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超高性能混凝土的流变性能及其应用研究进展
Research progress on rheological properties of ultra-high performance concrete(UHPC) and its application
2024年第4期
超高性能混凝土;流变性能;应用;屈服应力;黏度
Ultra-high performance concrete(UHPC); Rheological property; Application; Yield stress; Viscosity
2024年第4期
10.19761/j.1000-4637.2024.04.021.06
上海市科技委员会2021年度科技创新行动计划项目(21DZ1202804);上海城投集团2023年科技创新计划项目(CTKY-CYHYD-2023-005)。
张国芳1,2,3,胡文佩1,2,3,*
1.上海市市政规划设计研究院有限公司,上海 200031;2.上海城投城市发展研究院有限公司,上海 200031;3.上海城市路域生态工程技术研究中心,上海 200031

张国芳1,2,3,胡文佩1,2,3,*

张国芳,胡文佩.超高性能混凝土的流变性能及其应用研究进展[J].混凝土与水泥制品,2024(4):21-25,30.

ZHANG G F,HU W P.Research progress on rheological properties of ultra-high performance concrete(UHPC) and its application[J].China Concrete and Cement Products,2024(4):21-25,30.

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摘   要:综述了各种组成材料(水泥、矿物掺合料及纳米材料、骨料、纤维、外加剂)对超高性能混凝土(UHPC)流变性能的影响,并分析了UHPC在桥面铺装、预制拼装连接、预制构件、喷射加固修复、3D打印等不同应用领域下流变性能的要求,同时提出了改善UHPC流变性能的方法。 Abstract: The effects of various constituent materials(cement, mineral admixtures and nanomaterials, aggregates, fibers, additives) on the rheological properties of ultra-high performance concrete(UHPC) are summarized. The rheological performance requirements of UHPC in different application scenarios such as bridge deck paving, prefabricated assembly connections, prefabricated components, spray reinforcement repair, 3D printing are analyzed, and the methods to improve the rheological properties of UHPC are proposed.
英文名 : Research progress on rheological properties of ultra-high performance concrete(UHPC) and its application
刊期 : 2024年第4期
关键词 : 超高性能混凝土;流变性能;应用;屈服应力;黏度
Key words : Ultra-high performance concrete(UHPC); Rheological property; Application; Yield stress; Viscosity
刊期 : 2024年第4期
DOI : 10.19761/j.1000-4637.2024.04.021.06
文章编号 :
基金项目 : 上海市科技委员会2021年度科技创新行动计划项目(21DZ1202804);上海城投集团2023年科技创新计划项目(CTKY-CYHYD-2023-005)。
作者 : 张国芳1,2,3,胡文佩1,2,3,*
单位 : 1.上海市市政规划设计研究院有限公司,上海 200031;2.上海城投城市发展研究院有限公司,上海 200031;3.上海城市路域生态工程技术研究中心,上海 200031

张国芳1,2,3,胡文佩1,2,3,*

张国芳,胡文佩.超高性能混凝土的流变性能及其应用研究进展[J].混凝土与水泥制品,2024(4):21-25,30.

ZHANG G F,HU W P.Research progress on rheological properties of ultra-high performance concrete(UHPC) and its application[J].China Concrete and Cement Products,2024(4):21-25,30.

摘要
参数
结论
参考文献
引用本文

摘   要:综述了各种组成材料(水泥、矿物掺合料及纳米材料、骨料、纤维、外加剂)对超高性能混凝土(UHPC)流变性能的影响,并分析了UHPC在桥面铺装、预制拼装连接、预制构件、喷射加固修复、3D打印等不同应用领域下流变性能的要求,同时提出了改善UHPC流变性能的方法。

Abstract: The effects of various constituent materials(cement, mineral admixtures and nanomaterials, aggregates, fibers, additives) on the rheological properties of ultra-high performance concrete(UHPC) are summarized. The rheological performance requirements of UHPC in different application scenarios such as bridge deck paving, prefabricated assembly connections, prefabricated components, spray reinforcement repair, 3D printing are analyzed, and the methods to improve the rheological properties of UHPC are proposed.

关键词:
uhpc
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性能
of
rheological
are
3d
流变
材料
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(1)UHPC原材料的成分、细度、掺量均会对流变性能产生较大影响。其中,胶凝材料对UHPC的流变性能的影响相对较大,纳米材料的掺入在增加堆积密度的同时也会导致屈服应力、黏度的降低;骨料的连续级配和最大粒径的增加会导致流变性能降低;纤维的类型、掺量、形状、长径比、分布情况均会影响流变性能;外加剂是调节UHPC流变性能的重要手段,但当几种外加剂同时用于UHPC时,需考虑彼此的相容性与协同效果。
(2)不同应用领域对UHPC流变性能的要求不同,满足流变性能要求才能获得良好的施工性能。当UHPC用于修复加固和连接时,应具有较低的屈服应力和较高的黏度,以提高强度和稳定性;当UHPC作为喷射混凝土使用时,应具有较高的黏度和触变性,以黏附在基材上不垂挂;当UHPC应用于预制构件时,应具有较低的屈服应力和适宜的黏度,以提高浇注密实性,改善纤维分布,提高拉伸和弯曲性能;当UHPC用于3D打印时,应具有相对较低的初始屈服应力,以改善可挤出性,层层堆积后,还需保证强度的快速发展,不坍塌。
(3)UHPC的流变性能越来越受到关注,相关研究也越来越多,但如何将研究成果应用于实际工程施工中,还需要更多的实践。目前施工中,大多还是用流动度或扩展度来评价UHPC的施工性能,具有一定的局限性,需要开发简单实用的流变性能测试方法,从而更好地指导UHPC施工。同时,需要深入研究UHPC各组分原材料对流变性能的影响,不断调节优化配合比,实现UHPC施工性能的契合,推动UHPC的产业化发展。

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张国芳,胡文佩.超高性能混凝土的流变性能及其应用研究进展[J].混凝土与水泥制品,2024(4):21-25,30.

ZHANG G F,HU W P.Research progress on rheological properties of ultra-high performance concrete(UHPC) and its application[J].China Concrete and Cement Products,2024(4):21-25,30.

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