FLEXUAL RESPONSE OF BTRC WITH PRE-TENSION AND SHORT FIBERS UNDER LOW SPEED IMPACT LOADS

Author(s): Sai Liu and Deju Zhu
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference on UHPC Materials and Structures (UHPC2018-China)
Editor(s): Caijun Shi and Baochun Chen
ISBN: 978-2-35158-219-0
e-ISBN: 978-2-35158-220-6
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 488-507
Total Pages: 20
Language : English

Abstract: The flexural impact properties of basalt textile reinforced concrete (BTRC) specimens with
pre-tension, short carbon, steel, and AR-glass fibres were investigated. The flexural strength,
flexural modulus and toughness, were determined under different impact speeds. The flexural
strength and toughness of the BTRC specimens without pre-tension significantly increased
when the impact speed (1.0–3.0 m/s) and the number of basalt textiles layers were increased.
The flexural modulus initially increased and subsequently decreased with increasing impact
speed. When the basalt textile had four reinforcement layers, the BTRC reinforced with 0.5
Vol% of short carbon fiber or short steel fiber exhibited varied different flexural responses
under different impact speeds (1.0–4.0 m/s). In addition, pre-tensioned BTRC with different
short fibers were tested under an impact speed of 1.0 m/s. The flexural strength decreased as
the short carbon fiber and glass fiber contents increased. The highest flexural strength was
observed in the pre-tensioned specimen with 0.5 Vol% of short glass fiber and three layers of
basalt textile. The addition of short fibers in cement matrix, the number of textile layer used
as reinforcement, the pretension on textile, and the impact speeds used in the tests can
significantly affect the dynamic impact behaviour of BTRC samples.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00