Effects of the composing materials on the rheological and mechanical properties of ultra-high performance concrete (UHPC)

Author(s): K-T. Koh, G.S. Ryu, J-J. Park, K.H. An, S.W. Kim, S-T. Kang
Paper category: Symposium
Book title: RILEM-fib-AFGC International Symposium on Ultra-High Performance Fibre-Reinforced Concrete
Editor(s): F. Toutlemonde, J. Resplendino
Print ISBN: 978-2-35158-130-8
e-ISBN: 978-2-35158-131-5
Publisher: RILEM Publications S.A.R.L
Pages: 749 – 756
Total Pages: 8
Language: English

Abstract: 
Since Ultra-High Performance Concrete (UHPC) necessitates large quantities of high-cost materials like steel fibre, silica fume and superplasticizer, its fabrication cost is known to be significantly higher than ordinary concrete. This paper investigates the use of Zr silica powder instead of silica fume to reduce the amount of superplasticizer by improving the workability. As a result, compared to the conventional UHPC using silica fume, UHPC using Zr silica powder enables to diminish the amount of superplasticizer by 50 to 70% while securing a flow of 210 to 230 mm, a compressive strength of 180 MPa, a flexural tensile strength of 35 MPa and a tensile strength of 15 MPa.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00