Experimental Study on Anchorage Performance of Mortar Anchorage Body in Ion Erosion Environment
Anchorage body in long-term marine or coastal environments are subject to ionic erosion leading to durability degradation.In order to study the anchorage performance of anchorage body in ionic erosion environment,the surface damage,anchor strength,and bond strength between mortar and bolt of ordinary and prestressed anchorage body were analyzed under different corrosion environments and corrosion times through long-term immersion test.The results showed that the corrosion period and prestressing of the bolt accelerated their corrosion.In the initial stage of corrosion,an oxide film was formed on the surface of the bolt,so the corrosion effect of different corrosion solutions on the anchor rods was not significant.The bolt with prestress were more sensitive to the corrosion period,and their ultimate tensile strength decreases faster.The bond strength between mortar and bolt showed a linear change with the corrosion period,and the bond strength decreased faster with the increase of corrosion time if the bolt were prestressed.The weakening effect of corrosion solutions on the bond strength between mortar and bolt was in the order of mixed solution>sodium sulfate solution>sodium chloride solution.The research results can provide a basis for the durability study of anchorage body that serve in environments such as oceans and coastal saline soil for a long time.
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