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粗粒度区间钢渣微粉在UHPC中的应用研究
Application Study of Steel Slag Fine Powders with Coarse Particle Sizes Rang in Ultra High Performance Concrete(UHPC)
2019年第8期
粗粒度区间;钢渣微粉;超高性能混凝土;抗压强度;孔隙率;工作性
Coarse particle size range; Steel slag fine powder; Ultra high performance concrete; Compressive strenght; Porosity; Workability
2019年第8期
10.19761/j.1000-4637.2019.08.001.04
国家863计划项目(2015AA034701);国家自然科学基金项目(51202109);江苏省高校优势学科建设工程资助项目(PAPD);国家“江苏先进生物与化学制造协同创新中心”资助项目;2015全国建筑材料行业科技创新项目计划(2015-M3-2)。
祖庆贺1,2,臧 军2,沈晓冬1
1.南京工业大学材料科学与工程学院,210009;2.徐州中联混凝土有限公司,221100

祖庆贺1,2,臧 军2,沈晓冬1

祖庆贺,臧军,沈晓冬.粗粒度区间钢渣微粉在UHPC中的应用研究[J].混凝土与水泥制品,2019(8):1-4.

ZU Q H,ZANG J,SHEN X D.Application Study of Steel Slag Fine Powders with Coarse Particle Sizes Rang in Ultra High Performance Concrete (UHPC)[J].China Concrete and Cement Products,2019(8):1-4.

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摘 要:用粒度区间为45~80 μm的较粗钢渣微粉作为掺合料进行了UHPC的应用研究,试验结果表明,与基准混凝土相比,45~80 μm钢渣微粉在UHPC中以5%掺量取代水泥和复合掺合料后,UHPC的孔隙率降低、孔径分布得到优化、塑性黏度降低了42 Pa·s、流动性能提升(V漏斗排空时间减少了20 s)、28 d抗压强度提高了10~12 MPa、抗折强度提高了2~3 MPa。 Abstract:The coarse steel slag powders with particle sizes ranging from 45 to 80 μm was used in ultra high performance concrete (UHPC) to enhance the properties of concrete. The results show that compared with the reference concrete, when the cement and fly ash in concrete replaced by coarse steel slag powders (45~80 μm) with a concentration of 5%, the porosity of UHPC is reduced, the pore size distribution is optimized, the plastic viscosity is reduced by 42 Pa·s, the flow performance is improved (V funnel emptying time is reduced by 20 s), the 28 d compressive strength is increased by 10~12 MPa, and the flexural strength is increased by 2~3 MPa.
英文名 : Application Study of Steel Slag Fine Powders with Coarse Particle Sizes Rang in Ultra High Performance Concrete(UHPC)
刊期 : 2019年第8期
关键词 : 粗粒度区间;钢渣微粉;超高性能混凝土;抗压强度;孔隙率;工作性
Key words : Coarse particle size range; Steel slag fine powder; Ultra high performance concrete; Compressive strenght; Porosity; Workability
刊期 : 2019年第8期
DOI : 10.19761/j.1000-4637.2019.08.001.04
文章编号 :
基金项目 : 国家863计划项目(2015AA034701);国家自然科学基金项目(51202109);江苏省高校优势学科建设工程资助项目(PAPD);国家“江苏先进生物与化学制造协同创新中心”资助项目;2015全国建筑材料行业科技创新项目计划(2015-M3-2)。
作者 : 祖庆贺1,2,臧 军2,沈晓冬1
单位 : 1.南京工业大学材料科学与工程学院,210009;2.徐州中联混凝土有限公司,221100

祖庆贺1,2,臧 军2,沈晓冬1

祖庆贺,臧军,沈晓冬.粗粒度区间钢渣微粉在UHPC中的应用研究[J].混凝土与水泥制品,2019(8):1-4.

ZU Q H,ZANG J,SHEN X D.Application Study of Steel Slag Fine Powders with Coarse Particle Sizes Rang in Ultra High Performance Concrete (UHPC)[J].China Concrete and Cement Products,2019(8):1-4.

摘要
参数
结论
参考文献
引用本文

摘   要:用粒度区间为45~80 μm的较粗钢渣微粉作为掺合料进行了UHPC的应用研究,试验结果表明,与基准混凝土相比,45~80 μm钢渣微粉在UHPC中以5%掺量取代水泥和复合掺合料后,UHPC的孔隙率降低、孔径分布得到优化、塑性黏度降低了42 Pa·s、流动性能提升(V漏斗排空时间减少了20 s)、28 d抗压强度提高了10~12 MPa、抗折强度提高了2~3 MPa。
Abstract:The coarse steel slag powders with particle sizes ranging from 45 to 80 μm was used in ultra high performance concrete (UHPC) to enhance the properties of concrete. The results show that compared with the reference concrete, when the cement and fly ash in concrete replaced by coarse steel slag powders (45~80 μm) with a concentration of 5%, the porosity of UHPC is reduced, the pore size distribution is optimized, the plastic viscosity is reduced by 42 Pa·s, the flow performance is improved (V funnel emptying time is reduced by 20 s), the 28 d compressive strength is increased by 10~12 MPa, and the flexural strength is increased by 2~3 MPa.

关键词:
粗粒度区间;钢渣微粉;超高性能混凝土;抗压强度;孔隙率;工作性
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针对UHPC的塑性黏度偏高的现状,将粒度区间为45~80 μm的钢渣微粉引入UHPC的胶凝材料体系,由于钢渣微粉较低的表面能以及对混凝土体系颗粒级配的优化作用,适量的钢渣微粉有效降低了UHPC的塑性黏度,提升了UHPC的流动性。由于钢渣微粉的水化活性不足,过量使用会降低UHPC的力学性能,因此,其适宜掺量为5%左右。

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祖庆贺,臧军,沈晓冬.粗粒度区间钢渣微粉在UHPC中的应用研究[J].混凝土与水泥制品,2019(8):1-4.

ZU Q H,ZANG J,SHEN X D.Application Study of Steel Slag Fine Powders with Coarse Particle Sizes Rang in Ultra High Performance Concrete (UHPC)[J].China Concrete and Cement Products,2019(8):1-4.

 

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