Abstract This study presents an optimized design method in developing ultra-high performance concrete (UHPC) with high wet packing density, in which the multiply effects of solid and liquid phases on UHPC packing mode are considered. Specifically, a model based on D-optimal method is firstly established to assess the influence of solid granular particles and superplasticizer (SP) on the UHPC packing density. Based on the theoretical analysis, the mixture proportions can be optimized, and UHPC with high wet packing density could be produced. Then, to evaluate the reliability of the math-physical method in developing UHPC, its compressive strength and pore structure are tested. The obtained experimental results show that the designed UHPC contributes high packing density, leading to optimized pore structure and extraordinary compressive strength. The experimental verification further highlights that D-optimal method is a promising and effective approach to design UHPC, and eventually for the development of sustainable UHPC.

中文翻译：

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具有高湿填充密度的超高性能混凝土 (UHPC) 的优化设计

摘要 本研究提出了一种开发具有高湿填充密度的超高性能混凝土（UHPC）的优化设计方法，其中考虑了固液相对UHPC填充模式的多重影响。具体而言，首先建立了基于D-最优方法的模型来评估固体颗粒和超塑化剂（SP）对UHPC堆积密度的影响。根据理论分析，可以优化混合比例，可以生产具有高湿填充密度的UHPC。然后，为了评估数学物理方法开发超高性能混凝土的可靠性，测试了其抗压强度和孔隙结构。获得的实验结果表明，所设计的 UHPC 有助于提高填充密度，从而优化孔隙结构和非凡的抗压强度。