硅质SCMs改性水泥浆的热研究贡献

Q4 Materials Science

International Journal of Microstructure and Materials Properties Pub Date : 2019-04-06 DOI:10.1504/IJMMP.2019.10020469

K. Arroudj, M. N. Oudjit, A. Tagnit-Hamou

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引用次数: 0

摘要

本研究旨在突出阿尔及利亚可用的硅质添加剂:与硅灰“SF”相比，磨碎的高炉渣“S”和沙丘砂或石英“Q”。通过热分析(差热与热重分析-DTA/TG)监测替代15%添加剂改性水泥浆的水化，量化添加剂消耗的波特兰石、结合水“Wn”和水化程度随时间的变化。本研究的结果证实并补充了前人的研究结果:与SF和S相比，石英的火山灰活性较低，这是由于在水泥水化过程中释放的波特兰石被消耗。本研究通过对具有相同替换水平的超高性能混凝土(UHPC)进行力学试验来完成。新一代的可持续和生态混凝土是基于当地材料获得的。

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Contribution to thermal study of modified cement pastes based on siliceous SCMs

This study aims to highlight siliceous additive available in Algeria: ground blast furnace slag 'S' and dune sand or Quartz 'Q' compared to silica fume 'SF'. Monitoring the hydration of cement pastes modified by replacing 15% additive by thermal analysis (Differential thermal and thermo gravimetric analysis -DTA/TG) quantifies the Portlandite consumed by the additive, the combined water 'Wn' and the degree of hydration as function of time. The results of this study confirm and complement those found in previous research: compared to SF and S, quartz has a low pozzolanic activity resulted in consumption of Portlandite released during cement hydration. This study is completed by mechanical tests on ultra high performance concrete (UHPC), with a same level of replacement. A new generation of sustainable and eco-concrete is obtained based on local materials.

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来源期刊

International Journal of Microstructure and Materials Properties Materials Science-Materials Science (all)

CiteScore

0.70

自引率

0.00%

发文量

期刊介绍： IJMMP publishes contributions on mechanical, electrical, magnetic and optical properties of metal, ceramic and polymeric materials in terms of the crystal structure and microstructure. Papers treat all aspects of materials, i.e., their selection, characterisation, transformation, modification, testing, and evaluation in the decision-making phase of product design/manufacture. Contributions in the fields of product, design and improvement of material properties in various production processes are welcome, along with scientific papers on new technologies, processes and materials, and on the modelling of processes.