Evaluation and optimization of Ultra-High Performance Concrete (UHPC) subjected to harsh ocean environment: Towards an application of Layered Double Hydroxides (LDHs)

被引：96
作者：
Chen, Yuxuan [1 ,2 ]
Yu, Rui [1 ]
Wang, Xinpeng [1 ,2 ]
Chen, Jie [1 ,2 ]
Shui, Zhonghe [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China
[2] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 177卷
关键词：
Ultra-High Performance Concrete (UHPC); Layered Double Hydroxides (LDHs); Chloride binding capacity; Porosity; Andersen & Andreasen packing model; SELF-COMPACTING CONCRETE; CHLORIDE BINDING; SULFOALUMINATE CEMENT; THERMAL-ANALYSIS; NANO-SILICA; FLY-ASH; DURABILITY; HYDRATION; MICROSTRUCTURE; RESISTANCE;
D O I：
10.1016/j.conbuildmat.2018.03.210
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this study, the feasibility of improving the durability of Ultra-High Performance Concrete (UHPC) by incorporating calcined Layered Double Hydroxides (C-LDHs) was investigated. The spread flow, air content, permeable porosity, compressive strength, and durability of the designed UHPC were evaluated. Furthermore, the influence of C-LDHs on cement hydration and microstructure of the designed UHPC were studied. Experimental results indicated the incorporation of 1% C-LDHs improved durability of UHPC in chloride and sulfate environment, with compressive strength enhanced simultaneously. The chloride binding capacity of C-LDHs is far better than that of cement, fly ash and silica fume, reaching a chloride absorbance of 3.28 mg/g. Therefore, C-LDHs is a functional anions absorbent materials in UHPC system, which is promising in the currently critical components of offshore buildings and structures. (C) 2018 Elsevier Ltd. All rights reserved.
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页码：51 / 62
页数：12
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