Study on performance improvement of ultra-high performance concrete by vibration mixing

Y Zheng, Y Zhou, X Huang, Y Min, H Luo… - … and Building Materials, 2022 - Elsevier
Y Zheng, Y Zhou, X Huang, Y Min, H Luo, Y Chen, W Li
Construction and Building Materials, 2022Elsevier
Ultra-high performance concrete (UHPC), as a new cement-based material, has attracted
much attention. In this paper, UHPC was prepared based on ordinary mixing and vibration
mixing respectively. The mechanical and durability properties and microstructure of the two
methods were compared. The results illustrate that UHPC based on vibration mixing
technology has faster strength growth rate and higher compressive strength, splitting
compressive strength and tensile strength at the 28d, compared with ordinary mixing UHPC; …
Ultra-high performance concrete (UHPC), as a new cement-based material, has attracted much attention. In this paper, UHPC was prepared based on ordinary mixing and vibration mixing respectively. The mechanical and durability properties and microstructure of the two methods were compared. The results illustrate that UHPC based on vibration mixing technology has faster strength growth rate and higher compressive strength, splitting compressive strength and tensile strength at the 28d, compared with ordinary mixing UHPC; It is found that the performance of UHPC based on vibration mixing technology is better. Different microanalysis techniques show that UHPC based on vibration mixing technology has higher hydration degree, more uniform cement particles and lower porosity. Overall, vibratory mixing is a combination of vibratory mixing and forced mixing, which is able to exploit the advantages of both in UHPC mixing area, and it can be used to reduce cement usage and reduce C O 2 emissions in the future.
Elsevier
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