Research on The Effect of External Admixture on The Micro-structure and Performance of Concrete under The Plateau Conditions

DOI

10.2991/978-94-6463-688-8_31How to use a DOI?

Keywords

low air pressure; external admixture; mechanical properties; durability; microstructure

Abstract

In order to satisfy the requirements of the complex environment of plateau on the use of concrete mechanical properties and durability performance, this paper designed three different mix-ratio concretes of 30% fly ash, 30% fly ash + 5% silica fume slurry and 30% fly ash + liquid internal curing agent. And analyzed the change rule of concrete compressive strength, shrinkage, impermeability and microscopic properties. The results showed that the 56d compressive strength of concrete with 5% silica fume slurry and internal curing agent decreased by 3.2% and 4.0%, respectively, compared with 30% fly ash alone, while the internal curing agent improved the early shrinkage of the concrete. 30% fly ash + 5% silica fume slurry ratio of concrete better improved the pore structure, morphology, physical composition, and seepage resistance of the concrete. Finally, based on the entropy weighting method, the performance of concrete under the three ratios was evaluated comprehensively, and 30% fly ash + 5% silica fume slurry was obtained as the optimal ratio, and it is recommended that fly ash + silica fume slurry be added to improve the working performance of the concrete and prolong its service life in the plateau environment.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Yaqiang Yue
AU  - Qicai Wang
AU  - Chao Xie
AU  - Guowei Jin
AU  - Xiaoyong Wang
PY  - 2025
DA  - 2025/04/30
TI  - Research on The Effect of External Admixture on The Micro-structure and Performance of Concrete under The Plateau Conditions
BT  - Proceedings of the 2024 6th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2024)
PB  - Atlantis Press
SP  - 301
EP  - 315
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-688-8_31
DO  - 10.2991/978-94-6463-688-8_31
ID  - Yue2025
ER  -