摘要
为研究粗粒度区间(45~80μm)钢渣微粉对自密实混凝土性能的影响,通过自密实混凝土的工作性能、抗压强度和体积稳定性综合评价其性能。结果表明:粗粒度区间钢渣微粉掺量低于15%时,自密实混凝土的塑性黏度可降低42 Pa·s左右,坍落拓展度提高20~70 mm。相较于基准样,粗粒度区间钢渣微粉能够小幅度提升自密实混凝土7和28 d的抗压强度。此外,自密实混凝土的早期收缩和长期收缩也都有一定程度的改善。
The influence of steel slag micro-powder of coarse particle size range( 45-80 μm) on the performance of the self-compacting concrete was investigated. The workability,compressive strength and volume stability of the concrete were evaluated. Results showed that when the amount of slag was lower than 15%,the plastic viscosity of C60 self-compacting concrete deceased noticeably by 42 Pa·s and the mobility increased by 20-70 mm.Compared with the standard,the compressive strength of self-compacting concrete for 7 and 28 d increased by a small margin,and the early-stage shrinkage and long-term shrinkage of self-compacting concrete were also improved.
引文
[1]余成行,肖鑫,谢光辉.C70内浇混凝土巨柱的施工与实体检测[J].混凝土与水泥制品,2016(6):82.
[2]王玉棠.C80级高性能泵送混凝土的配制以及试验研究[J].混凝土,2000(6):39.
[3]罗世明,杨小华.C80高强高性能泵送混凝土研究与应用[J].混凝土,2009(6):97.
[4]ZHU W,PETER J M.Permeation properties of self-compacting concrete[J].Cement and Concrete Research,2003,33(6):921.
[5]陈丽华,叶燕华,缪汉良,等.自密实混凝土工作性能试验[J].南京工业大学学报(自然科学版),2008,30(3):47.
[6]吴文清,罗瑞华,钱配舒,等.C50自密实微膨胀钢管混凝土配制与应用研究[J].建筑技术开发,2006(7):64.
[7]徐杰,叶燕华,朱铁梅,等.胶凝材料对自密实混凝土工作性能的影响[J].南京工业大学学报(自然科学版),2013,35(5):76.
[8]杨建辉,童智洋.利用机制砂配制自密实混凝土[J].世界桥梁,2003(1):30.
[9]高育欣,叶勇,修晓明,等.一种机制砂自密实混凝土的制备和工程应用[J].四川建筑科学研究,2010,36(4):222.
[10]刘桂凤,方恩权,刘传兴.早龄期C40钢纤维自密实混凝土强度及弯曲性能研究[J].四川建筑科学研究,2007,33(4):59.
[11]余成行.C60泵送顶升自密实钢管混凝土的配制与施工[J].混凝土,2010(10):91.
[12]李徐.机制砂自密实混凝土在高速公路中的试验研究[J].公路工程,2013(6):224.
[13]王琳,孙本良,李成威.钢渣处理与综合利用[J].冶金能源,2007,26(4):54.
[14]WANG Q,YAN P.Hydration properties of basic oxygen furnace steel slag[J].Construction and Building Materials,2010,24(7):1134.
[15]TSAKIRIDIS P E,PAPADIRNITRIOU G D,Tsivilis S.Utilization of steel slag for Portland cement clinker production[J].Journal of Hazardous Materials,2008,152:805.