Effect of Aggregate and Fiber on High Temperature Performance of Ultra-High Performance Concrete

DOI

10.2991/978-94-6463-726-7_42How to use a DOI?

Keywords

High temperature performance; UHPC; Compressive strength; Aluminate cement Sintered bauxite sand; quartz sand; steel fiber; PVA fibers

Abstract

This study examines the high-temperature behavior of ultra-high-performance concrete (UHPC) formulated with aluminate cement and various fiber and aggregate combinations. Key performance metrics, including compressive strength, mass loss, hydration characteristics, porosity, and micro-structural changes, were evaluated across a temperature range of 200 ℃ to 1000 ℃. The developed aluminate cement-based UHPC exhibited stable strength development over time. Under high-temperature exposure, UHPC containing sintered bauxite sand demonstrated superior resistance to surface cracking and lower mass loss than UHPC with quartz sand. Compressive strength increased at 200 ℃ due to continued hydration and crystallization but declined significantly at higher temperatures due to dehydration and structural cracking. XRD and DSC analyses identified temperature-dependent phase transformations, leading to mass loss and strength reduction. SEM and porosity analyses revealed microstructural changes, including fiber degradation and pore expansion, particularly beyond 800 ℃. The results indicate that UHPC formulations combining both sintered bauxite sand and quartz sand with steel and PVA fibers exhibit improved high-temperature resistance.

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  - Min Xiao
AU  - Jianqin Li
AU  - Fucai Liu
AU  - Hui Wang
AU  - Yifei Jiao
PY  - 2025
DA  - 2025/06/13
TI  - Effect of Aggregate and Fiber on High Temperature Performance of Ultra-High Performance Concrete
BT  - Proceedings of the 2024 6th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2024)
PB  - Atlantis Press
SP  - 434
EP  - 446
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-726-7_42
DO  - 10.2991/978-94-6463-726-7_42
ID  - Xiao2025
ER  -