超高性能混凝土工作性与强度影响因素分析

材料导报

2020, Vol. 34

Issue (Z1): 203-208

无机非金属及其复合材料

超高性能混凝土工作性与强度影响因素分析

卢喆¹, 冯振刚¹, 姚冬冬², 纪鸿儒¹, 秦卫军², 于丽梅²

1 长安大学公路学院,西安 710064;
2 吉林省交通科学研究所,长春 130000

Analysis of Influencing Factors on Workability and Strength of Ultra-highPerformance Concrete

LU Zhe¹, FENG Zhengang¹, YAO Dongdong², JI Hongru¹, QIN Weijun², YU Limei²

1 School of Highway, Chang'an University, Xi'an 710064, China;
2 Jilin Provincial Transport Scientific Research Institute, Changchun 130000, China

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摘要材料组成对超高性能混凝土(UHPC)的性能具有至关重要的影响。采用坍落扩展度、抗压强度和抗折强度试验,分别分析了水胶比、钢纤维、减水剂、硅灰、粉煤灰对UHPC工作性和强度的影响,提出了适宜的UHPC材料组成配比;通过灰色关联度分析,对比了不同影响因素对UHPC工作性与强度的影响程度。结果表明:UHPC的各组成材料推荐用量为水胶比0.18~0.20,钢纤维25~50 kg/m³,减水剂20~25 kg/m³,硅灰120~130 kg/m³,粉煤灰100~110 kg/m³。水胶比对UHPC工作性的影响最显著,水胶比越大,UHPC的流动性越好;钢纤维对UHPC工作性的影响最小。与水胶比和钢纤维相比,粉煤灰、减水剂、硅灰对UHPC抗压强度的影响较为明显;对于抗折强度,水胶比的影响最大,硅灰的影响最小。

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	卢喆
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	于丽梅

关键词: 超高性能混凝土工作性抗压强度抗折强度水胶比

Abstract: The material composition has a critical impact on the performance of ultra-high performance concrete (UHPC). The effects of water-binder ratio, steel fiber, super-plasticiser, silica fume and fly ash on the workability and strength of UHPC were analyzed by using the flow expansion test, compressive strength and flexural strength tests. The suitable composition of UHPC was put forward. Through the grey relation analysis method, the influence degree of different factors on the workability and strength of UHPC was compared. The results show that recommended dosage of UHPC components is as follows: water-binder ratio 0.18—0.20, steel fiber 25—50 kg/m³, super-plasticise 20—25 kg/m³, silica fume 120—130 kg/m³, fly ash 100—110 kg/m³. The water-binder ratio has the greatest impact on the workability of UHPC. The greater the water-binder ratio is, the better the fluidity of UHPC. The steel fiber content has minimal impact on its workability. Compared with water-binder ratio and steel fiber, fly ash, super-plasticiser and silica fume have obvious effects on the compressive strength of UHPC. The water-binder ratio has the greatest effect but the silica fume has the least effect on the flexural strength of UHPC.

Key words: ultra-high performance concrete workability compressive strength flexural strength water-binder ratio

发布日期: 2020-07-01

ZTFLH:

TU528

基金资助: 国家自然科学基金(51508032);吉林省交通运输厅科研项目(2017-1-7);长安大学中央高校基本科研业务费专项资金(300102219216)

作者简介: 卢喆,长安大学公路学院在读硕士研究生,主要从事道路建筑材料领域的研究;冯振刚,工学博士,博士后经历,湖北省优秀博士论文获得者。现为长安大学公路学院副教授,硕士研究生导师,主要从事道路建筑材料及交叉学科方面的科研与教学工作。在国内外重要期刊发表文章30多篇,其中SCI、EI检索20篇,授权专利10余项。

引用本文:

卢喆, 冯振刚, 姚冬冬, 纪鸿儒, 秦卫军, 于丽梅. 超高性能混凝土工作性与强度影响因素分析[J]. 材料导报, 2020, 34(Z1): 203-208.
LU Zhe, FENG Zhengang, YAO Dongdong, JI Hongru, QIN Weijun, YU Limei. Analysis of Influencing Factors on Workability and Strength of Ultra-highPerformance Concrete. Materials Reports, 2020, 34(Z1): 203-208.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2020/V34/IZ1/203

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