In order to improve the use and service performance of adhesives for repairing the leakage of underground comprehen-sive pipe rack column structures,the effects of epoxy resin ratio and accelerator addition in the adhesives on the surface dry per-formance,compressive shear strength,tensile shear strength,heat resistance,and water resistance of the adhesives were studied.The results showed that as the ratio of epoxy resin Ⅰ/Ⅱ decreased,the surface drying time of the adhesive first decreased and then increased,and the 3D compressive shear strength and 3D tensile shear strength first increased and then decreased.At a ratio ofⅠ/Ⅱ of 1∶1,the minimum surface drying time(29 minutes),the maximum 3D compressive shear strength(17.6 MPa),and the maximum 3D tensile shear strength(11.2 MPa)were obtained.At a promoter addition of 2％,the adhesive had good 7-day compressive shear strength at 0 ℃ The 7-day compressive shear strength at 80 ℃ and the 7-day compressive shear strength af-ter immersion in water have good heat and water resistance properties.As the aging time increases from 0 to 36 hours,the com-pressive shear strength and tensile shear strength of the adhesive show a trend of first increasing and then decreasing.The maxi-mum compressive shear strength and tensile shear strength are obtained at an aging time of 7 days.
关键词
胶粘剂/环氧树脂比例/促进剂添加量/表干时间/力学性能
Key words
adhesive/epoxy resin ratio/the amount of accelerator added/surface drying time/mechanical property
维普
万方数据