Mechanical properties and microstructure of ultra-high performance concrete with low cement content

ZHANG ji-song; ZHAO Ying-hua; JIANG zhi-xin

doi:10.16411/j.cnki.issn1006-7736.2017.02.019

Journal of Dalian Maritime University >

2017 , Vol. 43 >Issue 2: 123 - 128

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2017.02.019

Mechanical properties and microstructure of ultra-high performance concrete with low cement content

ZHANG ji-song ,
ZHAO Ying-hua ,
JIANG zhi-xin

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( Institute of Road and Bridge Engineering, Dalian Maritime University, Dalian 116026, China)

Received date: 2016-09-05

Revised date: 2016-10-26

Online published: 2016-10-27

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Abstract

To minimize the cement amount in ultra-high performance concrete (UHPC) and design a kind of more “green” concrete, this paper investigated the workability, mechanical properties and microstructure of UHPC with various supplementary cementitious materials (SCMs) composed of limestone powder (LSP), silica fume (SF), rice husk ash (RHA) and kaoline (KL) in different proportions. Results indicate that the mixture with cement replacement up to 50% exhibits equivalent compressive strength as compared with reference sample, and for similar chemical composition, the fineness of RHA has a significant effect on the mechanical properties of UHPC. The equivalent factor (k-value) of various SCMs was calculated based on experimental result. Furthermore, the suitable proportions of these materials in UHPC for optimum mechanical properties were provided.

Key words： ultra-high performance concrete(UHPC); supplementary cementitious materials; mechanical properties; microstructure

Cite this article

ZHANG ji-song , ZHAO Ying-hua , JIANG zhi-xin . Mechanical properties and microstructure of ultra-high performance concrete with low cement content[J]. Journal of Dalian Maritime University, 2017 , 43(2) : 123 -128 . DOI: 10.16411/j.cnki.issn1006-7736.2017.02.019

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