Silva Mariana Lage da, Prado Lisiane Pereira, Félix Emerson Felipe, Sousa Alex Micael Dantas de, Aquino Davi Peretta
Department of Civil Engineering, School of Science and Engineering, São Paulo State University (UNESP), Guaratinguetá 12516-410, SP, Brazil.
Department of Civil Engineering, School of Engineering, São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil.
Materials (Basel). 2024 Apr 14;17(8):1801. doi: 10.3390/ma17081801.
Ultra-high-performance concrete (UHPC) is a cementitious composite combining high-strength concrete matrix and fiber reinforcement. Standing out for its excellent mechanical properties and durability, this material has been widely recognized as a viable choice for highly complex engineering projects. This paper proposes (i) the review of the influence exerted by the constituent materials on the mechanical properties of compressive strength, flexural tensile strength, and elastic modulus of UHPC and (ii) the determination of optimal quantities of the constituent materials based on simplified statistical analyses of the developed database. The data search was restricted to papers that produced UHPC with straight steel fibers at a content of 2% by volume. UHPC mixture models were proposed based on graphical analyses of the relationship of constituent materials versus mechanical properties, aiming to optimize the material's performance for each mechanical property. The results proved to be in accordance with the specifications present in the literature, characterized by high cement consumption, significant presence of fine materials, and low water-to-binder ratio. The divergences identified between the mixtures reflect how the constituent materials uniquely impact each mechanical property of the concrete. In general, fine materials were shown to play a significant role in increasing the compressive strength and flexural tensile strength of UHPC, while water and superplasticizers stood out for their influence on the material's workability.
超高性能混凝土（UHPC）是一种将高强度混凝土基体与纤维增强材料相结合的胶凝复合材料。这种材料以其优异的力学性能和耐久性脱颖而出，已被广泛认可为高度复杂工程项目的可行选择。本文提出：（i）回顾组成材料对UHPC抗压强度、抗弯拉强度和弹性模量等力学性能的影响；（ii）基于对所建立数据库的简化统计分析确定组成材料的最佳用量。数据搜索仅限于那些生产体积含量为2%直钢纤维UHPC的论文。基于组成材料与力学性能关系的图形分析，提出了UHPC混合料模型，旨在针对每种力学性能优化材料性能。结果证明与文献中的规范一致，其特点是水泥用量高、细料含量大、水胶比低。混合料之间发现的差异反映了组成材料如何独特地影响混凝土的每种力学性能。一般来说，细料在提高UHPC抗压强度和抗弯拉强度方面发挥了重要作用，而水和高效减水剂因其对材料工作性的影响而突出。
