Effect of super absorbent polymer on shrinkage and flexural shear properties of wet joint
In order to improve the early shrinkage cracking of bridge wet joint concrete and the flexural shear resistance of the wet joint interface,high water absorption resin(SAP)was selected as a self curing agent to add to the wet joint concrete.The shrinkage strain of concrete under different SAP dosages was obtained through concrete shrinkage tests,and a reasonable SAP dosage was selected.And simulate the stress state of the wet joint structure through three-point bending and shear tests,and compare the bending and shear performance of the self curing concrete and ordinary concrete wet joint interfaces under four different interfaces.The results indicate that different amounts of SAP have varying degrees of influence on the early shrinkage strain of wet joint concrete.Based on the analysis of shrinkage test results,it is recommended that the SAP dosage be 2％o.The bending strength and shear strength of the self curing concrete wet joint interface under four different interface processes are superior to that of the ordinary concrete wet joint interface.It can be seen that a reasonable amount of SAP addition can inhibit the shrinkage deformation of concrete and improve the bending and shear resistance of the wet joint concrete interface.
high water absorbent polymerwet jointshrinkagebending resistanceshear resistance
万方数据
维普
