Design of polyurethane modified epoxy resin gravel bonding layer material for steel bridge deck
Polyurethane modified epoxy resin has become one of the choice of bonding layer materials for steel bridge deck due to its high bonding strength and excellent deformation performance.According to the characteristics of the bonding layer paving method of steel bridge deck,the steel plate+bonding layer+SMA composite specimen was made.The interlayer shear strength was used as the evaluation index,and the amount of each material of the bonding layer was used as the change factor.The orthogonal test method was used to design and analyze the five-factor four-level test.The results show that the bonding strength between polyurethane modified epoxy resin gravel and steel plate is high,and the failure of composite specimens occurs between the bonding layer and the SMA of the overlying layer.The amount of hot-melt modified epoxy resin has the greatest influence on the shear strength of the bonding layer,and the amount of the first layer of gravel has the least influence.The interlaminar shear strength increases first and then decreases with the change of the amount of hot melt modified epoxy resin,the second layer of crushed stone and polyurethane modified epoxy resin,and the optimum amount is 1.9 kg·m-2,6.0 kg·m-2 and 2.4 kg·m-2,respectively.Theamount of thefirst layer of gravelis recommended to be 6.0 kg·m-2,and the amount of polyurethane modified epoxy resin should be further determined in the range of less than 2.1 kg·m-2.
万方数据
维普
