ASSESSMENT OF COARSE BASALT AGGREGATE IN ULTRA-HIGH PERFORMANCE CONCRETE (UHPC)

Author(s): Q.L. Yu, P.P. Li and H.J.H. Brouwers
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: 195-204
Total Pages: 10
Language : English

Abstract: In the present research, UHPCs applying coarse basalt aggregate are designed by using the
particle packing theory and optimal mineral proportion. The mineralogical composition effect,
basalt aggregate size effect and powder content effect were analyzed and discussed, based on
the workability and compressive strength of the designed UPHC. The results show that the
optimal proportion of powder is 5% of micro-silica and 20% of limestone powder by the
weight of powder. The coarse basalt aggregate has a rather limited influence on the
mechanical strength of UHPC, and a slight decreasing trend is observed with the increase of
maximum size of basalt aggregate. The optimal powder content of UHPC is about 800 kg/m3
at the maximum size of basalt aggregate of 8 mm. The increase ratios of the compressive and
tensile splitting strengths of UHPC with different powder amounts by 2% of steel fiber are
between 13% and 19%, 95%, and 110%, respectively.

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