Quantitative methods used to characterize the impregnation of a glass multifilament yarn by a cementitious matrix

Hana Aljewifi (1) , Bruno Fiorio (1) , Jean-Louis Gallias (1)

1 L2MGC - Laboratoire de mécanique et matériaux du génie civil

This paper presents two experimental methods that allow to quantify the impregnation level of the yarn / matrix interface, in the case of Textile Reinforced Concrete (TRC). These methods have been tested on three different glass yarns laid in a cementitious matrix, with three different impregnation levels resulting from the manufacturing process. The first method (comparative mercury intrusion porosity test) is based on the evaluation by mercury intrusion porosity of the pores volume associated to the porosity inside and near the yarn. The second method (flow test) consists in measuring the flow rate of water along the yarn, with imposed flow conditions. The physical parameters measured by these two methods are both related to the pore size and to the porosity of the yarn / matrix interface. The results of the two methods are discussed and drawn in parallel to a qualitative characterization of the yarn / matrix interface made by scanning electronic microscopy. As a result, it is shown how the two methods described here can participate to characterize the yarn impregnation. Limitations of the methods are also discussed.

Domaines: Matériaux et structures en mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Matériaux

Hana Aljewifi, Bruno Fiorio, Jean-Louis Gallias. Quantitative methods used to characterize the impregnation of a glass multifilament yarn by a cementitious matrix. 4th Colloquium on Textile Reinforced Structures (CTRS4), Jun 2009, Dresden, Germany. ⟨hal-00563826⟩