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含钢纤维和聚乙烯醇纤维的超高性能混凝土的力学性能

Mechanical Properties of Ultra-High-Performance Concrete with Steel and PVA Fibers.

作者信息

Jacintho Ana Elisabete P G A, Santos André M Dos, Santos Junior Gilvan B, Krahl Pablo A, Barbante Grazielle G, Pimentel Lia L, Forti Nádia C S

机构信息

Urban Infrastructure System Program, Pontifical Catholic University of Campinas (PUC-Campinas), Campinas 13086-099, Brazil.

Semi Árido Federal University, Mossoró 59625-900, Brazil.

出版信息

Materials (Basel). 2024 Dec 6;17(23):5990. doi: 10.3390/ma17235990.

DOI:10.3390/ma17235990
PMID:39685427
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11643637/
Abstract

Ultra-high-performance concrete (UHPC) has gained worldwide popularity due to its high mechanical performance. This research studied the influence of adding a mixture of two fibers (steel and PVA) on the compressive strength, modulus of elasticity, and flexural tensile strength of UHPC. The mixtures were prepared by adding steel fibers and PVA fibers using a standard procedure defined in the research, which is the time to mix the dry materials and the time to mix the admixture and water. The Central Composite Rotational Design (CCRD) methodology was used for the experimental design of the compressive strength and longitudinal deformation modulus tests. The results were analyzed using statistical software to investigate the influence of fibers on these two mechanical properties of UHPC. With this technique, an optimized design for the study of flexural tensile strength was arrived at. It was found that the standardized equations for the modulus of elasticity, directed to conventional concrete and high-strength concrete, are inadequate for estimating the modulus of UHPC in this research. Statistical analysis indicated that the range of fiber amounts analyzed did not significantly affect the compressive strength and modulus of elasticity. Regarding the optimized mixture, its flexural tensile strength indicated that the fiber content should be higher for UHPC to be suitable for structural use.

摘要

超高性能混凝土（UHPC）因其高力学性能而在全球范围内受到欢迎。本研究探讨了添加两种纤维（钢纤维和聚乙烯醇（PVA）纤维）的混合物对UHPC抗压强度、弹性模量和弯曲抗拉强度的影响。混合物通过按照研究中定义的标准程序添加钢纤维和PVA纤维来制备，该程序包括干料混合时间以及外加剂与水的混合时间。采用中心复合旋转设计（CCRD）方法进行抗压强度和纵向变形模量试验的实验设计。使用统计软件对结果进行分析，以研究纤维对UHPC这两种力学性能的影响。通过该技术，得出了弯曲抗拉强度研究的优化设计。研究发现，针对普通混凝土和高强度混凝土的弹性模量标准方程，不足以估算本研究中UHPC的弹性模量。统计分析表明，所分析的纤维用量范围对抗压强度和弹性模量没有显著影响。关于优化混合物，其弯曲抗拉强度表明，UHPC要适用于结构用途，纤维含量应更高。

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本文引用的文献

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Study of Ultra-High Performance Concrete Mechanical Behavior under High Temperatures.高温下超高性能混凝土力学性能研究
Materials (Basel). 2024 Aug 26;17(17):4212. doi: 10.3390/ma17174212.
2
Effect of Basalt/Steel Individual and Hybrid Fiber on Mechanical Properties and Microstructure of UHPC.玄武岩/钢单纤维及混杂纤维对超高性能混凝土力学性能和微观结构的影响
Materials (Basel). 2024 Jul 4;17(13):3299. doi: 10.3390/ma17133299.
3
Modulus and Strength of Concretes with Alternative Materials.使用替代材料的混凝土的模量和强度
Materials (Basel). 2020 Oct 1;13(19):4378. doi: 10.3390/ma13194378.