Effect of pre-impregnation process on the tensile behavior of glass yarn/ettringitic matrix composite

Author(s): Omayma HOMORO, Marie MICHEL and Thouraya. N. BARANGER
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 247-254
Total Pages: 8
Language : English

Abstract: Textile Reinforced Concrete (TRC) is a composite cement-based material reinforced with alkali-resistant (AR) glass, carbon, basalt or aramid fabrics. During the last decades, these composites are being increasingly used to build thin and lightweight structures and to strengthen or repair damaged structures. However, the use of multifilament reinforcements for cements is challenging because the cement particles cannot fully penetrate the space between the inner filaments. This decreases the yarn/matrix bond and consequently the mechanical performance of the composite. To improve this bond, the glass yarns are typically pre-impregnated in a wet manner using mineral or organic matrices. The objective of this work is to compare this conventional method with an alternative method called pre-impregnation in a dry manner. It is based on using an alternating electrostatic field that allows powder to be impregnated into yarns. Classical tensile tests have been used for the mechanical characterization of glass yarn/ettringitic matrix composites. Three types of specimens have been tested: a dry yarn (D), a yarn pre-impregnated in a wet manner (PIW) with matrix particles, and a yarn pre-impregnated in a dry manner (PID) with three different types of powders. These tests allowed to identify the tensile mechanical properties of composites and to highlight the efficient pre-impregnation process.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00

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