含粗骨料UHPC的强度尺寸效应与性能研究_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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含粗骨料UHPC的强度尺寸效应与性能研究

Study on strength size effect and performance of UHPC with coarse aggregates

2024年第5期

含粗骨料超高性能混凝土；尺寸效应；钢纤维；减缩剂；收缩性能；力学性能；抗氯离子渗透性能

Ultra-high performance concrete with coarse aggregate; Size coefficient; Steel fiber; Shrinkage reducing agent; Shrinkage property; Mechanical property; Chloride ion penetration resistance

2024年第5期

10.19761/j.1000-4637.2024.05.051.06

中山市重大科技专项项目（20220506）。

王军，刘晓峰，陈镇衫，罗西，余辉，廖树基

明阳智慧能源集团股份公司，广东中山 528437

王军，刘晓峰，陈镇衫，罗西，余辉，廖树基

王军,刘晓峰,陈镇衫,等.含粗骨料UHPC的强度尺寸效应与性能研究[J].混凝土与水泥制品,2024(5):51-56.

WANG J,LIU X F,CHEN Z S,et al.Study on strength size effect and performance of UHPC with coarse aggregates[J].China Concrete and Cement Products,2024(5):51-56.

浏览量:

1000

摘要：研究了胶凝材料组成比例、钢纤维类型（平直型、端钩型）对含粗骨料超高性能混凝土（UHPC）强度尺寸效应、工作性和收缩性能的影响，分析了减缩剂掺量（0~2.0%）对含粗骨料UHPC收缩性能、力学性能、抗氯离子渗透性能和孔结构的影响。结果表明：适当增加粉煤灰掺量有利于改善含粗骨料UHPC的工作性，降低收缩；掺入钢纤维降低了含粗骨料UHPC的工作性，但抑制了收缩，且端钩型钢纤维抑制效果更显著；掺入1%钢纤维能够有效降低含粗骨料UHPC的强度尺寸效应，且平直型钢纤维的降低效果更好；掺入减缩剂明显降低了含粗骨料UHPC的收缩，但会使抗压强度降低，总孔隙率增大，抗氯离子渗透性能变差。 Abstract: The effects of the composition ratio of cementitious materials and the type of steel fibers (straight and end-hooked) on the strength size effect, workablity and shrinkage properties of ultra-high performance concrete (UHPC) with coarse aggregates were investigated, and the effects of the content of shrinkage reducing agent (0~2.0%) on the shrinkage properties, mechanical properties, chloride ion penetration resistance and pore structure of UHPC with coarse aggregates were analyzed. The results show that increasing the content of fly ash appropriately is conducive to improving the workability and reducing the shrinkage of UHPC with coarse aggregates. The addition of steel fibers reduces the workability of UHPC with coarse aggregates, but inhibits the shrinkage, and the suppression effect is more significant with end-hooked steel fibers. Adding 1% content of steel fibers effectively reduces the strength size effect of UHPC with coarse aggregates, and the reduction effect of the straight steel fibers is better. The addition of shrinkage reducing agent obviously reduces the shrinkage of UHPC with coarse aggregates, but reduces the compressive strength, increases the total porosity, and deteriorates the chloride ion penetration resistance.

英文名 : Study on strength size effect and performance of UHPC with coarse aggregates

刊期 : 2024年第5期

关键词 : 含粗骨料超高性能混凝土；尺寸效应；钢纤维；减缩剂；收缩性能；力学性能；抗氯离子渗透性能

Key words : Ultra-high performance concrete with coarse aggregate; Size coefficient; Steel fiber; Shrinkage reducing agent; Shrinkage property; Mechanical property; Chloride ion penetration resistance

刊期 : 2024年第5期

DOI : 10.19761/j.1000-4637.2024.05.051.06

文章编号 :

基金项目 : 中山市重大科技专项项目（20220506）。

作者 : 王军，刘晓峰，陈镇衫，罗西，余辉，廖树基

单位 : 明阳智慧能源集团股份公司，广东中山 528437

王军，刘晓峰，陈镇衫，罗西，余辉，廖树基

王军,刘晓峰,陈镇衫,等.含粗骨料UHPC的强度尺寸效应与性能研究[J].混凝土与水泥制品,2024(5):51-56.

WANG J,LIU X F,CHEN Z S,et al.Study on strength size effect and performance of UHPC with coarse aggregates[J].China Concrete and Cement Products,2024(5):51-56.

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摘要

参数

结论

参考文献

引用本文

Abstract: The effects of the composition ratio of cementitious materials and the type of steel fibers (straight and end-hooked) on the strength size effect, workablity and shrinkage properties of ultra-high performance concrete (UHPC) with coarse aggregates were investigated, and the effects of the content of shrinkage reducing agent (0~2.0%) on the shrinkage properties, mechanical properties, chloride ion penetration resistance and pore structure of UHPC with coarse aggregates were analyzed. The results show that increasing the content of fly ash appropriately is conducive to improving the workability and reducing the shrinkage of UHPC with coarse aggregates. The addition of steel fibers reduces the workability of UHPC with coarse aggregates, but inhibits the shrinkage, and the suppression effect is more significant with end-hooked steel fibers. Adding 1% content of steel fibers effectively reduces the strength size effect of UHPC with coarse aggregates, and the reduction effect of the straight steel fibers is better. The addition of shrinkage reducing agent obviously reduces the shrinkage of UHPC with coarse aggregates, but reduces the compressive strength, increases the total porosity, and deteriorates the chloride ion penetration resistance.

关键词:

the

uhpc

and

shrinkage

with

coarse

骨料

aggregates

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