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- W4289929461 abstract "Ultra-high Performance Concrete (UHPC) is a kind of advanced cement-based material normally designed based on particle close packing model, such as modified Andreasen and Andersen model. However, in the utilization of this model, some key parameters have not been deeply understood. Therefore, in this research, the multiple effect of typical parameters ( q value and D max ) on the properties of UHPC are clearly clarified based on mechanical property evaluation, wet packing density, low-field NMR and X-ray Computed tomography (X-CT). The obtained results show that when different maximum particle sizes are chosen, there is an optimized q value to develop UHPC ( q 0.17 for D max 1.25 mm; q 0.23 for D max 2.19 mm; q 0.25 for D max 4.36 mm; q 0.25 for D max 6.61 mm) with the lowest porosity and largest strength. Comprehensively consider the performance of UHPC, the suggested D max should be 2.19 mm, while the chosen q value is 0.23. At last, stereological theory is employed to get the quantity distribution of aggregates, and the aggregate particles random packing model is established to visualize the real aggregate particles packing in UHPC. And a new design concept for UHPC mix proportion design is provided." @default.
- W4289929461 created "2022-08-06" @default.
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- W4289929461 date "2022-10-01" @default.
- W4289929461 modified "2023-09-29" @default.
- W4289929461 title "Multiple effects of particle size distribution modulus (q) and maximum aggregate size (Dmax) on the characteristics of Ultra-High Performance concrete (UHPC): Experiments and modeling" @default.
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- W4289929461 doi "https://doi.org/10.1016/j.cemconcomp.2022.104709" @default.
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