期刊
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
卷 28, 期 1, 页码 -出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)MT.1943-5533.0001327
关键词
Ultrahigh-performance concrete (UHPC); Nano; nanolimestone/nanoCaCo(3); Hydration; Autogenous shrinkage; Microstructure
资金
- National Natural Science Foundation of China [51408210, 51378196, U1305243]
- Fundamental Research Funds for the Central Universities (Hunan University), P.R. China [531107040800]
- Australian Research Council [DE150101751]
The influence of nanolimestone/nanoCaCo(3) (NC) on the properties of ultrahigh-performance concrete (UHPC) cured at standard and heat conditions was experimentally investigated. The NC was used at ratios of 1, 2, and 3% as partial mass replacement for cement. Incorporating NC accelerated the hydration reactions of UHPC because of the nucleation effect. On the mechanical properties aspect, a threshold value of the NC content was found so that the compressive, flexural strengths, and flexural to compressive strength ratio of the UHPC were found to increase as the NC content increased towards the threshold content, and then to decrease with the increase of NC contents when the threshold was surpassed. Conversely, replacing cement with NC decreased flowability and increased the amount of autogenous shrinkage of the UHPC. While the NC accelerated the cement hydration process, it also acted as an effective filling material, resulting in enhanced mechanical properties and denser microstructure compared with the control UHPC mixture. Thus, through the use of NC, more environmentally friendly UHPC can be produced by reducing its cement factor and achieving enhanced engineering properties. (C) 2015 American Society of Civil Engineers.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据