再生微粉对超高性能混凝土力学性能和微观结构的影响

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发布时间：2020-01-06 00:00:00

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再生微粉对超高性能混凝土力学性能和微观结构的影响

Effect of Hybrid Recycled Powder on Mechanical Properties and Microstructure of Ultra-high Performance Concrete

2021年第5期

再生微粉；超高性能混凝土；强度；微观结构；纳米压痕；混凝土粉；砖粉

Hybrid recycled powder; Ultra-high performance concrete; Strength; Microstructure; Nanoindentation; Concrete powder; Brick powder

2021年第5期

10.19761/j.1000-4637.2021.05.085.06

浙江省自然科学基金项目（LY20E020006）；国家自然科学基金青年科学项目（51602198）；绍兴文理学院-西班牙加泰罗尼亚理工大学国际科技合作项目（2019LGGH1009）；国家级大学生创新创业训练计划项目（202010349011）。

何智海1,2，张梦圆1，詹培敏3，杨一凡1，兰波1

1.绍兴文理学院土木工程学院，浙江绍兴 312000；2.浙江省岩石力学与地质灾害重点实验室，浙江绍兴 312000；3.同济大学先进土木工程材料教育部重点实验室，上海 201804

何智海1,2，张梦圆1，詹培敏3，杨一凡1，兰波1

何智海,张梦圆,詹培敏,等.再生微粉对超高性能混凝土力学性能和微观结构的影响[J].混凝土与水泥制品,2021(5):85-90.

HE Z H,ZHANG M Y,ZHAN P M,et al.Effect of Hybrid Recycled Powder on Mechanical Properties and Microstructure of Ultra-high Performance Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):85-90.

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摘要：研究了两种类型的再生微粉（混凝土粉和砖粉）取代部分硅灰对超高性能混凝土（Ultra-high Performance Concrete，UHPC）力学性能和微观结构的影响。结果表明：混凝土粉的掺入降低了UHPC的力学性能，而砖粉取代15%硅灰时，UHPC的28 d抗压强度和抗折强度分别达到了130 MPa和24 MPa，略高于基准组；相较于混凝土粉，在UHPC中掺入15%的砖粉能够优化混凝土的内部结构；砖粉良好的微集料填充作用和火山灰效应增强了界面过渡区的黏结性能和水化产物的纳观力学性能，从而改善UHPC的微观结构。 Abstract： The effect of replacing part of silica fume with two kinds of hybrid recycled powder (concrete powder and brick powder) on the mechanical properties and microstructure of ultra-high performance concrete (UHPC) was studied. The results show that the addition of concrete powder reduces the mechanical properties of UHPC, while the 28 d compressive strength and flexural strength of UHPC reach 130 MPa and 24 MPa respectively when 15% silica fume is replaced by brick powder, which are slightly higher than those of the reference group. Compared with concrete powder, mixing 15% brick powder in UHPC can optimize the internal structure of concrete. The good micro-aggregate filling effect and pozzolanic properties of brick powder enhance the cohesiveness of the interface transition zone and the nanomechanical properties of the hydration products, thus improving the microstructure of UHPC.

英文名 : Effect of Hybrid Recycled Powder on Mechanical Properties and Microstructure of Ultra-high Performance Concrete

刊期 : 2021年第5期

关键词 : 再生微粉；超高性能混凝土；强度；微观结构；纳米压痕；混凝土粉；砖粉

Key words : Hybrid recycled powder; Ultra-high performance concrete; Strength; Microstructure; Nanoindentation; Concrete powder; Brick powder

刊期 : 2021年第5期

DOI : 10.19761/j.1000-4637.2021.05.085.06

文章编号 :

基金项目 : 浙江省自然科学基金项目（LY20E020006）；国家自然科学基金青年科学项目（51602198）；绍兴文理学院-西班牙加泰罗尼亚理工大学国际科技合作项目（2019LGGH1009）；国家级大学生创新创业训练计划项目（202010349011）。

作者 : 何智海1,2，张梦圆1，詹培敏3，杨一凡1，兰波1

单位 : 1.绍兴文理学院土木工程学院，浙江绍兴 312000；2.浙江省岩石力学与地质灾害重点实验室，浙江绍兴 312000；3.同济大学先进土木工程材料教育部重点实验室，上海 201804

何智海1,2，张梦圆1，詹培敏3，杨一凡1，兰波1

何智海,张梦圆,詹培敏,等.再生微粉对超高性能混凝土力学性能和微观结构的影响[J].混凝土与水泥制品,2021(5):85-90.

HE Z H,ZHANG M Y,ZHAN P M,et al.Effect of Hybrid Recycled Powder on Mechanical Properties and Microstructure of Ultra-high Performance Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):85-90.

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摘要

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参考文献

引用本文

Abstract： The effect of replacing part of silica fume with two kinds of hybrid recycled powder (concrete powder and brick powder) on the mechanical properties and microstructure of ultra-high performance concrete (UHPC) was studied. The results show that the addition of concrete powder reduces the mechanical properties of UHPC, while the 28 d compressive strength and flexural strength of UHPC reach 130 MPa and 24 MPa respectively when 15% silica fume is replaced by brick powder, which are slightly higher than those of the reference group. Compared with concrete powder, mixing 15% brick powder in UHPC can optimize the internal structure of concrete. The good micro-aggregate filling effect and pozzolanic properties of brick powder enhance the cohesiveness of the interface transition zone and the nanomechanical properties of the hydration products, thus improving the microstructure of UHPC.

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再生微粉对超高性能混凝土力学性能和微观结构的影响

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