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

Chen Yuxuan; Yu Rui; Wang Xinpeng; Chen Jie; Shui Zhonghe

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

机译：海洋环境下超高性能混凝土（UHPC）的评估和优化：层状双氢氧化物（LDHs）的应用

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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.

机译：在这项研究中，研究了通过掺入煅烧层状双氢氧化物（C-LDHs）来提高超高性能混凝土（UHPC）耐久性的可行性。对设计的UHPC的扩散流，空气含量，可渗透孔隙率，抗压强度和耐久性进行了评估。此外，研究了C-LDHs对所设计UHPC水泥水化和微观结构的影响。实验结果表明，掺入1％C-LDHs可改善UHPC在氯化物和硫酸盐环境中的耐久性，同时提高抗压强度。 C-LDHs的氯离子结合能力远优于水泥，粉煤灰和硅粉，其氯离子吸收率为3.28 mg / g。因此，C-LDHs是UHPC系统中的功能性阴离子吸收材料，在海上建筑物和结构的当前关键组件中很有希望。（C）2018 Elsevier Ltd.保留所有权利。

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来源
《Construction and Building Materials》 |2018年第20期|51-62|共12页
作者
Chen Yuxuan; Yu Rui; Wang Xinpeng; Chen Jie; Shui Zhonghe;
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作者单位

Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China;

Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China;

Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China;

Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China;

Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Ultra-High Performance Concrete (UHPC); Layered Double Hydroxides (LDHs); Chloride binding capacity; Porosity; Andersen Andreasen packing model;

机译：超高性能混凝土（UHPC）;双层双氢氧化物（LDHs）;氯离子结合力;孔隙率;Andersen＆Andreasen填料模型;

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1. A new development of eco-friendly Ultra-High performance concrete (UHPC): Towards efficient steel slag application and multi-objective optimization [J] . Fan Dingqiang, Yu Rui, Shui Zhonghe, Construction and Building Materials . 2021,第Nova1期

机译：ECO友好的超高性能混凝土（UHPC）的新开发：迈向高效的钢渣应用和多目标优化
2. Optimized design of steel fibres reinforced ultra-high performance concrete (UHPC) composites: Towards to dense structure and efficient fibre application [J] . Fan Dingqiang, Rui Yu, Liu Kangning, Construction and Building Materials . 2021,第Mara1期

机译：钢纤维优化设计增强超高性能混凝土（UHPC）复合材料：朝向密集结构和高效纤维应用
3. Optimization of autogenous shrinkage and microstructure for Ultra-High Performance Concrete (UHPC) based on appropriate application of porous pumice [J] . Liu Kaizhi, Yu Rui, Shui Zhonghe, Construction and Building Materials . 2019,第JULa30期

机译：基于多孔浮石的应用优化超高性能混凝土的自生收缩和组织
4. Biological Evaluation of a Novel Tissue Engineering Scaffold of Layered Double Hydroxides (LDHs) [C] . Fateme Fayyazbakhsh, Mehran Solati-Hashjin, M.A. Shokrgozar, International Society for Ceramics in Medicine. . 2012

机译：分层双氢氧化物新型组织工程支架的生物学评价（LDHS）
5. Part I. Layered double hydroxides (LDHs): Organic anion exchange reactions, synthesis of microporous pillared derivatives and surface chemistry of metal carbonyl clusters. Part II. On the nature of titania pillared layered silicate clays. [D] . Dimotakis, Emmanuel Dimitrios. 1991

机译：第一部分：层状双氢氧化物（LDHs）：有机阴离子交换反应，微孔柱状衍生物的合成和羰基金属簇的表面化学。第二部分在二氧化钛的性质上有柱状层状硅酸盐粘土。
6. Use of ZnAl-Layered Double Hydroxide (LDH) to Extend the Service Life of Reinforced Concrete [O] . Celestino Gomes, Zahid Mir, Rui Sampaio, 2020

机译：ZnAl层状双氢氧化物（LDH）的使用可延长钢筋混凝土的使用寿命
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

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

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