Reinforcing and toughening effect of two-dimensional fiber reinforced materials on cement-based repair materials
The effects of different mass per unit area and different types(mesh,geotextile,fiber felt and stitched felt)of two-dimensional fiber reinforced materials on the ultimate tensile strength,elongation at break and tensile bond strength of cement-based repair materials were studied.The strengthening and toughening mechanism of different two-dimensional fiber reinforced ma-terials on repair materials was analyzed by the failure state of samples and SEM images.The results show that the reinforcement effect of 2D fiber reinforced material on the repair material is positively correlated with the mass per unit area.When the mass per unit area is the same(300 g/m2),the strengthening effect of the repair material is from large to small,in order of mesh cloth,stitched felt,fiber felt,geotextile.The toughening effect of 2D fiber reinforced materials on repair materials increased with the in-crease of mass per unit area of mesh fabric and geotextile fabric,and decreased with the increase of mass per unit area of fiber felt and stitched felt.When the mass per unit area is the same(300 g/m2),the toughening effect is from large to small for geotex-tile cloth,mesh cloth,fiber felt,stitched felt.After compounding mesh cloth and fiber felt,the tensile bond strength of the repair material increases first and then decreases with the increase of mass per unit area.After compounding geotextile and stitched felt,the tensile bond strength of the repair material gradually decreases with the increase of mass per unit area.
two-dimensional fiber reinforced materialsultimate tensile strengthelongation at breaktensile bond strengthen-hancing effecttoughening effect
万方数据
维普
