Optimising the Formulation and Properties of UHPC Material Based on Andreasen’s Model
- DOI
- 10.2991/978-94-6463-435-8_32How to use a DOI?
- Keywords
- Ultra-high performance concrete; Andreasen model; Mixing ratio design; Viscosity reduction optimisation
- Abstract
Ultra-High-Performance Concrete (UHPC) is widely utilized in the construction of critical structures due to its exceptional performance. Among its variations, RPC-type UHPC demonstrates robust mechanical and operational capabilities, but its high viscosity often necessitates its use in prefabricated components. Conversely, low-viscosity UHPC, characterized by its favourable flowability, is well-suited for on-site pouring. To enhance the performance of UHPC and develop low-viscosity formulations suitable for on-site pouring, the Andreasen model is employed for UHPC mix design, and the optimal mix ratio is determined through controlled experiments. Simultaneously, research is conducted to reduce the viscosity of UHPC through three approaches: optimizing the water to binder ratio, developing low-viscosity water-reducing agents, and utilizing shaped spherical aggregate particles. The experimental findings revealed that the optimal mix ratio for UHPC, providing its best performance, consists of 0.17 of the water to binder ratio, 840 kg/m3 of the cement, 187 kg/m3 of the silica fume, 93 kg/m3 of the fly ash, 1120 kg/m3 of the quartz sand, 157 kg/m3 of the steel fibres, and 7.1 kg/m3 of the water-reducing agent (45% solid content, 1.4% liquid content). Homemade nano-scale admixtures, shaped quartz sand aggregate, and specialized low-viscosity water-reducing agents notably reduce the viscosity of UHPC, with the homemade water-reducing agent exhibiting the most effective viscosity reduction. The prepared low-viscosity UHPC demonstrates working performance on par with C50 self-compacting concrete, achieving a compressive strength exceeding 120 MPa at 28 days, a flexural strength of over 20 MPa, and an elastic modulus surpassing 40 GPa. These research findings can serve as a valuable reference for the formulation and optimization of UHPC.
- Copyright
- © 2024 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.
Cite this article
TY - CONF AU - Zhaosheng Feng AU - Wei Huang AU - Haiao Zheng AU - Wen Liu PY - 2024 DA - 2024/06/13 TI - Optimising the Formulation and Properties of UHPC Material Based on Andreasen’s Model BT - Proceedings of the 2024 5th International Conference on Civil, Architecture and Disaster Prevention and Control (CADPC 2024) PB - Atlantis Press SP - 281 EP - 294 SN - 2589-4943 UR - https://doi.org/10.2991/978-94-6463-435-8_32 DO - 10.2991/978-94-6463-435-8_32 ID - Feng2024 ER -