Elucidating the role of particle packing on drying shrinkage behavior of ultra-high performance concrete (UHPC)
Year: 2025
Type: article
Abstract: Ultra-High Performance Concrete (UHPC) is prone to significant drying shrinkage due to its high binder content and low water-binder ratio. Microstructural refinement through particle packing can mitigate this issue. This study investigates the role of “Particle Packing Factor” (PPF) - a novel design metric, in controlling drying shrinkage across 19 UHPC formulations with varying binder contents (630–1575 kg/m3), incorporating fly ash (0–35%), slag (0–50%), and silica fume (0–25%). Porosity refinement led to 51% reduction in drying shrinkage at 28 days (990 µξ to 480 µξ) and a 42% reduction at 91 days (1032 µξ to 600 µξ). Strong correlations were observed between PPF and drying shrinkage (R2 = 0.86–0.92) as well as PPF and open porosity (R2 = 0.79–0.84), underscoring the role of particle packing in reducing shrinkage. These findings establish PPF as a powerful metric for optimizing UHPC formulations to minimize long-term shrinkage.
Source: Figshare
Authors: Baten, Bayezid, Garg, Nishant
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6902296838
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