摘要
2020年6月新发布实施的《JG/T408-2019:钢筋连接用套筒灌浆料》修改了竖向膨胀率的指标范围,并增加了28d自干燥收缩的指标范围,文中在此基础上研究硫铝酸盐水泥掺量、石灰石粉掺量、膨胀剂的复配对套筒灌浆料力学性能和膨胀性能的影响。结果表明:套筒灌浆料1d、3d和28d抗压强度分别为:47.1MPa,77.8MPa和113.0MPa,3h和24-3h竖向膨胀率分别为:0.066%和0.166%,28d自干燥收缩为-0.015%,满足新标准的性能要求。
The newly released and implemented "JG/T408-2019: Sleeve Grouting for Rebar Connection" in June 2020 revised the index range of vertical expansion rate and increased the index range of 28 d self-drying shrinkage. On this basis, research The influence of sulfoaluminate cement content, limestone powder content, and expansion agent on the mechanical properties and expansion properties of the sleeve grouting material. The results show that the 1 d, 3 d and 28 d compressive strengths of the sleeve grouting material are: 47.1 MPa;77.8 MPa;113.0 MPa, the vertical expansion rates of 3 h and 24-3 h are 0.066% and 0.166%, respectively, and the shrinkage of 28 d self-drying is-0.015%, meeting the performance requirements of the new standard.
作者
胡腾
陈景
刘其彬
杨家雨
Hu Teng;Chen Jing;Liu Qibin;Yang Jiayu(China Construction West Construction New Material Technology Co.Ltd.,Chengdu,Sichuan 610000)
出处
《江西建材》
2020年第S01期52-54,共3页
Jiangxi Building Materials
关键词
硅酸盐水泥基套筒灌浆料
膨胀剂
自干燥收缩
Portland cement-based sleeve grout
Expansion agent
Self-drying shrinkage
