低水泥用量超高性能混凝土力学性能及微结构试验

张吉松; 赵颖华; 蒋治鑫

doi:10.16411/j.cnki.issn1006-7736.2017.02.019

大连海事大学学报 >

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

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

交通运输工程

低水泥用量超高性能混凝土力学性能及微结构试验

张吉松 ,
赵颖华 ,
蒋治鑫

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(大连海事大学道路与桥梁工程研究所，辽宁大连 116026)

张吉松(1983 — )，男，博士生，工程师.赵颖华*(1954 — )，女，博士，教授，博士生导师，E-mail：yhzhao@dlmu.edu.cn．

收稿日期: 2016-09-05

修回日期: 2016-10-26

网络出版日期: 2016-10-27

基金资助

国家自然科学基金资助项目(51178068)．

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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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摘要

为降低超高性能混凝土中的水泥用量，研制绿色低碳的超高性能混凝土，采用石灰、硅灰、稻壳灰和高岭土以不同比例组合作为替代水泥材料，研究了其和易性、力学性能和微观结构.结果表明，替代水泥比例高达50 %的超高性能混凝土试件，其力学性能与未替换水泥试件相当；同样化学组成的稻壳灰，其细度对超高性能混凝土试件的力学性能影响较大.通过试验结果计算出各种替代材料混掺的等效系数(k-value)，给出了力学性能最优的低水泥用量超高性能混凝土的配合比例.

关键词： 超高性能混凝土（UHPC）; 替代水泥材料; 力学性能; 微观结构

本文引用格式

张吉松 , 赵颖华 , 蒋治鑫 . 低水泥用量超高性能混凝土力学性能及微结构试验[J]. 大连海事大学学报, 2017 , 43(2) : 123 -128 . DOI: 10.16411/j.cnki.issn1006-7736.2017.02.019

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

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