New development of ultra-high-performance concrete (UHPC)
New development of ultra-high-performance concrete (UHPC)
复制标题
超高性能混凝土的新发展
DOI：
10.1016/j.compositesb.2021.109220
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发表时间：
2021-09-20
影响因子：
13.1
通讯作者：
Wang, Hao
中科院分区：
文献类型：
--
作者：
Du, Jiang;Meng, Weina;Wang, Hao
超高性能混凝土（UHPC）是一种水泥基复合材料，用于新建和/或修复现有结构，以延长使用寿命。与传统混凝土相比，UHPC具有上级的工作性、力学性能和耐久性。然而，一些挑战限制了UHPC的广泛应用，例如大批量生产的低和易性、高自收缩、弯曲/拉伸性能不足以及混凝土开裂后不可预测的耐久性。因此，本文综述了超高性能混凝土混合料的发展与性能改善的最新技术。本文综述了以下几个方面：（1）现有的设计方法;（2）典型的成分（例如，用于制备UHPC的粘合剂、骨料、化学外加剂和纤维）和基本工作原理;（3）用于改善和控制关键性能的技术（例如，可加工性、自生收缩、压缩性能、拉伸/弯曲性能和耐久性）;和（4）代表性的成功应用。本文的研究将有助于提高对超高性能混凝土的认识，促进超高性能混凝土的进一步研究和应用。
Ultra-high-performance concrete (UHPC) is a type of cement-based composite for new construction and/or restoration of existing structures to extend service life. UHPC features superior workability, mechanical properties, and durability compared with conventional concrete. However, some challenges limit the wider application of UHPC, such as low workability for large-volume production, high autogenous shrinkage, insufficient flexural/tensile properties, and unpredictable durability after concrete cracking. Therefore, this paper reviews the state-of-the-art technologies for developing UHPC mixtures with improved properties. This review covers the following aspects: (1) the existing design methodologies; (2) the typical ingredients (e.g., binders, aggregates, chemical admixtures, and fibers) for preparation of UHPC and the underlying working principals; (3) the technologies for improving and controlling key properties (e.g., workability, autogenous shrinkage, compressive performance, tensile/flexural properties, and durability); and (4) the representative successful applications. This review is expected to advance the fundamental knowledge of UHPC and promote further research and applications of UHPC.