rights reserved.


Sawsen C.,ESITC Caen | Fouzia K.,ESITC Caen | Mohamed B.,ESITC Caen | Moussa G.,CNRS Crystallography and Material Science Laboratory
Construction and Building Materials | Year: 2014

Because of their hydrophilic nature, flax fibers absorb water during the mixing stage and release it gradually during the curing step. Thus, the rheological properties and the setting of the cement paste are deeply disturbed. In addition, the diametrical shrinkage of the fiber in the desorption stage can lead to a weakening of the fiber-matrix bond. It is therefore necessary to carry out treatment of the fiber and/or cement mixture to prevent the fiber/matrix debonding. The results obtained from these formulations show an improvement in the rheology and the mechanical performances of the composites. © 2014 Elsevier Ltd. All rights reserved.

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