搅拌工艺对超高性能混凝土工作性和力学性能的影响

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发布时间：2020-01-06 00:00:00

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搅拌工艺对超高性能混凝土工作性和力学性能的影响

Influence of Mixing Technology on the Workability and Mechanical Properties of Ultra-high Performance Concrete

2022年第8期

超高性能混凝土；搅拌工艺；工作性；力学性能；离散程度

Ultra-high performance concrete; Mixing technology; Workability; Mechanical property; Dispersion degree

2022年第8期

10.19761/j.1000-4637.2022.08.016.06

王启睿1，贺永胜1，谢晓庚2，田月强3，刘恩来1

1.军事科学院国防工程研究院，河南洛阳471023；2.华南理工大学材料科学与工程学院，广东广州510641；3.广东中路防护工程有限公司，广东广州510640

王启睿1，贺永胜1，谢晓庚2，田月强3，刘恩来1

王启睿,贺永胜,谢晓庚,等.搅拌工艺对超高性能混凝土工作性和力学性能的影响[J].混凝土与水泥制品,2022(8):16-21.

WANG Q R,HE Y S,XIE X G.Influence of Mixing Technology on the Workability and Mechanical Properties of Ultra-high Performance Concrete[J].China Concrete and Cement Products,2022(8):16-21.

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1000

摘要：设计了3种超高性能混凝土（UHPC）搅拌工艺，每种工艺各进行10组平行试验，测试了UHPC的坍落度、坍落扩展度、抗压强度和抗折强度，探讨了不同工艺对UHPC性能的影响，分析并评价了不同工艺下UHPC性能指标的离散性。结果表明，采用细骨料预先分散钢纤维的方法（工艺Ⅱ）有助于提升UHPC的抗折强度，所制备的UHPC坍落扩展度标准偏差最小；采用干混料制备的UHPC（工艺Ⅲ）抗压强度和抗折强度的标准偏差最小；宜采用工艺Ⅱ和工艺Ⅲ制备UHPC。 Abstract: Three mixing technology were designed to simplify the mixing procedure of ultra-high performance concrete (UHPC) with stable performance. For each mixing technology, ten parallel tests were carried out for testing the slump and flow of UHPC, as well as the compressive and flexural strength of UHPC. The effects of mixing technology on the workability and mechanical properties of UHPC were discussed, and then the dispersion degree of test data was analyzed. The results indicate that the method considering steel fiber pre-dispersed by fine aggregates (method Ⅱ) proves beneficial to enhance flexural strength of UHPC and results in the lowest standard deviation of slump flow of fresh UHPC. Moreover, UHPC prepared using dry blend mixed with designed dosage of water (method Ⅲ) shows a lowest standard deviation of compressive and flexural strength, compared with other mixing technology. In conclusion, method Ⅱ and method Ⅲ are suitable for preparation of UHPC.

英文名 : Influence of Mixing Technology on the Workability and Mechanical Properties of Ultra-high Performance Concrete

刊期 : 2022年第8期

关键词 : 超高性能混凝土；搅拌工艺；工作性；力学性能；离散程度

Key words : Ultra-high performance concrete; Mixing technology; Workability; Mechanical property; Dispersion degree

刊期 : 2022年第8期

DOI : 10.19761/j.1000-4637.2022.08.016.06

文章编号 :

基金项目 :

作者 : 王启睿1，贺永胜1，谢晓庚2，田月强3，刘恩来1

单位 : 1.军事科学院国防工程研究院，河南洛阳471023；2.华南理工大学材料科学与工程学院，广东广州510641；3.广东中路防护工程有限公司，广东广州510640

王启睿1，贺永胜1，谢晓庚2，田月强3，刘恩来1

王启睿,贺永胜,谢晓庚,等.搅拌工艺对超高性能混凝土工作性和力学性能的影响[J].混凝土与水泥制品,2022(8):16-21.

WANG Q R,HE Y S,XIE X G.Influence of Mixing Technology on the Workability and Mechanical Properties of Ultra-high Performance Concrete[J].China Concrete and Cement Products,2022(8):16-21.

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摘要

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结论

参考文献

引用本文

Abstract: Three mixing technology were designed to simplify the mixing procedure of ultra-high performance concrete (UHPC) with stable performance. For each mixing technology, ten parallel tests were carried out for testing the slump and flow of UHPC, as well as the compressive and flexural strength of UHPC. The effects of mixing technology on the workability and mechanical properties of UHPC were discussed, and then the dispersion degree of test data was analyzed. The results indicate that the method considering steel fiber pre-dispersed by fine aggregates (method Ⅱ) proves beneficial to enhance flexural strength of UHPC and results in the lowest standard deviation of slump flow of fresh UHPC. Moreover, UHPC prepared using dry blend mixed with designed dosage of water (method Ⅲ) shows a lowest standard deviation of compressive and flexural strength, compared with other mixing technology. In conclusion, method Ⅱ and method Ⅲ are suitable for preparation of UHPC.

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搅拌工艺对超高性能混凝土工作性和力学 性能的影响

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搅拌工艺对超高性能混凝土工作性和力学性能的影响