Study on bond shrinkage deformation of new and old concrete
In order to improve the bonding effect of new and old concrete,the three factor and three level orthogonal test method is used to study the influence of interface roughness,the content of shrinkage reducing agent and the content of basalt fiber on the shrinkage deformation performance of bonding interface.The results show that the influence of interface roughness on shrinkage is not significant at the three confidence levels,the influence of shrinkage reducing agent and basalt fiber content is significant at the confidence levels of 90％and 95％,and the influence is not significant at the confidence level of 99％.The order of influence on the interfacial shrinkage of new and old concrete is basalt fiber content＞shrinkage reducing agent content＞interfacial coarseness.When the interface roughness is 3.0～3.5 mm,the content of shrinkage reducing agent is 4％and the content of basalt fiber is 6％,the effect of new and old concrete on restraining shrinkage deformation is the best.
万方数据
维普
